Whole Foods Case Study Example | Topics and Well Written Essays - 1250 words

Whole Foods - Case Study Example Thus, changing business dynamics to suit the transforming business environment ensure that companies not only survive but are also able to maintain their competitive advantage within the industry. The paper would therefore be analyzing Whole Food Inc for business initiatives that has helped them to maintain their market position even during the recessive period. Analysis of Whole Food Whole Food Market was started in 1980 in Austin, Texas as local supermarket that focused on natural and health food with emphasis on organically produced food products. As one of the largest retail market chains of organic food, the company’s 276 retail outlets across US, UK and Canada have seen stupendous revenue growth of 30% by 1991 and 20% since 2000. The company intends to achieve a target of 400 stores with revenue worth $12 billion by 2010. John Mackey, CEO of Whole Food, has been an exemplary leader whose intrinsic beliefs in the strategic vision and core values of the company have steere d it to the path of enviable success. Strategic vision and core values Company’s vision is to become a global brand for best quality natural and organic food and best food retailer in every community that it serves. The mission statements of the company are designed to meet the food requirements of the people by providing them with healthy food so that they can lead a healthier life and live longer. The core values of the company highlight sustainable business practice and are fundamentally based on ensuring customer satisfaction not only through quality food that is organically produced by also by empowering them with knowledge and information that would promote their general well being. The core values are aligned to their vision and mission. Interests of all stakeholders including workforce, customers and supply chain is taken into consideration within the business strategy of Whole Food. Business strategy and operational efficiency The company ensures customer satisfactio n by providing them with high quality of natural and organically produced wide variety of food products. The Whole Food stores had large, open format on huge area, often exceeding 40,000 square feet. The stores had well defined segments with cafeteria facility which ensured that customers could also taste and test the quality food that they would be buying. The brochures and information about food products and sustainable business practice were made available. The organizational culture emphasizes diversity in workplace and promotes cross cultural understanding to create barrier free and encouraging environment. The team leaders within the stores are empowered to make independent decisions that ensures improved performance outcome. The company fulfills its social accountabilities through measures of employees’ welfare schemes, environmental concerns and charitable works in the area of education, training and development of entrepreneurial skills etc. Its suppliers of food pro ducts from low waged countries were helped financially to ensure quality produce that also helped them to raise their living standard. It has introduced various innovative measures to propagate its environmental policies among its in-house staff and business partners. It has also facilitated wider interaction with various focus groups and forged alliances to motivate and promotes proactive participation of the public and workforce in its drive for environmental conservations. The growth plans of companies are primarily through opening of new stores and through acquisition of smaller stores which have also been into the same business. The company’s philosophy of ‘Whole Food, Whole People, Whole Planet’

Fluency Reading Plan Essay Example for Free

Fluency Reading Plan Essay Brief Synopsis- The story takes place on Manor Farm and has a third person perspective. The animals on the farm are unhappy with their current conditions. Led by a few pigs they revolt against the farmer that housed them. They hope to form a utopian farm for all animals. However, Napoleon (one of the pigs that started the revolution) starts to manipulate the animals and the humans around the farm. The farm starts to resemble its former self and Major begins to resemble the villainous farmer. This book is basically depicting communism in an interesting way. Overview of the Unit Reading fluency is an extremely difficult area to assess and instruct. In general, there are three areas that are addressed that make up fluency phonemic awareness (being able to say words and understand the construct of the letters that make up the word), grammar and comprehension. These three areas formed together help a teacher assess the students they have. However, it is still very difficult to classify since fluency seems to come natural to many students especially by grade 8 (Rasinski, 2004). Keeping all of this in mind there still needs to be a definitive gauge for assessment. This unit is based around some reading aloud in class. After the students have read on their own time, having them reread the various passages out loud will help to increase their fluency. According to the book Classrooms that Work, â€Å"repeated readings is a way to help students recognize high-frequency words more easily, thereby strengthening their ease of reading† (Addison-Wesley 1998). This will also allow for the next area of significance to become a link in the fluency chain-vocabulary. The student’s readings will provide opportunities to ask them about the various vocabulary words in this unit. The unit will stress various vocabulary words and a higher order of thinking to gain comprehension. As they read, the teacher can pick out these words and engage the students to see if they comprehend what is being said. If the students do not understand the words, the next step cannot happen which is comprehension. Comprehension and fluency are forever linked. One cannot happen without the other. The easiest way to label it is students must be able to understand what they read. That is why in many younger grades, grade levels are not simply based on the student being able to read the words, but to what degree they understand what they are reading. The main construct of the lesson is to expand the knowledge of the students and have them reading something outside of their normal realm. Students should always feel they are learning something new (Grabe, 2010). This book and unit will allow for that to happen. Reading aloud by the students, by the teacher, and discussions about various vocabulary and plot themes will make this lesson successful. The students will read a great book that is a classic and they will gain an understanding of some high school level vocabulary and thought processes. References Cunningham, P. M. Allington, R. L. Classrooms That Work: They Can All Read and Write. Addison-Wesley Educational Publishers Inc. 1999 Rasinski, T. (2004). Creating fluent readers. Educational Leadership, 61(6), 46-51. Grabe, W. (2010). Reading in a second language. Ernst Klett Sprachen.

Asperger’s Syndrome Essay examples -- Health, Diseases

Asperger’s syndrome is becoming more and more common as time goes by. Each year, more children are being diagnosed. This paper focuses on Asperger’s Syndrome and developing social skills in various social settings. By looking at the etiology, diagnostic procedures, how the condition effects development, daily challenges, current social/cultural views, and relevant social interventions, a better understanding on how to develop social skills for children with Asperger’s Syndrome can ensue. The world revolves around social situations. This is how people are hired for jobs, ask for things, make new friends, meet their future spouse, etc. At the moment, social skills training and social support is minimal compared to where it potentially could be (Rao, Beidel, & Murray, 2008). Teaching someone with Asperger’s Syndrome better social skills will allow social acceptance, the ability to use adaptive behavior in a certain setting, and allow for independence fr om others to help them into social situations (Banda, Hart, & Liu-Gitz, 2010). People with Asperger’s Syndrome are like everyone else. They just need help in gaining social skills to better off themselves in a world based on social interaction. Asperger’s syndrome diagnosis has been on the rise recently. This is due to a better understanding of the syndrome and how to effectively diagnose Asperger’s. Now, people who were considered â€Å"weird† or â€Å"interesting† in fact, have Asperger’s. Little research has been done on this syndrome which causes limited services and support (Stoddart, 2009). There are many theories on how Asperger’s is obtained. In Stoddart’s (2009) chapter, one belief is centered on genetics. Something triggers multiple genes to act together in a negative w... ...ldren with Asperger’s are brilliant human beings who deserve to interact with the normal of society. They deserve to have the same social jobs like a teacher, business man, or sales man. Their views should not be lessened but rather increased. Future studies should include bigger social situations and applied to more participants. Also, the idea of adults being taught social skills should be evaluated. There is a generation out there of adults who are undiagnosed but still need some sort of intervention. Studies already show that it is possible to teach a child to normally and socially interact. The possibilities are endless for a child with Asperger’s. Hopefully, in the near future, there will be more of an understanding of what is going on in the brain of a child with Asperger’s and new skills will arise that greatly improve their social life forever.

Capitalism :: essays research papers

Capitalism and the Renaissance   Ã‚  Ã‚  Ã‚  Ã‚  Capitalism is an economic system in which the means of production and distribution are privately or corporately owned and development is proportionate to the accumulation and reinvestment of profits gained in a free market. Capitalism lead to great changes in banking and business for Europeans It came to Europe after the devastating black death and while Europe was suffering from poor economic growth.   Ã‚  Ã‚  Ã‚  Ã‚  By looking at this definition, it is hard to see how this economic systems is linked to the Renaissance, which occurred in Europe. These two events in western civilization have great links which tie the two event together.   Ã‚  Ã‚  Ã‚  Ã‚  The Renaissance was a period of time in Europe when craftsmen, mostly artists, broke away from craft guilds to pursue their own ventures in their trade. It is also know as the rebirth of the classics. Artists began painting and sculpting for the royal and wealthy. Most of the masterpieces had to do with religion or portraits of royalty to make the patron that was paying for the service merely immortal since this painting would be famous and around for as long as it could be preserved. Religious scenes were painted to give people a visual idea of events that took place. Artist also put their own design into artwork in order to express feelings that were felt at this time in their life.   Ã‚  Ã‚  Ã‚  Ã‚  After comparing the Renaissance and the type of economic system that capitalism is, you can see that they both allow to entrepreneurs to operate as a single unit rather than be a part of the state of part of a guild. The word that pulls both the Renaissance and capitalism together is individualism. Both events were to events helped individuals to prosper immensely for themselves and move away from government and religious controlled work.   Ã‚  Ã‚  Ã‚  Ã‚  Renaissance and capitalism both brought about a way for individuals to make money. Capitalism allowed for sole proprietors to run businesses and make a living for themselves. In a similar way, artists were able to make money buy using their talent and providing a service to others on an individual basis. The artists were looked up to my even the most wealthy merchants because of the power the had to make them know forever though their work. Both the businessmen and artists both earned respect and were well known in society and also earned a certain status for themselves.

Development from Birth †19 Years Essay

All children and young people develop at different rates, but the order which they advance in differs very little. Children’s development tends to progress from head to toe, inner to outer, from simple to complex and from general to specific. Each child’s physical, social, emotional, and intellectual and language development will be looked at through age stages. All of these categories are as important as each other and can each have a substantial impact on the child’s full adult potential. Physical development is the growth of movement skills in both fine and gross motor skills and development in hand to eye co-ordination. Each of these is inter-connected and therefore can all be of impact to one another. Social and emotional development is the process of forming relationships, learning social and cultural skills, caring for others, independency, decision making, building confidence and learning to handle emotions in a healthy way. Intellectual development refers to the understanding of information, lengthening attention span, the reasoning in daily experiences, developing memory, logical thinking and questioning. Language development is the understanding and gaining of language, developing vocabulary and b ody language. 0-6 Months: Physical development : At this stage a baby should be able to turn their head towards sound and movement, watch an adult’s face when feeding and smile at the faces and voices they find familiar. They should be able to hold their feet when lying on their back, look and reach for objects, hold and shake a rattle and put items in their mouths. Social and emotional development: At this age a baby will respond to adult’s voices and faces, prominently their mothers, possibly by smiling. They will concentrate on adults face during feeding and be extremely dependent in adults for reassurance and comfort, quieting when held and cuddled. Language development: At this age a child should make a variety of â€Å"happy† sounds, respond to music and sounds (this can be very calming) abd watch their carers face and try to copy their movements. 6-12 Months: Physical Development: During this period a child should be able to move from sitting with support to sitting alone, roll from their tummy to their back and begin to crawl or shuffle on their bottom. Pulling or pushing against an adults hand to reach a standing position, raise arms to be lifted, turn to look when their name has been called and to try and reach for food to put in their mouth. Social and Emotional Development: A child will enjoy the company of others and games such as peek-a-boo, shows affection to main carer but be shy towards strangers. Language Development: The babbling sound begins! A young child will make 4 or 5 different sounds at this step, show feelings by squealing or crying and laugh or chuckle to show their enjoyment. 1-2 Years Physical Development: A young toddler will begin to walk (with or with-out a push along toy), sit alone confidently, wave goodbye, feed themselves, point to what they want and to shake their head for â€Å"no†. Their thumb and first two fingers will be used to grip, crawl upstairs, stoop when picking an object from floor level, begin to show preference for one hand, build tower of few bricks and to begin to hold crayon in palm and to scribble on paper. Social and Emotional Development: Like to please adults and to perform in front of an audience, may become anxious or distressed when separated from known adults, may grow attached to a comfort object (such as blanket), can mostly be cooperative and be easily distracted from unwanted behaviour and can play alongside other children. Language Development: Move from using single words to putting them together as a phrase, they will understand key words used in sentences, in the second year children start to understand the use of conversation and begin to copy carers. Children’s understand outstrips their ability to express themselves however by two years they could be using from 30 up to 150 words. 2-3 Years Physical Development: Kneels to play, throw and kick a ball, builds larger brick towers, pour liquids and uses pencils to make marks and circular scribbles. Social and Emotional Development: Developing sense of own identity and wanting to do things for their selves, demanding of adults attention and being jealous of adults attention being shred, reluctant to share play things, acts impulsively, requiring needs to be met instantly, prone to burst of emotion tantrums, enjoys playing with adults or older child who will give attention, beginning to play with others of own age for short periods of time. Intellectual Development (0-3 Years) Beginning to realise others are separate beings from themselves, imitates others and tries out ways of behaving in play, becoming more confident but still needs adult reassurance Language Development: Put words together in a sentence and beginning to ask questions (What? Why? How? Who? Where?) can join in well known songs or verses and put actions to words (Row-Row-Row the boat) Could possibly be using several hundred words by 3rd birthday, can scribble and make marks on paper with a crayon. 3-4 Years Physical Development: Large Motor Skills; Jump with feet together, walk on tip toes Throw a ball with aim and walk up and down the stairs. Fine Motor Skills; painting, threading beads on a lace, gain control over food utensils, use scissors and hold pencil to draw house and or people. Social and Emotional Development: becoming more independent and self-motivated, feels more secure and able to cope with unfamiliar surroundings and adults for periods of time, becoming more cooperative with adults and likes to help. Sociable and friendly with others, plays with children and more able to share, beginning to consider the needs of others and to show concern for others. Intellectual Development: Understand two or three simple things to do at once (eg Get a glass of water, bring it to your brother and then take the glass back to the kitchen) Can sort objects by size and type (by colours, animals or shapes) Language Development: (3-4 years)Pitch and tone can begin to be used alongside present and past tense. Vocabulary will be extended to 1000-1500 words and marks made by crayons will become more controlled. (4-5 years) Grammar can become more accurate and questions more complex, understand that books are a source of pleasure and use pictures to help them follow the story. Language will be used to communicate a child’s ideas and they may begin to recognise their own name and a few frequently seen written words, a pencil will be able to be help more confidently and shapes can be copied to form some lettering. 5-7 Years Physical Develpoment: Large Motor Skills; Hops, kicks with aim, catch a ball, skips, rides bicycle, climb confidently. Fine Motor Skills; Haandels pencil with control, copy shapes and write some letters, sews stitches, threads needle, can do buttons and shoe laces. Social and Emotional Development: Makes friends but may need help in resolving disputes, developing understanding of rules but still finds turn-taking difficult. Enjoys helping others and taking responsibility, learns lots about the world and how it workd, ad about people and relationships, makes friends (often short term) and plays group games, needs structure and routing to feel safe, when behaviour is over the top they need limits to be set. Intellectual Development: Begin to understand about sameness and difference in various aspects of life, can begin to understand that differences can exist side by side. Can begin to see different perspectives on the same subject, for example the same amount of water can look different in different containers. Language Development: During this period the chid can speak fluently and be able to make up stories, handle books well, understand that text carries meaning and recognise and increasing number of letters linking them to sounds. 7-12 Years Physical Development: Large motor skills are met such as running, jumping, skipping, climbing, kicking and hitting balls however teams games are usually enjoyed by age 8. Social and Emotional Development: Become less dependent on close adults for support and therefore can cope with the wider environment along with enjoying being in groups of other children of similar age, usually influenced easily by peers. Developing understanding of what behaviour is expected in certain situations and what is unacceptable, a sense of fairness and justice. Gender identity is becoming more apparent and preferring to play with same sex friends. Wanting to fit in with peer group and wanting to form closer relationships from age of 8. Intellectual Development: Able to read to themselves and will take a active interest in certain subjects by age 9. Language Development: Will need help learning how to spell complex words, with help from adults and teacher’s vocabulary will grow when new words are introduced, speech becomes fluent and can describe complicated happenings. Reading out loud and knowing the difference tenses and grammar will also become noticeable. 12-19 Years (Adolescence) Physical Development: Adolescence is said to be the period between childhood and adulthood, this can start from as early as 11 years and up to 19 or 20 years. The rate of development during these times can differ significantly and are different for both genders. This can be a very difficult time for teenagers as being similar to your peers can be a huge pressure; developing early or late can single teenagers out from others and bring up many emotional factors. Boys: Adolescence for boys usually starts at 14 years which is later compared to girls, however at the end of puberty boys are usually bigger than girls. Sex characteristics at this age are developing; these include body hair, deepening of the voice, broadness and muscle growth. Testicular and scrotum growth begins in early – mid puberty, the penis growth starts a bit later but continues for a longer time period. Girls: Puberty for girls can be as early as 8 years although the average age is 13. Breast budding is traditionally the beginning of puberty around the age of 10, pubic hair will then begin to grow and become curlier. Depending on when puberty first begins for each young lady they may be physically mature by the age of 15 and close to her full adult height however her hips and breasts may still become fuller. Social and Emotional Development: The first emotional factors to come with puberty are usually self-consciousness of the teenager’s body changes and whether they are â€Å"normal† compared to their peers. Emotional maturity can feel a drastic change to the teenagers, feeling their childish needs with adult desires, desiring independence but needing guidance; this can be a very confusing time for the young adults. Feeling less importance on their parents approval and instead turning to their friends for group-acceptance and behaviour codes. Along with this new found independence comes new questioning of the world, community values, personal values, beliefs and views; these will then individually sculpt the identity of the young adult. During this time many teens form close friendships with their peers of their own gender and most also develop an intense interest in the opposite gender, away from the emotional security their family provides the teenagers are open to many different emotional situations including potential rejection. Intellectual Development: With physical and emotional maturity comes maturity of the mind and the individual’s words and actions. As the teenager’s freedon and independence grows the need for maturity grows with it. During adolescence young people increasingly take responsibility in their lives in areas such as finances, employment, relationships and accommodation. The process of acquiring full responsibility should be complete by adulthood however; the rate of development is dependent on the amount of guidance given, to helping the brain to make the connections between knowledge and practical application to daily life. Education will be another main factor, next to parents, to shaping these young adults; the education system with its teachers will assist in helping the young adults to understanding moral, social, economic and cultural codes that will form the foundation of their identity. Language Development: As confidence and knowledge of language grows teenagers tend to develop different forms of communication such as sarcasm, â€Å"slang† language, shortened â€Å"text† language and the skill of formal or informal debate. Being able to express themselves with more words and forms of communications is a result of their maturity.

Summary Of The Letter From Birmingham Jail Essays - Free Essays

Summary Of The Letter From Birmingham Jail Essays - Free Essays Summary Of The Letter From Birmingham Jail On Good Friday in 1963, 53 blacks, led by Rev. Martin Luther King, Jr., marched into downtown Birmingham to protest the existing segregation laws. All were arrested. This caused the clergymen of this Southern town to compose a letter appealing to the black population to stop their demonstrations. This letter appeared in the Birmingham Newspaper. In response, Martin Luther King drafted a document that would mark the turning point of the Civil Rights movement and provide enduring inspiration to the struggle for racial equality. Martin Luther King's Letter from Birmingham Jail strives to justify the desperate need for nonviolent direct action, the absolute immorality of unjust laws together with what a just law is, as well as, the increasing probability of the Negro resorting to extreme disorder and bloodshed, in addition to his utter disappointment with the Church who, in his opinion, had not lived up to their responsibilities as people of God. King's justification to the eight clergymen for protesting segregation begins with a profound explanation of their actions, Nonviolent direct action seeks to create such a crisis and foster such a tension that a community which has constantly refused to negotiate is forced to confront the issue. The actions of the African American people are overdue and very well planned as King had explained in the letter. Their quest was to force the white politicians to negotiate and actually heed the requests for desegregation. As King explains, past promises have been broken by the politicians and merchants of Birmingham and now is the time to fulfill the natural right of all people to be treated equal. Violence is not what King wants, he simply wants unjust laws to change and the Supreme Courts 1954 ruling to be upheld. Secondly, Kings answer to the clergymen's assertion that breaking the law is not the way to achieve the results the African American is looking for. Conversely, one has a moral responsibility to disobey unjust laws. I would agree with St. Augustine that, an unjust law is no law at all. King does not feel that they have broken the law, his definitive answer to the clergymen is that a law that is not morally sound is not a law. Laws are made to protect the people not degrade and punish. As far as King is concerned, the African American will continue to do whatever is necessary, preferably non-violently, to obtain the legal and moral right that is theirs. If they are not allowed this peaceful expression of the needs they so desire, it could lead to a much uglier action. Dr. King expressed his concern that if something is not done with these feelings and absolute needs of the African American there will be violence and mayhem. The Negro has many pent-up resentments and latent frustrations, and he must release them. So let him March. History has shown that if a person or people are ignored they will become violent and fight for their God-given rights. King diligently explained that black nationalist groups are becoming prevalent in society and he has faith that the Negro Church has had direct influence in keeping the violence from erupting. However, how can they are expected to stay complacent? Finally, the sheer frustration King felt was with the Church in general. In deep disappointment I have wept over the laxity of the church. There can be no deep disappointment where there in not deep love. This is probably the most heartbreaking assertion King makes. He feels that the Church has skirted its responsibilities to the African American people, hiding behind anesthetizing security of stained-glass windows. King summarizes his letter by making the point that he hopes that the Church will see it's responsibilities it's means it is/you need its as people of God and understand the need for direct action, the justification of unjust laws and the impending danger of the African American rising up in violence if they are not heard. Martin Luther King does this all in a diplomatic, heartfelt and completely inoffensive voice.

Rousseaus Thoughts on Women and Education

Rousseau's Thoughts on Women and Education Jean-Jacques Rousseau is considered one of the key Enlightenment philosophers, and his writings reveal that he was concerned with â€Å"equality among men,† but he certainly did not make womens equality his focus. Having lived from 1712 to 1778, Rousseau was a major influence on the intellectual thinking of the 18th century. He inspired the political activism that led to the French Revolution and influenced Kant’s view of ethics, rooting them in human nature. His 1762 treatise Emile, or on Education and his book The Social Contract influenced philosophies about education and politics, respectively. Rousseaus main argument has been summarized as â€Å"man is good but has been corrupted by social institutions.† He also wrote that â€Å"nature has created man happy and good, but society depraves him and makes him miserable. The experiences of women, however, did not inspire this degree of contemplation from Rousseau, who essentially deemed them the weaker sex, content to be dependent upon men. Rousseaus Contradictory Views on Women While Rousseau is often praised for his views on human equality, the reality is that he did not believe women deserved equality. According to Rousseau, women needed to rely on men for their wellbeing because they were less rational than men. He argued that men might have desired women but did not need them to survive, while women both desired men and needed them. In Emile, he writes about the difference between what he believes women and men need in education. Since the main purpose in life, to Rousseau, is for a woman to be a wife and mother, she doesnt need to be educated to the extent that men traditionally have. He argues: â€Å"Once it is demonstrated that man and woman are not, and should not be constituted the same, either in character or in temperament, it follows that they should not have the same education. In following the directions of nature they must act together but they should not do the same things; their duties have a common end, but the duties themselves are different and consequently also the tastes that direct them. After having tried to form the natural man, let us also see, in order not to leave our work incomplete, how the woman is to be formed who suits this man.† Some critics view Emile as evidence that Rousseau thought woman should be subservient to man, while others contended that he was writing ironically. Some have also pointed out the fundamental contradiction in Emile about women and education. In this work, Rousseau suggests that women are responsible for educating the young while arguing that they are incapable of reason. â€Å"The whole education of women ought to be relative to men. To please them, to be useful to them, to make themselves loved and honored by them, to educate them when young... How can women educate anyone, even young children, if they themselves lack reasoning skills? Rousseaus views about women arguably grew more complex with age. In Confessions, which he wrote later in life, he credits several women with helping him gain entrance into the intellectual circles of society. Clearly, smart women had played a role in his own development as a scholar. Mary Wollstonecrafts Case Against Rousseau Mary Wollstonecraft addresses some of the points Rousseau made about women in Vindication of the Rights of Woman and other writings in which she asserts that women are logical and can benefit from education. She questions whether a woman’s purpose is only the pleasure of men. She also directly addresses Rousseau when she writes with great irony of his affection for an uneducated and ignorant servant girl. â€Å"Who ever drew a more exalted female character than Rousseau? Though in the lump he constantly endeavoured to degrade the sex. And why was he thus anxious? Truly to justify to himself the affection which weakness and virtue had made him cherish for that fool Theresa. He could not raise her to the common level of her sex; and therefore he labored to bring woman down to hers. He found her a convenient humble companion, and pride made him determine to find some superiour virtues in the being whom he chose to live with; but did not her conduct during his life, and after his death, clearly show how grossly he was mistaken who called her a celestial innocent.† The Difference Between Men and Women Rousseaus views on women invited criticism, but the scholar himself acknowledged that he had no solid foundation for his arguments about the differences between the sexes. He wasnt sure what biological differences made women and men distinct, calling them one of degree. But these differences, he believed, were enough to suggest that men should be strong and active, and women should be weak and passive. He wrote: If woman is made to please and to be subjugated to man, she ought to make herself pleasing to him rather than to provoke him; her particular strength lies in her charms; by their means she should compel him to discover his own strength and put it to use. The surest art of arousing this strength is to render it necessary by resistance. Thus pride reinforces desire and each triumphs in the others victory. From this originates attack and defense, the boldness of one sex and the timidity of the other and finally the modesty and shame with which nature has armed the weak for the conquest of the strong. The Link Between Opportunity and Female Heroism Before Emile, Rousseau listed the numerous woman heroes whod impacted society. He discusses Zenobia, Dido, Lucretia, Joan of Arc, Cornelia, Arria, Artemisia, Fulvia, Elisabeth, and the Countess of Thà ¶kà ¶ly. The contributions of heroines should not be overlooked. If women had had as great a share as we do in the handling of business, and in the governments of Empires, perhaps they would have pushed Heroism and greatness of courage farther and would have distinguished themselves in greater number. Few of those who have had the good fortune to rule states and command armies have remained in mediocrity; they have almost all distinguished themselves by some brilliant point by which they have deserved our admiration for them†¦. I repeat it, all proportions maintained, women would have been able to give greater examples of greatness of soul and love of virtue and in greater number than men have ever done if our injustice had not despoiled, along with their freedom, all the occasions manifest them to the eyes of the world. Here, Rousseau makes it plain that if given the opportunity to shape society as men had, women could very well change the world. Whatever biological differences between men and women existed, the so-called weaker sex had shown repeatedly that they were capable of greatness.

The Ideal Government through the View of Political Essays

The Ideal Government through the View of Political Essays The Ideal Government through the View of Political Philosophers Taylor McCauslin Jonathon Kreger November 25, 2015 Columbus State Community College Abstract The objective herein is to examine the ideal government through the view of three political philosophers, namely James Harrington, John Stuart Mill, and Thomas Aquinas. In their analysis of the most important elements for an ideal government, all three philosophers agree that issues related to the economy, tax, demographic representatives, the use of formalized rules, bureaucracy, and hierarchical authority are crucial in attaining their goal. While there are some similarities between the descriptions of an ideal government by the three philosophers, there are also glaring differences. While James Harrington argues that an ideal government is a small democracy, for example, Thomas Aquinas champions for a just monarchy. John Stuart Mill however, asserts that an ideal government is that which successfully attains two major goals: the enhancement of mental qualities and qualities of the personality within a nation's citizens. Key Words: Economy, Tax, Demographic Representatives, Formalized Rules, Bureaucracy, Hierarchical Authority James Harrington (1611-1677) James Harrington, in Oceana, a republican utopia, described what he thought was the ideal government (Harrington, 1656). In his descriptions, Harrington suggested that an ideal government is a small scale democracy which undertakes property owning. Harrington (1656) argued that such a government would not only be stable but also just. In such a government no person would be allowed to own or possess information worth more than 2,000 (Hopfl, 2004). Moreover, in regards to economy, referring to all processes of trade and consumption of products by the inhabitants of a distinct locality, Harrington's ideal government ascertained that only individuals who own property would be allowed to participate in government issues. In a similar manner to Aristotle, Harrington was convinced that the ideal government must be characterized by agricultural democracy (Hopfl, 2004). Harrington's views on tax and taxation were that the Agrarian law should be used to ensure that no person or group becomes too wealthy such that it interferes with the political balance of a state (Hopfl, 2004). Tax refers to the levies or tolls that are imposed by government on its citizens. Harrington was of the view that political issues such as tyranny and the oppression of one group by another arise when a single group possess all property. Wealth in such a state is determined by land ownership (Hopfl, 2004). In regards to demographic representation and bureaucracy, Harrington argued that an ideal government should be typified with religious tolerance, rotation of office and the use of secret ballot to select representatives (Harrington, 1656). While demographic representation is the tendency by selected individuals to stand for the interests and wishes of a larger group in a government, bureaucracy is a form of government where almost all decisions are made by government officers rather than elected representatives. This would eliminate too much variation in decision as we so often see today. However, there may not be as much interest in relation to the people in this form of government. John Stuart Mill (1806-1873) Mill describes an ideal government as that which successfully attains two major goals: enhancing the virtue and intelligence of citizens and the promotion of good qualities for the attainment of common interests in the long run (Lipkes, 1999). Mill was of the view that government is not only aimed at enhancing and producing the highest level of pleasure for its citizens but also to ensure that citizens are continuously educated in order for them to pursue higher level mental pleasures rather than lower ones. In order to achieve this objective, Mill argued that government should be guided by formalized rules. Formalized rules are legal regulations or decrees that govern the behavior of all individuals under their authority. Mill also argued that a good government is that which encourages and supports active participation by all voters. Mill described the worst type of government as that which compels its electorates to remain passively obedient and conform to the wishes of the ruling elite. Though this was probably because he was affiliated with Utilitarianism, Mill argued that an ideal government is that which could bring about maximal aggregate utility (Letwin, 1965). This clearly represents his wishes to attain contentedness within the people. Mill however agreed that the process of development by humans occurs in different phases and that different forms of government are suitable for different peoples and diverse stages of advancement which ultimately meant that he felt as though people should be put into different environments based on which their personality and skills would thrive the best in. While savages are

How does the Bhagavad-Gita reveal fundamental teachings of Hinduism Essay

How does the Bhagavad-Gita reveal fundamental teachings of Hinduism expressed in lyrical format - Essay Example To be specific, Bhagavad-Gita, which is in the form of sermon from the God (Lord Krishna), tends to reduce confusion and ethical predicament faced by Arjuna (the Pandava prince). When this sermon is generalized to the wider context of the fundamental teachings of Hinduism, one can easily identify that Yoga or selfless action is helpful to attain ‘moksha’ or enlightenment. Thesis statement: The fundamental teachings (theories) of Hinduism (say, yoga, karma/dharma and selfless action to attain the divine) are revealed through Bhagavad-Gita because it deals with the scope of the same in human life (special references to Bhagavad-Gita). The fundamental teachings of Hinduism expressed in lyrical format One can see that the fundamental teachings of Hinduism are expressed in lyrical format. For instance, the sacred texts/works in Hinduism like the Ramayana (the story of Rama’s journey), the Mahabharata (related to the dynastic struggle in ancient India), and the Puranas (related to spiritual and theoretical concepts in Hinduism) are expressed in lyrical format, especially in Sanskrit. So, lyrical format is the foundation of the fundamental teachings of Hinduism because the same deeply influenced the oral tradition of chanting mantras in Hinduism. Within this context, the fundamental teachings of Hinduism expressed in lyrical format include: yoga, karma/dharma and the importance of selfless action in human life to attain the divide power or the Brahman. First of all, yoga or unselfish action without considering the consequence is the most important aspect of the fundamental teachings of Hinduism. A yogi (a person who is ready to discard worldly pleasures) can attain moksha because he or she is ready to shed ego. Karma or the amassed liability of one’s actions in day to day life is another important element of the fundamental teachings of Hinduism. To be specific, karma hinders one from attaining moksha. Within this context, dharma or duty min dedness can help one to escape from the cyclic process of birth, death and rebirth. Another important element of the fundamental teachings of Hinduism is selfless action. One can easily identify that Hinduism provides ample importance to selfless action, not idleness. From a different angle of view, yoga and dharma lead one towards selfless action and salvation. Revelation of the fundamental teachings of Hinduism through Bhagavad-Gita The most important elements of the revelation of the fundamental teachings of Hinduism through Bhagavad-Gita can be divided into three: yoga, karma/dharma and the importance of action. A. Yoga The most important aspect of Bhagavad-Gita which reveals the fundamental teachings of Hinduism is yoga. In Bhagavad-Gita, Lord Krishna motivates prince Arjuna by pointing out the importance of yoga in one’s life. When Arjuna hesitates to be the part of the Kurukshetra war against his relatives, Lord Krishna motivates him by creating awareness on the import ance of action in human life. Selfishness cannot help one to attain moksha. Instead, selfless action can help one to realize the eternal truth/enlightenment. Mehta (2005) makes clear that â€Å"according to Gita, work should be performed for its own sake, with whole-hearted attention, unaffected by any thought of success or failure, profit or loss, honor or dishonor, fame or loss of fame etc† (p.39). Yoga is interconnected with devotional service and action in life. Other elements or steps which can help one to be a yogi are meditation and knowledge. To be specific,

Response to the environmental impacts of tourism on Brecon Beacons Research Paper

Response to the environmental impacts of tourism on Brecon Beacons National Park - Research Paper Example The environment of the national parks have been providing great benefits to the government since it can help in developing business opportunities as well. Though national parks are considered a tourist places in most of the countries, it has its own problems. Places where tourism is given more importance have been prone to problems like pollution. The studies, researches and surveys reveal that tourism has a great impact on these national parks. Due to poor maintenance and business like activities, the parks have been affected by the environmental changes. Planning, management and maintenance of tourism will yield monetary benefits and will also lead to a better environment and protect them from harmful impacts. (Cohen & Amnion, 1994). The government must incorporate certain techniques which will control the problems related to environment and this in turn will reduce the impacts. The available resources can be utilized to maintain the national park in a much better way there by strengthening the resources. The research that was carried out earlier aimed at finding out the problems in Beacon national park as a result of the tourism impact. The impact of tourism on the environment and the study also concentrated on how the management maintains and manages the effects of the impacts. The research also included certain objectives which analyzed the effects of tourism and its related activities on places like national parks. The negative effects of tourism were also examined and the suitable methods were suggested. This was accomplished by conducting several researches and studies. These studies helped in investigating the problems that resulted due to tourism. The survey conducted among the residents of national park exhibited various results. Though certain results were contradictory, the outcome of the survey indicated that tourism will definitely have an impact on the Brecon Beacons national park. The best way to handle the tourism problem

Educational Essay Example | Topics and Well Written Essays - 250 words

Educational - Essay Example Re-design the space to â€Å"provide effective restoration breaks and allow them to return to their work cognitively refreshed†. Today I am discussing on the design redesigning proposal of one of the buildings at the Cities Hall. This is a compute room located within the area. The room needs to be redesigned in respect to the addresses of the students in the educational environment by adhering to the being away, extent, Fascination and compatibility properties in architecture. Since the students have a lot to do at the college, they need refreshment and the computer room will be one of the best places. This is because the room has got computers for the students to be using while resting. It is also one of the best places the students like to hang out at. When redesigning the room, the first thing to do is conceptualize the room fully and perform some testing assumptions. This will go hand in hand with the evaluation of the results then followed by refining the craft of the building. This will begin with the viewing of the placement by redesigning the building by leaving enough spaces for the students to have good indoor and outdoor movements. This includes leaving enough spaces in the building. The design will focus on the properties of Address which entails Being away, Extend, and compatibility. Being away entails a new routine to be used by the students. The extent entails designing the room in order to follow the coherence needed and make the students be familiar with the building. Compatibility will abide with the students’ requirement by fitting and supporting the students. Example is having a place for the students to put their luggages. Under the indoor and outdoor view plan, the design will be well analyzed by the interactions of the students and locating their specific locations likes. Testing of the results will be done by the use of ANOVA testing. The indoor and outdoor of the room will be well analyzed and

Mozart Operas and Pre-Revolution Chinese Operas Contain Surprising Article

Mozart Operas and Pre-Revolution Chinese Operas Contain Surprising Relationship - Article Example Also, the music takes greater importance in these works than the acting or singing, which is obvious in Mozart’s operas, but much less so in Chinese operas. Each of these styles is driven by the music, rather than by the story or even the vocal performances. Finally, both styles of opera have an understated simplicity, making the viewer of the opera believe that he or she could have come up with the plot, which allows for more enjoyment of the music and the experience as a whole. This is not to say that the plots of these operas do not have their complexities, but the basic plot is usually easy to follow, allowing for the casual viewer to simply enjoy the experience. The works of Mozart are widely regarded as some of the greatest in history. Even individuals who do not follow the opera or classical music closely have most likely heard his name and have also heard his music at some point during their lives. What these individuals probably do not know, however, is how politically driven much of Mozart’s work was. An example of this was Mozart opera entitled The Marriage of Figaro, which was originally banned in Vienna because it is a satirical look at aristocracy. Mozart had some very famous battles with the upper class over the course of his career, which got him into trouble because of his volatile personality.

Thunder Heart Essay Example | Topics and Well Written Essays - 1000 words - 3

Thunder Heart - Essay Example Whose City†. The effects of social networking in urban environments for young adults, like the ones seen in the film, can have negative results attributed to them, especially in urban neighborhoods. As seen in the film, young adults would go out to neighborhood hangouts, like a bar or club, to meet people and dance. Such activities can be fun but also be misleading. As seen in the movie, the two young ladies, Maria and Blanca, went to a club just to dance and hangout. They happen to meet some guys who appear to be harmless and a friendship arises. As the friends begin to see each other more often they begin to learn more about one another. This is where misleading networking plays a role. One of the guys met at the bar happens to have associates within a drug ring and is tied to drug smuggling. Soon after, Maria and Blanca become smugglers for their new friends associates. Had the two girls not tried to network with others at the bar they might have evaded this ultimate outcome. Therefore, the n egative effect of social networking in these kinds environments is that people may seem to be one thing but are something quite different. In areas where drug trade is openly visible and common, like the setting in Columbia, social networking can be dangerous. This danger can also be associated in context with control of the urban cities. The danger associated to urban cities is the means of one’s sacrifices for survival. In deprived cities, like the one in the film, money is the most admired commodity. In areas where plantations and industries thrive, workers and laborers certainly do not share the profits attained by these businesses. Workers wages do not meet the bar for providing for their family and ones own personal needs therefore the danger of the drug trade looms. Drug distribution is highly recognized and sought after due to the large

Mozart Operas and Pre-Revolution Chinese Operas Contain Surprising Article

Mozart Operas and Pre-Revolution Chinese Operas Contain Surprising Relationship - Article Example Also, the music takes greater importance in these works than the acting or singing, which is obvious in Mozart’s operas, but much less so in Chinese operas. Each of these styles is driven by the music, rather than by the story or even the vocal performances. Finally, both styles of opera have an understated simplicity, making the viewer of the opera believe that he or she could have come up with the plot, which allows for more enjoyment of the music and the experience as a whole. This is not to say that the plots of these operas do not have their complexities, but the basic plot is usually easy to follow, allowing for the casual viewer to simply enjoy the experience. The works of Mozart are widely regarded as some of the greatest in history. Even individuals who do not follow the opera or classical music closely have most likely heard his name and have also heard his music at some point during their lives. What these individuals probably do not know, however, is how politically driven much of Mozart’s work was. An example of this was Mozart opera entitled The Marriage of Figaro, which was originally banned in Vienna because it is a satirical look at aristocracy. Mozart had some very famous battles with the upper class over the course of his career, which got him into trouble because of his volatile personality.

Relapse Prevention Plan Essay Example | Topics and Well Written Essays - 250 words

Relapse Prevention Plan - Essay Example The initial procedure for early relapse prevention that Jed should use is as follows: he should recognize that he is undergoing an emotional relapse that is changing his behavior; he should also recognize that he is isolating himself and therefore he should ask for help. Nonetheless, Jed should understand that he is anxious and should employ new relaxation techniques (Addictions and Recovery.org, 2012). Consequently he should recognize that his eating and sleeping habits are deteriorating and practice good self-care. Prolonged emotional relapse will make him exhausted which might prompt him to go back to drinking; this will result into mental relapse (Melemis, 2012). The only way to avoid relapse is that he should take good self-care, and if he cant, he should ask for help. Whenever he feels a drinking urge he should call a friend, a support, or someone in recovery and share what he is undergoing. The moment he shares his feelings, the urge will automatically disappear (Clarkson,

Homosexuality Essay Example for Free

Homosexuality Essay Homosexuality within the church is a controversial matter that is threatening to break apart the over 20-century-old institution of the church. This paper sets out to demonstrate that, Homosexuality within the church and the society is a controversial matter that is yet to be resolved. With particular emphasis with the teachings of the Catholic tradition on Homosexuality, the paper seeks to analyze how Homosexuality has for the entire history of the Catholic tradition threatened to divide the church. The paper also will take a view of Homosexuality in today’s society in a bid to compare and contrast how modern society views on Homosexuality differ from the teachings of the church and the reasons behind the church’s rather conservative approach to the Homosexuality issue. The Catholic church was founded around 2nd century at a time when church and state were inseparable and the church yielded much influence over state affairs and governance. With particular reference to Roman empire, the Catholic church in Rome came to be so powerful that church law determined state’s laws and the papacy was responsible for the running of not only the church affairs, but also of the state affairs. So much was the influence of the Catholic Church leadership on state governance that, church leaders were powerful and revered because they could exert political and religious authority. The issue of Homosexuality within the Catholic Church is not new and as early as the 5th century, there is evidence to the fact that, the issue had come up often in church doctrine and it had been discussed at the highest level of the church. Homosexuality according to the Catholic tradition is evil and not permissible. Indeed, the Catholic tradition holds that those who engage in Homosexuality should be excommunicated from the church, a punishment that is not revertible and rarely does the church leadership give audience to those viewed to be disobedient to the Catholic stance on Homosexuality. According to Catholic tradition, a union between a man and a man or between a woman and a woman is seen and therefore, it is contravention to the church teachings. As a result of the position the church has maintained for centuries, the issue of Homosexuality in the church continues to elicit emotional debates and is currently one of the most controversial issues in the Catholic Church especially the Catholic Church in USA. Rather than amend the existing church doctrine, to reflect modern society, and particularly the newfound freedom amongst the youth in America, the church continues to make key amendments to its dogmatic teachings, which continue to depict the church as old-fashioned, insensitive and non-responsive to modernity. The number of youth attending church in the USA has been found to have declined by upto 30% in the past few decades. This is reflected by the fact that, there are fewer Americans willing to take up leadership positions in the church causing a major shortage of father, nuns, etc. in the church. Although Homosexuality as an issue is not solely to blame for the current standoff, it is evidently a contributing factor to the leadership crisis the church is facing and the inability of the church to attract young people to participate in church leadership. Their lax evidence and substantial research in the causes of the church’s conservative position, which inspite of being challenged by scholars in the church and the faithfuls has remained perpetually undeterred and continues to maintain the hard position it has taken for the past centuries. In sharp contrast to the position taken by the clergy, there is growing evidence that a gay culture is slowly gaining root amongst the clergy something, which is proving to be magnanimous and one of the latest scandal in the Catholic church . This has had an impact on values that the church has continued to teach including family values that the church bases as its key argument against ratification of Homosexuality within the church. Although it is hard to say for sure how many Catholic clergy are involved in Homosexuality, going by the number of those who come out in the open and defiantly state their support of Homosexuality, it is clear that there are significant numbers of clergy engaging in Homosexual practices, promoting Homosexuality as well as openly or silently advocating for Homosexuality . This has left the church leadership in a dilemma as it has become very difficult for a common ground to be struck between proponents and opponents of Homosexuality in the church. What started as deliberations to examine how the church could respond to Homosexuality and its growing influence in the face of organized homosexual groups, which started getting rights to marriage as well as other rights, guarding from discrimination has put the Catholic church especially in the USA at crossroads. As a result of the raging debate, the media sought to focus attention on the issue of Homosexuality and how the church was responding to it leading to numerous reports accusing cardinals in the USA of engaging in Homosexuality. This has further been complicated by the fact that whenever Homosexuality debate has come up, the issue of pedophilia has come up . This has further complicated the Homosexual debate in that it gives the Homosexual debate a negative image in the public given that pedophilia is a sensitive issue equitable to crime. Homosexuality in the Catholic Church is so complex that, the independence given to cardinals has made it virtually impossible even for victims of Homosexuality perpetrated by the clergy to successfully wage complaints. For instance, clergy collaborate with their superiors to perpetrate Homosexual behaviour to young boys and instead of such clergy being punished when the matter comes out in the open, it is often the victims and their families who suffer most. Indeed, in many cases, members of the church are more likely to quit church because the only way out is to avoid confrontation with the church. This has further been complicated by the fact that, the church has been rather unwilling to acknowledge that Homosexuality is a problem within the church something which means that whenever such accusations are raised against the church leadership, the church is less willing or not devoted to dealing with the problem of Homosexuality. In most cases, the ‘offenders’ receive light punishments such as transfer and rarely has any meaningful punishment been referred against clergy by the church. This indifference from the church leadership has continued to taint the church’s image especially considering that there is a general lack of understanding and appreciation of Homosexuality amongst church faithfuls. That the Catholic Church traditionally believes Homosexuality is a sin, is evidenced by the constant pleas and calls for repentance the church sends out to self-confessed Homosexuals. Indeed, there is a clear difference between Homosexuality as practiced in the church and Homosexuality as practiced in the society. The matter is further complicated by the fact that, traditional Catholic beliefs do not allow members of clergy to marry or engage in sexual intercourse leave alone Homosexuality. Therefore, Homosexuality in the church circles is viewed as clerical abuse and is treated as such. There is enough evidence towards the fact that, the church is willing to fight on and totally ban Homosexuality in the church and especially within the clergy. However, the church is faced with a dilemma in that, it does not support the concept of Homosexuality. As such, the church leadership is in a state of denial, which seeks to present the church as devoid of Homosexuality but at the same time, wants to fight incidences of Homosexuality if and when reported. Although in some cases those accused of Homosexuality have been forced to resign, such calls come from the faithful and tend to be grounded on threats of charges and not as a contradiction of traditional teachings or church dogma considering that the church is reluctant to acknowledge that even within its clergy the problem of Homosexuality is rife. Outside the US, resistance to Homosexuality in the church is higher compared to US where in some cases, some archdioceses have the leeway to choose whether to work with Homosexuals or not. This is bringing a new dimension into the Homosexuality debate in regard to celibacy and a call for further scholarly interpretation of celibacy as understood in the Catholic Church . It is not surprising that the issue of Homosexuality in the church has never been comprehensively dealt with despite the fact that, Homosexuality in the church has been practiced since the 1970s upto present and evidently with the knowledge of the church leadership . Another dimension that the Homosexuality debate has taken in the church is questioning of how effectively Homosexual clergy are capable of guiding the faithful. The fact that Homosexuality is still considered by many Catholics as sin and violation of their traditional beliefs brings a dilemma to the clergy who are Homosexuals and is a common cause of conflicts. This has led many to question the ability of those who violate church teachings to lead the faithfuls who hold different points of view on Homosexuality. Indeed, this has brought about an ethical dimension to the Homosexuality debate in the church. While the proponents of Homosexuality call for relaxation of traditional teachings on celibacy, opponents of Homosexuality call for chastity and upholding of traditional teachings on sexuality as handed down by generations . Evidently, Homosexuality in the church has started to take a new dimension, that of civil liberties and civil rights. In this regard, there are those who want to bring the human rights issue into the Homosexuality debate and look at the church’s stance on Homosexuality as a violation of civil liberties and civil rights. This dimension has been criticized due to the fact that, the church is an independent institution whose doctrine is out of state control and therefore, compelling the church to accept Homosexuality as an attempt to guarantee civil liberties and civil rights, has in the past failed to yield into results. Therefore, while some liberals view Homosexuality as an orientation and something to be left to the choice of an individual, others view the church and indeed the Christian faith as dominant when it comes to individual choices and therefore, this implies that once one accepts membership into the church, individualism is less important and collectivity is emphasized. If what is happening in other denominations such as Evangelicals and Anglicans is anything to go by, Homosexuality in the church will continue to be a contentious issue and the solution lies in the granting of independence to churches to make individual decisions on how to conduct the Homosexuality debate. Indeed, nothing has in the recent history of the church been so hard to strike a common position on, as has been with the case of Homosexuality. Efforts by the church to transform Homosexuals through methods such as therapy in form of Bible teachings, have failed and that too has been considered as interference in civil liberties and civil rights of individuals. Therefore, asking homosexuals to change their sexual orientation has greatly failed and it seems that the homosexuals are gaining ground in the church and are swelling in numbers. If current estimates of homosexuals in the church today are anything to go by, the Catholic Church may find it difficult to contain the ‘homosexual movement’ and it is the high time that a multidimensional approach to the Homosexual debate is adapted with an aim of bringing together conservatives and liberals to strike a common ground. Even the involvement of scriptural interpretation has failed to yield into meaningful results as different groups have interpreted the issue differently. Therefore, the Biblical standpoint has ceased to be what guides the debate on Homosexuality and the church and evidently civil rights and civil liberties dimension together with emotive dimension is what is taking prominence in the debate about Homosexuality in the church. In conclusion, the view of Homosexuality in the contemporary society is as controversial as it is the case in the church. However, since the moral standards in the contemporary society compared to the moral standards set by the church are significantly different, homosexuals have received insignificant resistance in the civil society than has been the case in the church. That modernity has influenced the way modern society has welcomed Homosexuality is for sure but the teachings of the church have failed to incorporate the views of the same society that it purports to serve. This has resulted into a conflict that persists between the church and the modern society something, which will be resolved when the church will amend its teachings to reflect the modern society standpoint. There is a need for more scholarly studies geared towards establishing a common ground between opponents and proponents of Homosexuality with a view of diffusing the standoff between those who support a more tolerant church position on Homosexuality and those who are opposed to a more inclusive position on Homosexuality in connection to the church. There is a need for the Catholic Church to review its training programs for clergies in a bid to deal with the problem of clergy engaging in abusive behaviour that has resulted into conflict of interest and lack of harmony in the church. It is no doubt that, the society expects the church to be a model in as far as moral standards are concerned, and therefore, when clergy are accused of engaging in Homosexuality, which is in the first place against the official position of the church, doubts arise about the church’s teachings on Homosexuality.

Internet Protocol Version 6 (IPv6) Analysis

Internet Protocol Version 6 (IPv6) Analysis Overview Internet Protocol version 6 (IPv6) is the next generation of protocol defined by InternetEngineering Task force (IETF) to replace the exiting IPv4 protocol. At present, the majority of Internet users are still using IPv4 protocol, and given that most of current networking applications and network equipment run in IPv4 environments, the migration from IPv4 to IPv6 cant be accomplished overnight. It is predictable that the migration will be a long-term process (it is forecasted that the process will take 10 20 years). During the migration, IPv4 and IPv6 will coexist in a same network. This migration process poses new challenges on the routers that are the core equipment in IP network. Traditional routers cant accommodate new future network with IPv4/v6 coexistence. The routers must be improved and upgraded so that they can support both IPv4 and IPv6.Given that the core router is very important and carries huge Internet traffics, it must be able to support IPv6 forwarding at wire rate. It means ASIC chip, but not software is used to support IPv6 packet processing. At the same time, it is very important that this support cant sacrifice any IPv4 performance. After all, most of current traffics is IPv4. The core router must expand to support IPv6 routing tables and needs to support IPv6 routing protocols, such as BGP4+, OSPFv3, ISISv6, RIPng and etc. It needs to support some migration strategy from IPv4 to IPv6, such as Tunnel, Dual Stack, Translation and etc. Same as many network technologies, successful deployment of IPv6 relies on the deployment of the operators IPv6 network. As one core component in IPv6 network, IPv6 core router is key to network building, applications, performance and stability. At present, mainstream router vendors like Cisco and Juniper announce that their routers can support IPv6 while some traditional IT equipment manufactures, especially those in Japan, think Internet upgrade caused by IPv6 will change the whole landscape of router market, which brings significant opportunities for them to enter router market. From 2000 to 2002, Hitachi, NEC and Fujitsu announced IPv6-capable core router to gain some market share in new Internet network. It must be admitted that IPv6 is still in the initial phase at present, which is reflected in the following aspects: most IPv6 network is in trial phase, the number of access users is low, carried IPv6 traffics cant be comparable to IPv4, the interoperability between IPv6 equipment still needs to be proved, and network engineers lack in experience in large-scale deployment and operation of IPv6 network. The lack of data and experience is one of important causes that make some operators lack in confidence in IPv6 network deployment. Many operators take wait-and-see attitudes. In order to prove IPv6 router (especially IPv6 core router), the support to IPv6, how are they performed and interoperated, provide a practical data basis for the operators to deploy IPv6 network and provide a reference for equipment manufactures to evaluate and improve their equipment, BII(Beijing Internet Institute) collaborate with 6TNet (IPv6 Telecom Trial Network) in China tested IPv6 core routers from 4 ven dors (Fujitsu, Hitachi, Juniper and NEC) in Beijing from October to December 2002. BII performed protocol conformance, performance and  interoperability tests. In these tests, we used the test instruments provided by Agilent and received strong technical support from Agilent. The test is not a comparative performance test in different router vendors. The purpose is to verify the feasibility of IPv6 deployment. With this test, the test team thinks that all SUT (system under test) has the ability to support commercial IPv6 network and provide basic IPv6 capabilities. They can support IPv6 routing protocols, support the forwarding of IPv6 datagram at wire rate and provide interoperability between them. From perspectives of pure technology, the test team thinks the products have been ready to deploy basic IPv6 core network.. Brief Descriptions of Test The requirements for hardware provided by the SUT (system under test) are as follows: IPv6-capable core router OC48 SM ports (both ports must be in different boards) Supports both FE ports and GE ports. The number of FE ports and GE ports is no less than 3 Finally, all vendors basically meet those requirements, although CX5210 provided by NEC doesnt support FE during the time of testing. The requirement for IPv6 capabilities provided by the SUT (system under test) include: support of IPv6 forwarding in hardware and support of related IPv6 routing protocols and migration strategy. Finally, all vendors meet our requirements as shown in the following table. Company IPv6 hardwareDual Stack RIPng OSPFv3 BGP4+ IPv6 over IPv4 forwarding Tunnel Fujitsu 9 9 9 9 9 9 Hitachi 9 9 9 9 9 9 Juniper 9 9 9 9 9 9 NEC 9 9 9 9 9 9 The SUT (system under test) models and OS versions are shown in the following table. Company Model Version Fujitsu Geostream R920 E10V02L03C44 Hitachi GR2000-20H S-9181-61 07-01 [ROUTE-OS6] Juniper M20 5.5R1.2 NEC CX5210 02.0(2e) 45.08.00 The test instruments we used in the test are as follows: Agilent Router Tester 900 Version: Router Tester 5.1,Build 11.15. Agilent QA Robot Version: Router Tester 5.3,Build 5.2 The IPv6 core router test is composed of three parts: Protocol conformance test, interoperability test and IPv6 performance test. Basic IPv6 Protocols and RIPng Basic IPv6 protocols include IPv6 Specification (RFC2460), ICMPv6 (RFC2463), Neighbor Discovery (RFC2461), Stateless Autoconfiguration (RFC2462), Path MTU Discovery (RFC1981), IPv6 address Architecture (RFC1884) and etc., which are basic capabilities provided by an IPv6 implementation. RIPng is defined by RFC2080 and is the extension and expansion of RIPv2. Its basic capabilities are same as RIPv2. The routing information exchanged by RIPng can carry IPv6 addresses and prefixes. RIPng runs on IPv6 network, uses multicasting address ff02::9 as destination to transfer routing information. RIPng is not compatible with RIPv2. RIP protocol is typically used in small networks and is not deployed in large networks because of its scalability and performance, which is same in IPv6 networks. The test does not include basic IPv6 protocols and RIPng because we think both capabilities are most basic and most preliminary capabilities that should be provided in an IPv6 router, these capabilities are implemented and interoperated very well in the routers from 4 vendors, and the 4 tested routers have been tested publicly or non-publicly several times in different occasions and provided good data. Therefore, we think it is unnecessary to make efforts to repeat these work and we skipped this test and focused on more challenged test items. BGP4+ Protocol Conformance Test At present, the external gateway protocol used in the IPv4 network is BGP4. Its basic protocols are defined in RFC1771. In order to carry IPv6 network information in BGP4 updates, IETF has defined a special property multi-protocol BGP (MP-BGP), also called IPv6 NLRI (Network Layer Reachability Information) to exchange IPv6 routing information, which is not a new version of BGP protocol, but an extension to BGP4. The extension is generally called BGP4+, which is compatible with BGP4. Refer to RFC2545 for its definition. Test Purpose and Used Standards: Purpose: To test the implementation of BGP4+ and conform with related standards for SUT (System Under Test). The following standards are referred in the test: Bates, T., Chandra, R., Katz, D. and Y. Rekhter, â€Å"Multiprotocol Extension for BGP-4†, RFC 2858, Jne 2000. Bates, T., Chandra, R., Chen, E., â€Å"BGP Route Reflection An Alternative to Full Mesh IBGP†, RFC2796, April 2000. Chandra, R. and J.Scudder, â€Å"Capabilities Advertisement with BGP-4†, RFC 2842, May 2000. Dupont, F. and P. Marques, â€Å"Use of BGP-4 Multiprotocol Extensions for IPv6 Inter-Domain Routing†, RFC 2545, March 1999. Rekhter, Y. and T. Li, â€Å"A Border Gateway Protocol 4 (BGP-4) †. Traina, P., McPherson, D., Scudder, J., â€Å"Autonomous System Confederations for BGP†, RFC3065, February 2001. Test Methods: All the tests are based on topology emulation. One test port of instrument firstly establishes network topology emulation, then executes pre-written scripts, interacts with the port of SUT, performs related BGP4+ protocol tests individually and each test generates Passed/Failed record. The tests can be divided into active tests and passive tests. Active test means the tester is used to verify the state machine of SUT and the correctness of message format while passive test means the tester is used to interfere with SUT using messages with errors. Test Topology Test instrument and SUT use two independent Fast Ethernet or Gigabit Ethernet connections. All BGP4+ runs on the Fast Ethernet or Gigabit Ethernet connections. The physical topology is as follows: The logical topology is as follows: Test Items and Descriptions of Test Results: The BGP4+ protocol conformance test involves in the BGP multi-protocol extension, setup and transfer of BGP4+ IBGP and EBGP sessions, ability to receive IPv6 route updates, BGP4+ next hop, starting point, MED, local preference, AS_PATH, atom aggregation, community name and various properties, the ability of SUT to correctly process these properties, BGP4+ route reflector capability, BGP4+ federation capability. These tests can only ensure implementation of BGP4+protocol in SUT comply with the standard defined by RFC, and cant ensure SUT fully and successfully deploy BGP4+ routes in commercial IPv6 network. The following diagram briefly describes the test results. Attached table 1 includes all test items, description and detailed results of BGP4+ conformance tests for 4 routers. The test items and descriptions are extracted from RFC2858, RFC2545, RFC2842, RFC2796, RFC3065 and draft-ietf-idr-bgp4-14.txt part. Model Failed test items Fujitsu GeoStream R920 2 Hitachi GR2000-20H 5 Juniper M20 1 NEC CX5210 3 Analysis of Test Results: Capabilities not supported Confederation Route reflector, Community Fujitsus GeoStreamR920 of current version does not support BGP4+ federation capability. In all BGP4+ test items it supported, the general performance is fairly good. What needs to be improved is only one item that is to support the migration of undefined property and handle interim duration. It is hoped to improve null interface which cant support next hop at present. Hitachis GR2000-20H of current version supports all test items, and is only product fully supporting BGP4+ protocols in the core routers from 3 Japanese companies. However, it needs to be improved in the following areas: handling next-hop property of IBGP in BGP4+ protocol, using AS_PATH properties to prevent from route loop, the ability of route reflector to detect ORIGINATOR_ID. At the same time, we found in the interoperability test that GR2000-20H cant establish non-physical direct-connection sessions with IBGP peering entities, which Hitachi needs to improve. It is hoped to add loopback address capability. Junipers M20 passes all tests except one item excellently. NECs CX5210 of current version doesnt support BGP4+ route reflector and community properties. In all BGP4+ test items it supported, the general performance is fairly good. However, it needs to be improved in handling BGP4+ federation AS_CONFED_SEQUENCE property. It is hoped to add null interface configuration. Interoperability Test As above mentioned, IPv6 is in initial phase of commercial deployment at present. A large amount of IPv6-capable network equipments and terminals are available. IPv6 network built by the operators doesnt only use the equipment provided by a vendor. In multi-vendor network environment, the interoperability between equipment is vital. The interoperability test is composed of BGP4+ interoperability test and OSPFv3 interoperability test. It should be noted that specific items in the interoperability test only cover some most common properties of BGP4+ and OSPFv3, and are not the interoperability tests of all properties of BGP4+ and OSPFv3. BGP4+ Interoperability Establish IBGP Sessions Test Descriptions: The test is to verify GR2000-20H, CX5210, R920,M20 and fully meshed iBGP connections that can be established. Reference: RFC1771, RFC2545 and RFC2858. Test steps: GR2000-20H, CX5210, R920, M20 and SUT are connected as shown in the following diagram. 4 routers are in a same autonomous domain and are interconnected using IBGP protocol to form a full-meshed IBGP connection. Test instrument and SUT are interconnected using EBGP connection. Because GR2000-20H doesnt support IBGP across-router Session connection, we use a FE link to connect GR2000-20H to M20 to form a fully-meshed connection. Test Results: We verified whether iBGP sessions were established between GR2000-20H, CX5210, R920 and M20, and it was found all connections were set up successfully. GR2000-20H CX5210 R920 M20 GR2000-20H N/A OK OK OK CX5210 OK N/A OK OK R920 OK OK N/A OK M20 OK OK OK N/A EBGP- Route Advertisement Test Descriptions: To verify GR2000-20H, CX5210, R920 and M20 can advertise routes properly in a fully meshed networks. References: RFC1771, RFC2545 and RFC2858. Test steps: Establish network topology according to previous test, establish eBGP connection between tester and SUT, send 100 EBGP routes from tester to SUT. Results: We verified whether GR2000-20H, CX5210 and R920 and M20 routing tables were correct, and it was found all routing tables were correct. GR2000-20H CX5210 R920 M20 GR2000-20H N/A OK OK OK CX5210 OK N/A OK OK R920 OK OK N/A OK M20 OK OK OK N/A Establish EBGP Sessions Test Descriptions: The test is to verify GR2000-20H, CX5210, R920 and M20 can establish a fully meshed eBGP connections. Reference: RFC1771, RFC2545 and RFC2858. Test steps: GR2000-20H, CX5210, R920 and M20 are connected as shown in the following diagram. Test Descriptions: We verified whether EBGP sessions were established between GR2000-20H, CX5210, R920 and M20, and it was found all connections were established successfully. GR2000-20H CX5210 R920 M20 GR2000-20H N/A OK OK OK CX5210 OK N/A OK OK R920 OK OK N/A OK M20 OK OK OK N/A EBGP Route Advertisement Test Descriptions: To verify GR2000-20H, CX5210, R920 and M20 can advertise EBGP routes properly. References: RFC1771, RFC2545 and RFC2858. Test steps: Establish network topology according to previous tests, send routes from each router to all other routers. Test Results: We verified whether GR2000-20H, CX5210 and R920 and M20 routing tables were correct, and it was found all routing tables were correct. GR2000-20H CX5210 R920, M20r GR2000-20H N/A OK OK OK CX5210 OK N/A OK OK R920 OK OK N/A OK M20 OK OK OK N/A OSPFv3 Interoperability OSPF protocols supporting IPv6 is OSPFv3. OSPFv3 routing mechanism is basically same as OSPFv2. However, OSPFv2 relies primarily on IPv4, while OSPFv3 makes many improvements in OSPFv2 and is not a simple extension, thus OSPFv3, whose corresponding protocol is RFC2740, runs on IPv6. For real world applications, many operators regard OSPFv3 as a brand new protocol, also its stability and maturity need to be further verified, so when IPv6 routing protocols are selected, it tends to use IS-ISv6 (draft-ietf-isis-ipv6-02.txt), which is only a simple extension to IS-ISv4 (RFC1195) (2 TLVs re-defined) and does not make changes fully. However, it is sure the opinion is not authoritative and need to be proved. Because of the limitations of test instrument, It is required for SUT to provide 100M Ethernet interface. As CX5210 does not support Ethernet interface at present, just M20, R920 and GR2000-20H were involved in the testing. However, it does not imply that CX5210 cant interoperate with other 3 routers and has any problems with functions implementation. In the test, GR2000-20H is called SUT1 in short, M20 is called SUT2, and R920 is called SUT3. Establish OSPF Connections DR Election Test Descriptions: In the initial status, set different OSPF priority levels for SUT1, SUT2, SUT3 and the test instrument (10, 8, 5, 0). Connect these equipments based on the network topology below. Verify SUT1, SUT2, SUT3 and test instrument to establish OSPFv3 adjacency and vote DR/BDR. After DR/BDR is established properly, put DR off the network, and check whether DR/BDR is established properly. Put off-net equipment on the network, and check whether DR/BDR is established properly. Change OSPF initialization priorities of SUT1, SUT2, SUT3 and test instrument, and implement new test from step 2. Repeat the tests for 4 times, and ensure each SUT and test instrument have one opportunity to be selected as DR and BDR under the intial status. During the test, all SUTs are in the same OSPF Area 0. Reference: RFC2740 Test Results: During the testing, all the OSPF adjacencys can be established between SUTs and DR, also BDR can be elected properly. After DR is off-line, BDR can be re-elected as DR and the one with sub-top priority will be BDR. When off-line equipment is on-line again, no re-electing process occurs. All test results comply with the requirements in related standards. Exchange LSA Database Test Descriptions: Test instrument simulates an internal network with 4 routers connected, and sends the routing information to SUT. Then verify the routing information received by SUT DR from test instruments will be sent to DR Other correctly. Same as the previous test item, firstly SUT1 is used as DR, then SUT2, and finally SUT3. Reference: RFC2740 Test Results: During the testing, OSPF adjacency can be established properly between all SUTs. DR receive LSA information from test instrument and properly send the information to DR Other, which can also receive and process LSA information properly. IPv6 Performance Test The major approach used for the performance testing was to send the IPv6 traffic with different packet sizes and specific QoS information, via SUT to the destination, and then by the tester measure the throughput, latency and packet loss of SUT in various topologies. For the IPv6 performance test, there are four vendors high-end IPv6 routers, with OC-48 POS ports on which throughput and latency will be measured, with IPv6 packet sizes of 64 bytes, 128bytes, 256 bytes, 512 bytes, 1024 bytes, 1480 bytes and 1500 bytes. The performance in various of circumstances were measured, including IPv4/IPv6 mixed traffics (IPv4 and IPv6 traffics with different ratio), IPv6 traffic with packet sizes mixtures, Sweep Packet Sizes. Also the maximum routing table entry supported and the performance on manually configured tunnels were verified. Most of the referred standards is extracted from RFC2544. At present, there are deficient applications for IPv6, and the number of users in the IPv6 network can not be compared to IPv4. The sum of maximum IPv6 of IX(Internet eXchage) traffics is less than dozens of Mbits/s. These traffics can be handled using a router refitted from a PC. Based on the circumstance, is it necessary to test the performance of OC48 ports ? Actually when the operators build IPv6 network and purchase IPv6 routers, todays IPv6 network is not under their consideration. Their networks should be able to deal with the changes and growth of IPv6 network next 5 7 years. In this sense, it is necessary for IPv6 core router to support the IPv6 traffic forwarding capacities at wire rate. Otherwise, what differences can be made between a real IPv6 router and a router refitted from a PC with installed BSD and Zebra ? The measurement of the number of routing table entry also meets the same situations. At present, therere around 300-400 entries in the IPv6 backbone router routing table, which cant compared to the huge number of IPv4 (110,000 ¼Ã‚ 130,000 routes). Secondly, IPv6 has drawn experience and lessons from IPv4 in design and address assignment. RIR only assigns the large block and fixed length IPv6 addresses to IPv6 operators, instead of the end users. To some extent, this can protect IPv6 routing tables from the explosive growth. The strict prefix filtering mechanism was set on BGP4+ routers by most of IPv6 network administrators and the router only allows minor prefixes, such as /16, /24, /28, /32, /35 and etc. However, the experience of IPv4 teach us a lesson- â€Å"Money Talks!†. In the fiercely competitive ages, it is very difficult for operators to reject users requirements. Under the conditions that IPv6 doesnt solve the problems of Multi-homing completely, it is possible that the network operators are required to broadcast users network prefixes into global IPv6 routing tables in order to achieve Multi-homing applications. So far RIR has begun to assign /48 ad dress segment to IPv6 of IX independently, while it is suggested IX doesnt broadcast the addresses. Thirdly, in many IPv6 networks, there are at least two IPv6 addresses segments, from 6BONE(3ffe::/16) and RIR(2001::/16) respectively, and maybe more prefixes will appear in the future. Fourthly, RIR cant ensure IPV6 addresses assigned to IPv6 operators are from a continuous address block. Current assignment policy indicates that /32 addresses of IPv6 assigned to operators can be continuously extended to /29. If new addresses are further required, they must be assigned to discontinuous address blocks and result in the growth of the number of routing tables. To sum up, the test team suggests that the number of IPv6 routing tables supported by the router should be no less than that of IPv4 routing tables, since it is very difficult to estimate the increasing number of routing tables of IPv6 core network right now. In current IPv6 networks, commercial IPv6 network and IPv6 trial network (6BONE) are interlaced without a explicit boundary between them. A packet from commercial IPv6 network may go through many IPv6 trial network before arriving at another IPv6 network. The network administrators of many trial networks are not regarded as a â€Å"operators†, but a â€Å"players† It is pretty unstable of their networks, with routers reset very frequently. In the meantime, the networks advertise global IPv6 routes to all peers, making their own IPv6 network to implement transit. It causes the instability of current IPv6 of BGP routes, and thus it is required the capabilities of IPv6 routers cover the flapping and convergence properly, which should be included in this test, however due to limited test time frame, it is a pity the test team has to give up these tests. The network topology used for the performance test is shown as following: Ideally, the test topology should be as following, so that the packet forwarding capability of the routers in real-world network environment is shown completely. Send one traffic from a source port of the tester, via multiple ports of the router to the destination ports of tester, measure the performance of the router. However as the vendors cant provide enough OC48 ports, the test team can only perform the test by simply sending packets from one port and receiving packets form another port. In this sense, this test environment cant simulate completely the performance of the router in the real-world network environment. The Measurement of Throughput and Latency with Different IPv6 Packets Sizes at OC-48 POS port Test Descriptions: To test the maximum IPv6 packet forwarding rate of SUT with zero packet loss with different IPv6 packet sizes. Test Methods: Send IPv6 packets, via SUT to the destination ports of the tester, which measures the packet rate of SUT according to the received IPv6 packets. Set the initial offered load to 2%, and If no packet loss occurs, increase the offered load to 100% and repeat the test. If packet loss occurs, decrease the offered load to (100%+2%)/2=51%, repeat the test again†¦Ã¢â‚¬ ¦In a binary search manner, continue to increase or decrease the offered load in subsequent iterations until the difference in offered load between successful and failed tests is less than the resolution for the test. This is the zero-loss throughput rate. Traffic forwarding mode: full duplex. Offered Packet type: IPv6; Offered Packet size (bytes): 64 128 256 512 1024 1480 1500 Test duration of each packet type(s): 5 Bandwidth resolution (%): 0.1 Line BER tolerance (10^_): -10 The results are as follows: Sustainable Throughput of OC-48 POS Port 105.00% 100.00% 95.00% 90.00% 85.00% 80.00% 75.00% 70.00% 65.00% 60.00% 55.00% 50.00% 64 128 256 512 1024 1480 1500 bytes bytes bytes bytes bytes bytes bytes Test Packets Size Average Latency (us) at Variable Test Packets Size 100 90 80 70 60 50 40 30 20 10 0 Test Packets Size Hitachi NEC Fujistu Juniper Hitachi NEC Fujistu Juniper Note: About inherent latency of tester Before we perform tests, we must consider intrinsic latency of tester. The following table indicates inherent latency of tester for different test packet sizes when sending 100% offered load. Inherent latency of tester (100% offered load) Packet Size (bytes) 64 128 256 512 1024 1480 1500 Average Inherent 2.74 2.69 2.69 2.65 2.65 2.60 2.60 Latency (us) From the above, the inherent latency of tester under different packet sizes is about 2.7us. Compared to the tens of us of SUTs latency, there are not significant impacts on the test results. In addition, the impact of inherent latency is fair to these 4 SUTs. Forwarding Performance of IPv4/IPv6 Packets on OC48 Ports Test Descriptions: To verify the performance of SUT to forward IPv4/IPv6 packets in offered packets sizes. The test requires SUT to support IPv4/IPv6 dual protocol stacks. Test Methods: The tester sends IPv4 and IPv6 traffic simultaneously in full duplex configuration, via SUT to the destination port, measure the throughput and latency with various ratio of IPv4 and IPv6 traffic. Send traffic with 50% of IPv4 and 50% of IPv6 and 100% offered load first time. If packet loss occurs, decrease the offered load in 5% resolution until the difference in offered load between successful and failed tests is less than the resolution for the test. This is the zero-loss throughput rate. At the same time, measure the latency at maximum forwarding rate. Then change the ratio of IPv4 and IPv6 traffic to test again. Increase continuously the proportion of IPv6 traffic to simulate the change of traffic characteristics in the real-world network transition. Test Descriptions: Offered load (%): initial100% with 5% increment and final 0 Offered packet types: IPv6 Percentage of IPv4 and IPv6 traffic: 50:50—10:90 (IPv4:IPv6) Offered packet size (bytes): 62 512 1518 Test duration of each packet size(s): 5 The test results are as follows: Sustainable throughput of OC-48 POS port at packet size 64 bytes with different percentage of IPv4 and IPv6 traffic Sustainable Throughput of OC-48 POS Port at Packet Size 64 bytes with different Percentage of IPv4 and IPv6 Traffic 105% 100% 95% 90% 85% Hitachi 80% NEC 75% Fujistu 70% Juniper 65% 60% 55% 50% 50/50 40/60 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Sustainable throughput of OC-48 POS port at packet size 512 bytes with different percentage of IPv4 and IPv6 traffic Sustainable Throughput of OC-48 POS Port at Packet Size 512 bytes with different Percentage of IPv4 and IPv6 Traffic 105% 100% 95% 90% 85% Hitachi 80% NEC 75% Fujistu 70% Juniper 65% 60% 55% 50% 50/50 40/60 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Sustainable throughput of OC-48 POS port at packet size 1518 bytes with different percentage of IPv4 and IPv6 traffic Sustainable Throughput of OC-48 POS Port at Packet Size 1518 bytes with different Percentage of IPv4 and IPv6 Traffic 105% 100% 95% 90% 85% Hitachi 80% NEC 75% Fujistu 70% Juniper 65% 60% 55% 50% 50/50 40/60 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Average latency (us) at test packets size 64 bytes with different percentage of IPv4 and IPv6 traffic Average Latency (us) at Test Packets Size 64 bytes with Different Percentage of IPv4 and IPv6 Traffic 100 90 80 70 60 50 40 30 20 10 0 50/50 40/6 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Hitachi NEC Fujistu Juniper Average latency (us) at test packets size 512 bytes with different percentage of IPv4 and IPv6 traffic Average Latency (us) at Test Packets Size 512 bytes with Different Percentage of IPv4 and IPv6 Traffic 100 90 80 70 60 50 40 30 20 10 0 50/50 40/60 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Hitachi NEC Fujistu Juniper Average latency (us) at test packets size 1518 bytes with different percentage of IPv4 and IPv6 traffic Average Latency (us) at Test Packets Size 1518 bytes with Different Percentage of IPv4 and IPv6 Traffic 100 90 80 70 60 50 40 30 20 10 0 50/50 40/60 30/70 20/80  Ã‚  Ã‚  Ã‚   10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Hitachi NEC Fujistu Juniper IPv6 over IPv4 Configured Tunneling Performance of OC-48 POS Port Test Description: Tunneling technology is an effective means to connect separate IPv6 networks via IPv4 backbone. This item is to verify the performance of SUT when SUT encapsulates IPv6 data packets into IPv4 payload and forwards the packets. Test Method: The tester sends IPv6 data packets to SUT, and configures an IPv6 over IPv4 tunnel between SUT and the tester. Thus after SUT receives pure IPv6 packets from the tester, it will encapsulate it into IPv4 packet payload, and send IPv6 packets to destination over IPv4 network. The tester analyzes the packets forwared by the SUT at receiving end, calculates the throughput of SUT for different sizes of packets under the IPv6 over IPv4 configured tunnel. Test Results: IPv6 packet size: 512 Destination address of sending IPv6 data packets: 3FFE:0:0:4::2/64 Bandwidth range of sending IPv6 tra Internet Protocol Version 6 (IPv6) Analysis Internet Protocol Version 6 (IPv6) Analysis Overview Internet Protocol version 6 (IPv6) is the next generation of protocol defined by InternetEngineering Task force (IETF) to replace the exiting IPv4 protocol. At present, the majority of Internet users are still using IPv4 protocol, and given that most of current networking applications and network equipment run in IPv4 environments, the migration from IPv4 to IPv6 cant be accomplished overnight. It is predictable that the migration will be a long-term process (it is forecasted that the process will take 10 20 years). During the migration, IPv4 and IPv6 will coexist in a same network. This migration process poses new challenges on the routers that are the core equipment in IP network. Traditional routers cant accommodate new future network with IPv4/v6 coexistence. The routers must be improved and upgraded so that they can support both IPv4 and IPv6.Given that the core router is very important and carries huge Internet traffics, it must be able to support IPv6 forwarding at wire rate. It means ASIC chip, but not software is used to support IPv6 packet processing. At the same time, it is very important that this support cant sacrifice any IPv4 performance. After all, most of current traffics is IPv4. The core router must expand to support IPv6 routing tables and needs to support IPv6 routing protocols, such as BGP4+, OSPFv3, ISISv6, RIPng and etc. It needs to support some migration strategy from IPv4 to IPv6, such as Tunnel, Dual Stack, Translation and etc. Same as many network technologies, successful deployment of IPv6 relies on the deployment of the operators IPv6 network. As one core component in IPv6 network, IPv6 core router is key to network building, applications, performance and stability. At present, mainstream router vendors like Cisco and Juniper announce that their routers can support IPv6 while some traditional IT equipment manufactures, especially those in Japan, think Internet upgrade caused by IPv6 will change the whole landscape of router market, which brings significant opportunities for them to enter router market. From 2000 to 2002, Hitachi, NEC and Fujitsu announced IPv6-capable core router to gain some market share in new Internet network. It must be admitted that IPv6 is still in the initial phase at present, which is reflected in the following aspects: most IPv6 network is in trial phase, the number of access users is low, carried IPv6 traffics cant be comparable to IPv4, the interoperability between IPv6 equipment still needs to be proved, and network engineers lack in experience in large-scale deployment and operation of IPv6 network. The lack of data and experience is one of important causes that make some operators lack in confidence in IPv6 network deployment. Many operators take wait-and-see attitudes. In order to prove IPv6 router (especially IPv6 core router), the support to IPv6, how are they performed and interoperated, provide a practical data basis for the operators to deploy IPv6 network and provide a reference for equipment manufactures to evaluate and improve their equipment, BII(Beijing Internet Institute) collaborate with 6TNet (IPv6 Telecom Trial Network) in China tested IPv6 core routers from 4 ven dors (Fujitsu, Hitachi, Juniper and NEC) in Beijing from October to December 2002. BII performed protocol conformance, performance and  interoperability tests. In these tests, we used the test instruments provided by Agilent and received strong technical support from Agilent. The test is not a comparative performance test in different router vendors. The purpose is to verify the feasibility of IPv6 deployment. With this test, the test team thinks that all SUT (system under test) has the ability to support commercial IPv6 network and provide basic IPv6 capabilities. They can support IPv6 routing protocols, support the forwarding of IPv6 datagram at wire rate and provide interoperability between them. From perspectives of pure technology, the test team thinks the products have been ready to deploy basic IPv6 core network.. Brief Descriptions of Test The requirements for hardware provided by the SUT (system under test) are as follows: IPv6-capable core router OC48 SM ports (both ports must be in different boards) Supports both FE ports and GE ports. The number of FE ports and GE ports is no less than 3 Finally, all vendors basically meet those requirements, although CX5210 provided by NEC doesnt support FE during the time of testing. The requirement for IPv6 capabilities provided by the SUT (system under test) include: support of IPv6 forwarding in hardware and support of related IPv6 routing protocols and migration strategy. Finally, all vendors meet our requirements as shown in the following table. Company IPv6 hardwareDual Stack RIPng OSPFv3 BGP4+ IPv6 over IPv4 forwarding Tunnel Fujitsu 9 9 9 9 9 9 Hitachi 9 9 9 9 9 9 Juniper 9 9 9 9 9 9 NEC 9 9 9 9 9 9 The SUT (system under test) models and OS versions are shown in the following table. Company Model Version Fujitsu Geostream R920 E10V02L03C44 Hitachi GR2000-20H S-9181-61 07-01 [ROUTE-OS6] Juniper M20 5.5R1.2 NEC CX5210 02.0(2e) 45.08.00 The test instruments we used in the test are as follows: Agilent Router Tester 900 Version: Router Tester 5.1,Build 11.15. Agilent QA Robot Version: Router Tester 5.3,Build 5.2 The IPv6 core router test is composed of three parts: Protocol conformance test, interoperability test and IPv6 performance test. Basic IPv6 Protocols and RIPng Basic IPv6 protocols include IPv6 Specification (RFC2460), ICMPv6 (RFC2463), Neighbor Discovery (RFC2461), Stateless Autoconfiguration (RFC2462), Path MTU Discovery (RFC1981), IPv6 address Architecture (RFC1884) and etc., which are basic capabilities provided by an IPv6 implementation. RIPng is defined by RFC2080 and is the extension and expansion of RIPv2. Its basic capabilities are same as RIPv2. The routing information exchanged by RIPng can carry IPv6 addresses and prefixes. RIPng runs on IPv6 network, uses multicasting address ff02::9 as destination to transfer routing information. RIPng is not compatible with RIPv2. RIP protocol is typically used in small networks and is not deployed in large networks because of its scalability and performance, which is same in IPv6 networks. The test does not include basic IPv6 protocols and RIPng because we think both capabilities are most basic and most preliminary capabilities that should be provided in an IPv6 router, these capabilities are implemented and interoperated very well in the routers from 4 vendors, and the 4 tested routers have been tested publicly or non-publicly several times in different occasions and provided good data. Therefore, we think it is unnecessary to make efforts to repeat these work and we skipped this test and focused on more challenged test items. BGP4+ Protocol Conformance Test At present, the external gateway protocol used in the IPv4 network is BGP4. Its basic protocols are defined in RFC1771. In order to carry IPv6 network information in BGP4 updates, IETF has defined a special property multi-protocol BGP (MP-BGP), also called IPv6 NLRI (Network Layer Reachability Information) to exchange IPv6 routing information, which is not a new version of BGP protocol, but an extension to BGP4. The extension is generally called BGP4+, which is compatible with BGP4. Refer to RFC2545 for its definition. Test Purpose and Used Standards: Purpose: To test the implementation of BGP4+ and conform with related standards for SUT (System Under Test). The following standards are referred in the test: Bates, T., Chandra, R., Katz, D. and Y. Rekhter, â€Å"Multiprotocol Extension for BGP-4†, RFC 2858, Jne 2000. Bates, T., Chandra, R., Chen, E., â€Å"BGP Route Reflection An Alternative to Full Mesh IBGP†, RFC2796, April 2000. Chandra, R. and J.Scudder, â€Å"Capabilities Advertisement with BGP-4†, RFC 2842, May 2000. Dupont, F. and P. Marques, â€Å"Use of BGP-4 Multiprotocol Extensions for IPv6 Inter-Domain Routing†, RFC 2545, March 1999. Rekhter, Y. and T. Li, â€Å"A Border Gateway Protocol 4 (BGP-4) †. Traina, P., McPherson, D., Scudder, J., â€Å"Autonomous System Confederations for BGP†, RFC3065, February 2001. Test Methods: All the tests are based on topology emulation. One test port of instrument firstly establishes network topology emulation, then executes pre-written scripts, interacts with the port of SUT, performs related BGP4+ protocol tests individually and each test generates Passed/Failed record. The tests can be divided into active tests and passive tests. Active test means the tester is used to verify the state machine of SUT and the correctness of message format while passive test means the tester is used to interfere with SUT using messages with errors. Test Topology Test instrument and SUT use two independent Fast Ethernet or Gigabit Ethernet connections. All BGP4+ runs on the Fast Ethernet or Gigabit Ethernet connections. The physical topology is as follows: The logical topology is as follows: Test Items and Descriptions of Test Results: The BGP4+ protocol conformance test involves in the BGP multi-protocol extension, setup and transfer of BGP4+ IBGP and EBGP sessions, ability to receive IPv6 route updates, BGP4+ next hop, starting point, MED, local preference, AS_PATH, atom aggregation, community name and various properties, the ability of SUT to correctly process these properties, BGP4+ route reflector capability, BGP4+ federation capability. These tests can only ensure implementation of BGP4+protocol in SUT comply with the standard defined by RFC, and cant ensure SUT fully and successfully deploy BGP4+ routes in commercial IPv6 network. The following diagram briefly describes the test results. Attached table 1 includes all test items, description and detailed results of BGP4+ conformance tests for 4 routers. The test items and descriptions are extracted from RFC2858, RFC2545, RFC2842, RFC2796, RFC3065 and draft-ietf-idr-bgp4-14.txt part. Model Failed test items Fujitsu GeoStream R920 2 Hitachi GR2000-20H 5 Juniper M20 1 NEC CX5210 3 Analysis of Test Results: Capabilities not supported Confederation Route reflector, Community Fujitsus GeoStreamR920 of current version does not support BGP4+ federation capability. In all BGP4+ test items it supported, the general performance is fairly good. What needs to be improved is only one item that is to support the migration of undefined property and handle interim duration. It is hoped to improve null interface which cant support next hop at present. Hitachis GR2000-20H of current version supports all test items, and is only product fully supporting BGP4+ protocols in the core routers from 3 Japanese companies. However, it needs to be improved in the following areas: handling next-hop property of IBGP in BGP4+ protocol, using AS_PATH properties to prevent from route loop, the ability of route reflector to detect ORIGINATOR_ID. At the same time, we found in the interoperability test that GR2000-20H cant establish non-physical direct-connection sessions with IBGP peering entities, which Hitachi needs to improve. It is hoped to add loopback address capability. Junipers M20 passes all tests except one item excellently. NECs CX5210 of current version doesnt support BGP4+ route reflector and community properties. In all BGP4+ test items it supported, the general performance is fairly good. However, it needs to be improved in handling BGP4+ federation AS_CONFED_SEQUENCE property. It is hoped to add null interface configuration. Interoperability Test As above mentioned, IPv6 is in initial phase of commercial deployment at present. A large amount of IPv6-capable network equipments and terminals are available. IPv6 network built by the operators doesnt only use the equipment provided by a vendor. In multi-vendor network environment, the interoperability between equipment is vital. The interoperability test is composed of BGP4+ interoperability test and OSPFv3 interoperability test. It should be noted that specific items in the interoperability test only cover some most common properties of BGP4+ and OSPFv3, and are not the interoperability tests of all properties of BGP4+ and OSPFv3. BGP4+ Interoperability Establish IBGP Sessions Test Descriptions: The test is to verify GR2000-20H, CX5210, R920,M20 and fully meshed iBGP connections that can be established. Reference: RFC1771, RFC2545 and RFC2858. Test steps: GR2000-20H, CX5210, R920, M20 and SUT are connected as shown in the following diagram. 4 routers are in a same autonomous domain and are interconnected using IBGP protocol to form a full-meshed IBGP connection. Test instrument and SUT are interconnected using EBGP connection. Because GR2000-20H doesnt support IBGP across-router Session connection, we use a FE link to connect GR2000-20H to M20 to form a fully-meshed connection. Test Results: We verified whether iBGP sessions were established between GR2000-20H, CX5210, R920 and M20, and it was found all connections were set up successfully. GR2000-20H CX5210 R920 M20 GR2000-20H N/A OK OK OK CX5210 OK N/A OK OK R920 OK OK N/A OK M20 OK OK OK N/A EBGP- Route Advertisement Test Descriptions: To verify GR2000-20H, CX5210, R920 and M20 can advertise routes properly in a fully meshed networks. References: RFC1771, RFC2545 and RFC2858. Test steps: Establish network topology according to previous test, establish eBGP connection between tester and SUT, send 100 EBGP routes from tester to SUT. Results: We verified whether GR2000-20H, CX5210 and R920 and M20 routing tables were correct, and it was found all routing tables were correct. GR2000-20H CX5210 R920 M20 GR2000-20H N/A OK OK OK CX5210 OK N/A OK OK R920 OK OK N/A OK M20 OK OK OK N/A Establish EBGP Sessions Test Descriptions: The test is to verify GR2000-20H, CX5210, R920 and M20 can establish a fully meshed eBGP connections. Reference: RFC1771, RFC2545 and RFC2858. Test steps: GR2000-20H, CX5210, R920 and M20 are connected as shown in the following diagram. Test Descriptions: We verified whether EBGP sessions were established between GR2000-20H, CX5210, R920 and M20, and it was found all connections were established successfully. GR2000-20H CX5210 R920 M20 GR2000-20H N/A OK OK OK CX5210 OK N/A OK OK R920 OK OK N/A OK M20 OK OK OK N/A EBGP Route Advertisement Test Descriptions: To verify GR2000-20H, CX5210, R920 and M20 can advertise EBGP routes properly. References: RFC1771, RFC2545 and RFC2858. Test steps: Establish network topology according to previous tests, send routes from each router to all other routers. Test Results: We verified whether GR2000-20H, CX5210 and R920 and M20 routing tables were correct, and it was found all routing tables were correct. GR2000-20H CX5210 R920, M20r GR2000-20H N/A OK OK OK CX5210 OK N/A OK OK R920 OK OK N/A OK M20 OK OK OK N/A OSPFv3 Interoperability OSPF protocols supporting IPv6 is OSPFv3. OSPFv3 routing mechanism is basically same as OSPFv2. However, OSPFv2 relies primarily on IPv4, while OSPFv3 makes many improvements in OSPFv2 and is not a simple extension, thus OSPFv3, whose corresponding protocol is RFC2740, runs on IPv6. For real world applications, many operators regard OSPFv3 as a brand new protocol, also its stability and maturity need to be further verified, so when IPv6 routing protocols are selected, it tends to use IS-ISv6 (draft-ietf-isis-ipv6-02.txt), which is only a simple extension to IS-ISv4 (RFC1195) (2 TLVs re-defined) and does not make changes fully. However, it is sure the opinion is not authoritative and need to be proved. Because of the limitations of test instrument, It is required for SUT to provide 100M Ethernet interface. As CX5210 does not support Ethernet interface at present, just M20, R920 and GR2000-20H were involved in the testing. However, it does not imply that CX5210 cant interoperate with other 3 routers and has any problems with functions implementation. In the test, GR2000-20H is called SUT1 in short, M20 is called SUT2, and R920 is called SUT3. Establish OSPF Connections DR Election Test Descriptions: In the initial status, set different OSPF priority levels for SUT1, SUT2, SUT3 and the test instrument (10, 8, 5, 0). Connect these equipments based on the network topology below. Verify SUT1, SUT2, SUT3 and test instrument to establish OSPFv3 adjacency and vote DR/BDR. After DR/BDR is established properly, put DR off the network, and check whether DR/BDR is established properly. Put off-net equipment on the network, and check whether DR/BDR is established properly. Change OSPF initialization priorities of SUT1, SUT2, SUT3 and test instrument, and implement new test from step 2. Repeat the tests for 4 times, and ensure each SUT and test instrument have one opportunity to be selected as DR and BDR under the intial status. During the test, all SUTs are in the same OSPF Area 0. Reference: RFC2740 Test Results: During the testing, all the OSPF adjacencys can be established between SUTs and DR, also BDR can be elected properly. After DR is off-line, BDR can be re-elected as DR and the one with sub-top priority will be BDR. When off-line equipment is on-line again, no re-electing process occurs. All test results comply with the requirements in related standards. Exchange LSA Database Test Descriptions: Test instrument simulates an internal network with 4 routers connected, and sends the routing information to SUT. Then verify the routing information received by SUT DR from test instruments will be sent to DR Other correctly. Same as the previous test item, firstly SUT1 is used as DR, then SUT2, and finally SUT3. Reference: RFC2740 Test Results: During the testing, OSPF adjacency can be established properly between all SUTs. DR receive LSA information from test instrument and properly send the information to DR Other, which can also receive and process LSA information properly. IPv6 Performance Test The major approach used for the performance testing was to send the IPv6 traffic with different packet sizes and specific QoS information, via SUT to the destination, and then by the tester measure the throughput, latency and packet loss of SUT in various topologies. For the IPv6 performance test, there are four vendors high-end IPv6 routers, with OC-48 POS ports on which throughput and latency will be measured, with IPv6 packet sizes of 64 bytes, 128bytes, 256 bytes, 512 bytes, 1024 bytes, 1480 bytes and 1500 bytes. The performance in various of circumstances were measured, including IPv4/IPv6 mixed traffics (IPv4 and IPv6 traffics with different ratio), IPv6 traffic with packet sizes mixtures, Sweep Packet Sizes. Also the maximum routing table entry supported and the performance on manually configured tunnels were verified. Most of the referred standards is extracted from RFC2544. At present, there are deficient applications for IPv6, and the number of users in the IPv6 network can not be compared to IPv4. The sum of maximum IPv6 of IX(Internet eXchage) traffics is less than dozens of Mbits/s. These traffics can be handled using a router refitted from a PC. Based on the circumstance, is it necessary to test the performance of OC48 ports ? Actually when the operators build IPv6 network and purchase IPv6 routers, todays IPv6 network is not under their consideration. Their networks should be able to deal with the changes and growth of IPv6 network next 5 7 years. In this sense, it is necessary for IPv6 core router to support the IPv6 traffic forwarding capacities at wire rate. Otherwise, what differences can be made between a real IPv6 router and a router refitted from a PC with installed BSD and Zebra ? The measurement of the number of routing table entry also meets the same situations. At present, therere around 300-400 entries in the IPv6 backbone router routing table, which cant compared to the huge number of IPv4 (110,000 ¼Ã‚ 130,000 routes). Secondly, IPv6 has drawn experience and lessons from IPv4 in design and address assignment. RIR only assigns the large block and fixed length IPv6 addresses to IPv6 operators, instead of the end users. To some extent, this can protect IPv6 routing tables from the explosive growth. The strict prefix filtering mechanism was set on BGP4+ routers by most of IPv6 network administrators and the router only allows minor prefixes, such as /16, /24, /28, /32, /35 and etc. However, the experience of IPv4 teach us a lesson- â€Å"Money Talks!†. In the fiercely competitive ages, it is very difficult for operators to reject users requirements. Under the conditions that IPv6 doesnt solve the problems of Multi-homing completely, it is possible that the network operators are required to broadcast users network prefixes into global IPv6 routing tables in order to achieve Multi-homing applications. So far RIR has begun to assign /48 ad dress segment to IPv6 of IX independently, while it is suggested IX doesnt broadcast the addresses. Thirdly, in many IPv6 networks, there are at least two IPv6 addresses segments, from 6BONE(3ffe::/16) and RIR(2001::/16) respectively, and maybe more prefixes will appear in the future. Fourthly, RIR cant ensure IPV6 addresses assigned to IPv6 operators are from a continuous address block. Current assignment policy indicates that /32 addresses of IPv6 assigned to operators can be continuously extended to /29. If new addresses are further required, they must be assigned to discontinuous address blocks and result in the growth of the number of routing tables. To sum up, the test team suggests that the number of IPv6 routing tables supported by the router should be no less than that of IPv4 routing tables, since it is very difficult to estimate the increasing number of routing tables of IPv6 core network right now. In current IPv6 networks, commercial IPv6 network and IPv6 trial network (6BONE) are interlaced without a explicit boundary between them. A packet from commercial IPv6 network may go through many IPv6 trial network before arriving at another IPv6 network. The network administrators of many trial networks are not regarded as a â€Å"operators†, but a â€Å"players† It is pretty unstable of their networks, with routers reset very frequently. In the meantime, the networks advertise global IPv6 routes to all peers, making their own IPv6 network to implement transit. It causes the instability of current IPv6 of BGP routes, and thus it is required the capabilities of IPv6 routers cover the flapping and convergence properly, which should be included in this test, however due to limited test time frame, it is a pity the test team has to give up these tests. The network topology used for the performance test is shown as following: Ideally, the test topology should be as following, so that the packet forwarding capability of the routers in real-world network environment is shown completely. Send one traffic from a source port of the tester, via multiple ports of the router to the destination ports of tester, measure the performance of the router. However as the vendors cant provide enough OC48 ports, the test team can only perform the test by simply sending packets from one port and receiving packets form another port. In this sense, this test environment cant simulate completely the performance of the router in the real-world network environment. The Measurement of Throughput and Latency with Different IPv6 Packets Sizes at OC-48 POS port Test Descriptions: To test the maximum IPv6 packet forwarding rate of SUT with zero packet loss with different IPv6 packet sizes. Test Methods: Send IPv6 packets, via SUT to the destination ports of the tester, which measures the packet rate of SUT according to the received IPv6 packets. Set the initial offered load to 2%, and If no packet loss occurs, increase the offered load to 100% and repeat the test. If packet loss occurs, decrease the offered load to (100%+2%)/2=51%, repeat the test again†¦Ã¢â‚¬ ¦In a binary search manner, continue to increase or decrease the offered load in subsequent iterations until the difference in offered load between successful and failed tests is less than the resolution for the test. This is the zero-loss throughput rate. Traffic forwarding mode: full duplex. Offered Packet type: IPv6; Offered Packet size (bytes): 64 128 256 512 1024 1480 1500 Test duration of each packet type(s): 5 Bandwidth resolution (%): 0.1 Line BER tolerance (10^_): -10 The results are as follows: Sustainable Throughput of OC-48 POS Port 105.00% 100.00% 95.00% 90.00% 85.00% 80.00% 75.00% 70.00% 65.00% 60.00% 55.00% 50.00% 64 128 256 512 1024 1480 1500 bytes bytes bytes bytes bytes bytes bytes Test Packets Size Average Latency (us) at Variable Test Packets Size 100 90 80 70 60 50 40 30 20 10 0 Test Packets Size Hitachi NEC Fujistu Juniper Hitachi NEC Fujistu Juniper Note: About inherent latency of tester Before we perform tests, we must consider intrinsic latency of tester. The following table indicates inherent latency of tester for different test packet sizes when sending 100% offered load. Inherent latency of tester (100% offered load) Packet Size (bytes) 64 128 256 512 1024 1480 1500 Average Inherent 2.74 2.69 2.69 2.65 2.65 2.60 2.60 Latency (us) From the above, the inherent latency of tester under different packet sizes is about 2.7us. Compared to the tens of us of SUTs latency, there are not significant impacts on the test results. In addition, the impact of inherent latency is fair to these 4 SUTs. Forwarding Performance of IPv4/IPv6 Packets on OC48 Ports Test Descriptions: To verify the performance of SUT to forward IPv4/IPv6 packets in offered packets sizes. The test requires SUT to support IPv4/IPv6 dual protocol stacks. Test Methods: The tester sends IPv4 and IPv6 traffic simultaneously in full duplex configuration, via SUT to the destination port, measure the throughput and latency with various ratio of IPv4 and IPv6 traffic. Send traffic with 50% of IPv4 and 50% of IPv6 and 100% offered load first time. If packet loss occurs, decrease the offered load in 5% resolution until the difference in offered load between successful and failed tests is less than the resolution for the test. This is the zero-loss throughput rate. At the same time, measure the latency at maximum forwarding rate. Then change the ratio of IPv4 and IPv6 traffic to test again. Increase continuously the proportion of IPv6 traffic to simulate the change of traffic characteristics in the real-world network transition. Test Descriptions: Offered load (%): initial100% with 5% increment and final 0 Offered packet types: IPv6 Percentage of IPv4 and IPv6 traffic: 50:50—10:90 (IPv4:IPv6) Offered packet size (bytes): 62 512 1518 Test duration of each packet size(s): 5 The test results are as follows: Sustainable throughput of OC-48 POS port at packet size 64 bytes with different percentage of IPv4 and IPv6 traffic Sustainable Throughput of OC-48 POS Port at Packet Size 64 bytes with different Percentage of IPv4 and IPv6 Traffic 105% 100% 95% 90% 85% Hitachi 80% NEC 75% Fujistu 70% Juniper 65% 60% 55% 50% 50/50 40/60 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Sustainable throughput of OC-48 POS port at packet size 512 bytes with different percentage of IPv4 and IPv6 traffic Sustainable Throughput of OC-48 POS Port at Packet Size 512 bytes with different Percentage of IPv4 and IPv6 Traffic 105% 100% 95% 90% 85% Hitachi 80% NEC 75% Fujistu 70% Juniper 65% 60% 55% 50% 50/50 40/60 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Sustainable throughput of OC-48 POS port at packet size 1518 bytes with different percentage of IPv4 and IPv6 traffic Sustainable Throughput of OC-48 POS Port at Packet Size 1518 bytes with different Percentage of IPv4 and IPv6 Traffic 105% 100% 95% 90% 85% Hitachi 80% NEC 75% Fujistu 70% Juniper 65% 60% 55% 50% 50/50 40/60 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Average latency (us) at test packets size 64 bytes with different percentage of IPv4 and IPv6 traffic Average Latency (us) at Test Packets Size 64 bytes with Different Percentage of IPv4 and IPv6 Traffic 100 90 80 70 60 50 40 30 20 10 0 50/50 40/6 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Hitachi NEC Fujistu Juniper Average latency (us) at test packets size 512 bytes with different percentage of IPv4 and IPv6 traffic Average Latency (us) at Test Packets Size 512 bytes with Different Percentage of IPv4 and IPv6 Traffic 100 90 80 70 60 50 40 30 20 10 0 50/50 40/60 30/70 20/80 10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Hitachi NEC Fujistu Juniper Average latency (us) at test packets size 1518 bytes with different percentage of IPv4 and IPv6 traffic Average Latency (us) at Test Packets Size 1518 bytes with Different Percentage of IPv4 and IPv6 Traffic 100 90 80 70 60 50 40 30 20 10 0 50/50 40/60 30/70 20/80  Ã‚  Ã‚  Ã‚   10/90 IPv4/IPv6 Test Packets Percentage (IPv4/IPv6) Hitachi NEC Fujistu Juniper IPv6 over IPv4 Configured Tunneling Performance of OC-48 POS Port Test Description: Tunneling technology is an effective means to connect separate IPv6 networks via IPv4 backbone. This item is to verify the performance of SUT when SUT encapsulates IPv6 data packets into IPv4 payload and forwards the packets. Test Method: The tester sends IPv6 data packets to SUT, and configures an IPv6 over IPv4 tunnel between SUT and the tester. Thus after SUT receives pure IPv6 packets from the tester, it will encapsulate it into IPv4 packet payload, and send IPv6 packets to destination over IPv4 network. The tester analyzes the packets forwared by the SUT at receiving end, calculates the throughput of SUT for different sizes of packets under the IPv6 over IPv4 configured tunnel. Test Results: IPv6 packet size: 512 Destination address of sending IPv6 data packets: 3FFE:0:0:4::2/64 Bandwidth range of sending IPv6 tra