We Know that today's scenario more and more people are opting for cloud computing for there computing needs. One of the benefit is that it will eliminate the risks involved with purchase of a new application . To deliver such high performance computing cloud data centers are equipped with tens to hundreds of thousands of servers delivering applications to millions of users. In such situation network performance must be uninterrupted, highly reliable and faultless with minimum predictable latency for all traffic types. Moreover the cloud network should be aware of flows of various...