In reply to Ritu Gupta.

Ritu, Polaris is just our internal code name for evolved IOS XE; they both refer to the evolution of our IOS XE software stack to become the common stack running across all the platforms in the enterprise portfolio. Subsequent posts by Pratap at http://blogs.cisco.com/enterprise/the-future-os-pushing-boundaries-on-networking and Jeff at http://blogs.cisco.com/enterprise/how-evolved-ios-xe-can-help-you-achieve-operational-excellence describe the technical underpinnings of the stack and some of the capabilities that evolved IOS XE will help enable.