An architecture for carrier grade programmable networks

Abstract

Absamr-Active and programmable network allow innovative new se, -vices t m bo deployed rapidly. However, in a carrier grade network, il is imperative to maintain a sealable fast path mechanism 30 Ihat the delay and throughput requimmcntl arc mrt. This is p m t i d s r l y important since in many c a m ~itwork-IweI pmrrrsing is only needed for P subset of packets and the remainder of trilItic must he forwarded on the fast path. It is I challenge to design I e011 effective nodr archilectum that can ralirty this reqniremcnl. Currenl models are often 'malutionary' and may no1 scnlc to the required performance IeveIs of P carrier grade network In this paper we develop an evolutionary architecture that uses MPLS label stack lo enable efficient and ncalablr extraction Of active packets from the fast path without penaliring tho rest of the traffic. Our model can he u r d to extend the reach of programmable network Over legacy infrastructure and provide a migratoly path for existing carriers towards a programmable 1nfnsfr"eture.

Resilience-differentiation in programmable virtual networks

“…Each virtual network customer (VNC) can install and run customized code in virtual nodes to control routing and support application specific tasks, such as content adaptation and monitoring. A number of different pro-grammable virtual network architectures have been proposed over the past few years, for example Tempest [3], Virtual Active Network [4] and the Programmable Virtual Network architecture [5]. However, the resilience issues related to a programmable virtual network infrastructure have not been addressed.…”

“…A set of general guidelines that apply to programmable virtual network architectures is presented. To illustrate how the guidelines can be met, a resilience differentiation enhancement of the PVN architecture [5] is proposed as a case study.…”

“…The rest of this document is organized as follows: Section II discusses general issues related to resilience differentiation in programmable virtual networks and presents a set of general guidelines. Section III presents a case study of how resilience differentiation can be incorporated in the Programmable Virtual Network architecture [5] and Section IV shows how the extended architecture meets both the general guidelines and the specific goals of the original architecture. Conclusions are given in Section V.…”