基于分组处理能力共享的低功耗路由器体系结构

Architecture of a power-efficient router based on the sharing of packet processing capacities

为了解决目前互联网中核心路由器功耗大并且功耗效率低的问题,提出了一种基于处理能力共享的路由器体系结构GreenRouter。该结构将路由器线卡拆分为分组处理部分(母板)和接口部分(子板),通过两级交换网络的互连使所有子板共享各母板的分组处理能力。调度算法将路由器各接口到达的流量分配到最小数目的处于工作状态的母板上,关闭其他母板实现节能。研究了GreenRouter的体系结构和运行机制中的关键问题,利用实际网络流量进行的模拟实验表明:GreenRouter在保证网络服务质量的前提下,能够节省超过40%的功耗。

Modern core routers in the Internet consume much power due to inefficiencies. This paper presents a power-efficient router architecture named GreenRouter, which is based on the sharing of packet processing capacities. GreenRouter separates every line-card into a network interface card and a packet processing card. All cards in the router are connected by a two stage switch fabric. The traffic from all the network interface cards shares all the packet processing cards and the traffic can be aggregated into a few active packet processing cards on demand while others are shut down to save power. The key issues of the GreenRouter＇s architecture are described. Real trace evaluations show that GreenRouter can save up to 40% of the power consumed while guaranteeing the quality of service （QoS） constraints.