核心路由器中缓存容量问题的研究

Research on Buffer Size for Core Routers

目前核心路由器在网络拥塞时用以存储数据的缓存容量巨大,这虽然保持了极高的链路利用率,但使核心路由器的结构更为复杂。斯坦福法则认为路由器中缓存容量可减少为拇指法则的1%。该文指出斯坦福法则会引起较高的丢包率,提出在降低一定链路利用率的情况下,较小的缓存容量也可以获得较低的丢包率和较高的吞吐率。

At present, core routers contain a huge number of buffers to hold packets during congestion, which.assures high rate of linking utilization, but leads to high complication for touters design. Stanford model suggests that the buffer size can decrease to 1% of Bandwidth Delay Product （BDP）. This paper analyzes the buffer size and shows that the Stanford model can lead to high drop rate of packets. Low drop rate and high throughput can be obtained with smaller buffer size in an acceptable link utilization.