ASON源路由中实现ECMP的方法

ECMP Realization in ASON Source Routing

传统的IP路由中,路由协议维护路由表,所有的分组根据路由表中的信息被转发。而在ASON(自动交换光网络)中的路由计算一般采用源路由的方式,没有路由表的参与,即每一次计算均为特定的业务进行,所计算出的路由即为该业务的实际路由,因此在ASON中无法通过更改路由表来实现ECMP(等价多路径)。本文介绍了一种在ASON源路由中实现ECMP的方法。

In traditional IP networks, all packets are forwarded according to the routing table which is maintained by routing protocol. But in ASON, source routing without routing table is almost the only acceptable way. In this way, routing calculation is performed for every single service request and the service will follow the route exactly. So it is not possible for ASON to realize ECMP（Equal Cost Mult Path） by changing routing table like in IP networks. This article is going to introduce a new way to realize ECMP in ASON.