基于VRRP的虚拟路由通告

Virtual Router Advertise Based on VRRP

目前虚拟路由冗余协议(VRRP)的标准实现中,如果把虚拟地址作为主机路由加入到路由表中,会导致上行的数据流向与下行数据流向的不一致,可能造成报文丢失。虚拟路由通告的方法则把主设备中的虚拟地址通告给上行接入设备,从而下行流量可以通过上行设备的选路,使上下行数据流向保持了一致。通过在中兴通讯路由器上的实验,验证了该方法能够使虚拟路由冗余协议流量路径一致。对于路由冗余备份功能的优化具有一定的实用价值。

Presently, during the implementation of standard Virtual Router Redundancy Protocol （VRRP）, virtual address is added to routing table as a host route, which may lead to upstream data flow having a different direction from that of downstream data flow, thus causing packet loss. According to virtual router advertise, virtual address of master device is used to upstream access device, which enables downstream traffics to have the same flow direction with that of upstream traffics via routing. With experiment on ZTE router, it is verified that this method can make traffic flow over the same path. It benefits the optimization of route redundancy backup function.