Multipath Issues in Unicast and Multicast Next-Hop Selection

摘要: Various routing protocols, including Open Shortest Path First (OSPF) and Intermediate System to (ISIS), explicitly allow "Equal-Cost Multipath" (ECMP) routing. Some router implementations also equal-cost multipath usage with RIP other protocols. The effect of on a forwarder is that the potentially has several next-hops for any given destination must use some method choose which next- hop should be used data packet.