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NE40E V800R010C10SPC500 Configuration Guide - IP Multicast 01

This is NE40E V800R010C10SPC500 Configuration Guide - IP Multicast
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Configuring Anycast-RP

Configuring Anycast-RP

Anycast-RP allows you to configure several Rendezvous Points (RPs) with the same address in a PIM-SM domain. Peer relationships are established between RPs so that the multicast source can register with the topologically closest RP and the multicast receiver can join the closest RP. This alleviates burdens on RPs, implements RP backup, and optimizes multicast forwarding paths.

Usage Scenario

In a traditional PIM-SM domain, each multicast group is mapped only to one RP. When the network is overloaded or traffic congests on an RP, the following problems may occur:

  • The RP is overloaded.

  • Routes converge slowly after the RP fails.

  • The multicast forwarding path is not optimal.

Compared with the traditional PIM-SM network, the multicast network deployed with Anycast-RP has the following advantages:

  • RP load balancing

    Each RP maintains only partial source and group information in the PIM-SM domain, and forwards partial multicast data.

  • RP redundancy

    After an RP fails, the multicast sources that register with it and the receivers that join it select another near RP to register with and join.

  • RP optimal path

    • Receivers send Join messages to the nearest RP, so rendezvous point trees (RPTs) have the optimal paths.

    • Multicast sources register with the nearest RP, so SPTs have the optimal paths.

Pre-configuration Tasks

Before configuring Anycast-RP, complete the following tasks:

  • Configure a unicast routing protocol to ensure that unicast routes are reachable.

  • Enable multicast routing on all routers and PIM-SM on all router interfaces.

  • Configure a PIM-SM domain without any RP.

Configuration Procedures

Figure 5-2 Flowchart for configuring Anycast-RP
Updated: 2019-01-03

Document ID: EDOC1100055017

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