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Configuration Guide - IP Multicast

CloudEngine 12800 and 12800E V200R005C10

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, PIM (IPv4), PIM (IPv6), MSDP, multicast VPN, multicast route management (IPv4), multicast route management (IPv6), IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN, multicast network management.
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RPs Fail to Exchange Registration Information with Each Other

RPs Fail to Exchange Registration Information with Each Other

Fault Description

Rendezvous points (RPs) in the anycast RP application fail to exchange (S, G) information registered to a local device with each other.

Fault Analysis

Pay attention to the following configuration notes. If the requirements are not met, the anycast RP works abnormally.

  • The address of an MSDP peer must be different from the address of the anycast RP. The candidate bootstrap router (C-BSR) and candidate rendezvous point (C-RP) must be configured on two devices or interfaces.
  • An MSDP peer performs a reverse path forwarding (RPF) check on a received SA message and then discards the message if the addresses of the local RP and the remote RP are the same. Run the originating-rp command on the anycast RP to replace the RP address contained in the SA message with the address of a specified interface.


  1. Check whether the two devices that will be configured as MSDP peers learn ARP entries from each other.

    Run the display arp command to check whether two devices learn ARP entries from each other.

  2. Check whether there is a reachable unicast route between two devices that will be configured as MSDP peers.

    Run the display ip routing-table command to check whether there is a unicast route between the local MSDP peer and the remote MSDP peer.

  3. Check that the interface address of the MSDP peers is correct.

    Run the display current-configuration command to check whether the local interface address is the same as the address of the MSDP peer.

  4. Check whether the RP configuration is correct.

    In the anycast RP application, configure RPs with the same address on multiple switches in a PIM-SM domain. Generally, configure a loopback interface on each device and assign the same IP address to the loopback interfaces.

  5. Check whether the originating-rp command is configured.

    The originating-rp command must be configured on an anycast RP and the interface address specified by this command must be the same as the address of the local interface connected to the MSDP peer.

  6. Check the C-BSR address and the anycast RP address, and ensure that the two addresses are different.
Updated: 2019-04-20

Document ID: EDOC1100074724

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