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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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An MSDP Peer Is Always in Down State

An MSDP Peer Is Always in Down State

Fault Description

An MSDP peer is configured, but is always in Down state.

Fault Analysis

MSDP sets up a TCP connection between a local interface address and a remote MSDP peer.

  • If the local interface address is different from the MSDP peer address configured on a remote device, the TCP connection cannot be set up.
  • If two MSDP peers have no route to each other, the TCP connection cannot be set up.


  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.

Updated: 2019-04-20

Document ID: EDOC1100074724

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