Configure MSDP Peer

Set up the MSDP peer connection via the MSDP peer between the multicast domains, forming one “MSDP interconnection map”. When the MSDP peer of one domain perceives the new multicast source, encapsulate the new multicast source information in the SA (Source-Active) packet and send to all remote peers setting up the MSDP peer connection. After MSDP peer receives the SA packet, the SA packet passing the RPF (Reverse Path Forwarding) is forwarded. With the relay between the MSDP peers, you can transmit the SA message sent by one RP to all the other RPs, realizing the sharing of the multicast source information between the multicast domains.

Use the TCP as the transmission protocol between the MSDP peers. Use the reliability of TCP to ensure that the MSDP protocol packets can be transmitted to the remote peer correctly.

Configuration Condition

Before configuring MSDP, first complete the following tasks:

• Configure the network layer address of the interface, making the neighboring node network layer reachable
• Configure any unicast route protocol, making the intra-domain route reachable
• Configure the PIM-SM protocol, realizing the intra-domain multicast

Configure MSDP Peer

Set up the MSDP peer connection between the local device and the specified remote device. At the remote device, you also should specify the local device as the MSDP peer so that the peer connection can be set up successfully. After the peer connection is set up successfully, the peers interact the MSDP protocol packets via the connection.

Table 8-2 Configure the MSDP peer

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  When configuring the first MSDP peer, automatically enable the MSDP protocol.

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Disable MSDP Peer

The administrator can disable the specified MSDP peer connection via the command according to the network demand. After disabling the MSDP peer connection, stop interacting the MSDP protocol packets between the MSDP peers.

Table 8-3 Disable the MSDP peer