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Configure MSDP Peer Connection

After the device receives the SA packet, perform the RPF check. The packets passing the check are forwarded to the other peers that set up the peer connection. The packets not passing the RPF check are dropped.

The default peer, mesh group can omit specifying the RPF check of the SA packet between the peers.

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 the MSDP peer

Configure Default MSDP Peer

When specifying the default MSDP peer, you can configure the RP range. When receiving the SA packet sent by the default peer and if the RP in the packet belongs to the permitted range, do not perform the RPF check. Otherwise, still perform the RPF check for the RP in the packet.

Table 8-4 Configure the default MSDP peer

Step

Command

Description

Enter global configuration mode

configure terminal

-

Configure the default MSDP peer

ip msdp [ vrf vrf-name ] default-peer peer-ip-address [ prefix-list prefix-list-name ]

Mandatory

By default, the MSDP default peer is not configured.

Configure MSDP Mesh Group

When receiving the SA packet from the peer in the group, the device directly passes the RPF check and does not forward the SA packet to the other peers in the group, but just forwards to the peers out of the group. This can reduce the load of the device and avoid the repeated forwarding, so as to save the network bandwidth.

Table 8-5 Configure the MSDP mesh group

Step

Command

Description

Enter global configuration mode

configure terminal

-

Configure the MSDP mesh group

ip msdp [ vrf vrf-name ] mesh-group mesh-group-name peer-ip-address

Mandatory

By default, no peer is added to the mesh group.