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Analysis
•
In the Anycast RP application, RPs in the same PIM-SM domain are configured to be MSDP
peers to achieve load balancing among the RPs.
•
An MSDP peer address must be different from the Anycast RP address, and the C-BSR and
C-RP must be configured on different devices or interfaces.
•
If you configure the
originating-rp
command, MSDP replaces the RP address in the SA
messages with the address of the interface specified in the command.
•
When an MSDP peer receives an SA message, it performs RPF check on the message. If the
MSDP peer finds that the remote RP address is the same as the local RP address, it will discard
the SA message.
Solution
1.
Use the
display ip routing-table
command to verify that the unicast route between the routers
is correct.
2.
Verify that a unicast route is available between the two routers that will become MSDP peer to
each other.
3.
Verify the configuration of the
originating-rp
command. In the Anycast RP application
environment, use the
originating-rp
command to configure the RP address in the SA
messages, which must be the local interface address.
4.
Verify that the C-BSR address is different from the Anycast RP address.