3Com Switch 8800 Advanced Software V5 Configuration Guide

636 CHAPTER 43: MSDP CONFIGURATION
3 Check configuration of the import-source command and its acl-number
argument and make sure that ACL rule can filter appropriate (S, G) entries.
Inter-RP Communication
Faults in Anycast RP
Application
Symptom
RPs fail to exchange their locally registered (S, G) entries with one another in the
Anycast RP application.
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 the originating-rp command is executed, MSDP will replace 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 Check that a route is available between the devices. Carry out the display ip
routing-table command to check whether the unicast route between the devices
is correct.
2 Check that a unicast route is available between the two devices that will become
MSDP peer to each other.
3 Check the configuration of the originating-rp command. In the Anycast RP
application environment, be sure to 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.