HP 6125G HP 6125G & 6125G/XG Blade Switches IP Multicast Configuration - Page 196
Inter-RP communication faults in Anycast RP application, Symptom, Analysis, Solution
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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. 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, 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. 185
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