H3C S7500E Series Ethernet Switches Operation Manual
Operation Manual – Multicast
H3C S7500E Series Ethernet Switches Chapter 6 MSDP Configuration
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argument, all the (S, G) entries will be filtered off, namely no (S, G) entries of the
local domain will be advertised.
z If the import-source command is not executed, the system will advertise all the (S,
G) entries of the local domain. If MSDP fails to send (S, G) entries through SA
messages, check whether the import-source command has been correctly
configured.
III. Solution
1) Check that a route is available between the routers. Carry out the display ip
routing-table command to check whether the unicast route between the routers is
correct.
2) Check that a unicast route is available between the two routers that will become
MSDP peers to each other.
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.
6.8.3 Inter-RP Communication Faults in Anycast RP Application
I. Symptom
RPs fail to exchange their locally registered (S, G) entries with one another in the
Anycast RP application.
II. Analysis
z 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.
z 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.
z 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.
z 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.
III. Solution
1) Check that a route is available between the routers. Carry out the display ip
routing-table command to check whether the unicast route between the routers is
correct.
2) Check that a unicast route is available between the two routers 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.