No Sa Entries In The Switch's Sa Cache; Inter-Rp Communication Faults In Anycast Rp Application - HP A5500 SI Switch Series Configuration Manual

No SA entries in the switch's SA cache

Symptom
MSDP fails to send (S, G) entries through SA messages.
Analysis
The import-source command controls sending (S, G) entries through SA messages to MSDP peers. If
•
this command is executed without the acl-number argument, all the (S, G) entries will be filtered off.
That is, no (S, G) entries of the local domain will be advertised.
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.
Solution
Verify that a route is available between the devices. Use the display ip routing-table command to
1.
determine whether the unicast route between the devices is correct.
Verify that a unicast route is available between the two devices that will become MSDP peers to
2.
each other.
Evaluate the configuration of the import-source command and its acl-number argument and be sure
3.
that the 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
Verify that a route is available between the devices. Use the display ip routing-table command to
1.
determine whether the unicast route between the devices is correct.
Verify that a unicast route is available between the two devices that will become MSDP peer to
2.
each other.
Evaluate the configuration of the originating-rp command. In the Anycast RP application
3.
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.
Verify that the C-BSR address is different from the Anycast RP address.
4.
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