No Sa Entry In The Sa Cache Of The Router - H3C S5600 Series Operation Manual

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Operation Manual – Multicast

H3C S5600 Series Ethernet Switches

5.7.2 No SA Entry in the SA Cache of the Router

An MSDP fails to send (S, G) forwarding entries through an SA message.

II. Analysis

You can use the import-source command to send the (S, G) entries of the local

multicast domain to the neighboring MSDP peer through SA messages. The acl

keyword is optional. If you do not use this keyword, all (S, G) entries will be filtered out

by default, that is, none of the (S, G) entries in the local multicast domain will be

advertised. Before the import-source command is executed, the system will send all

(S, G) entries in the local multicast domain. If the MSDP fails to send the (S, G) entries

of the local multicast domain through SA messages, verify that the import-source

command is configured correctly.

III. Solution

Check the connectivity of the route between the routers. Use the display ip

routing-table command to check that the unicast route between the routers is

Further check that a unicast route exists between two routers that will become

MSDP peers and that the route leads to the two peers.

Verify the configuration of the import-source command and the corresponding

ACL to ensure that the ACL rule filters the right (S, G) entries.

Chapter 5 MSDP Configuration

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