Enabling The Rejected Source-Active Cache; Accept Source-Active Messages That Fail The Rfp Check - Dell C9000 Series Networking Configuration Manual

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Enabling the Rejected Source-Active Cache

To cache rejected sources, use the following command.

Active sources can be rejected because the RPF check failed, the SA limit is reached, the peer RP is

unreachable, or the SA message has a format error.

Cache rejected sources.

CONFIGURATION mode

ip msdp cache-rejected-sa

Accept Source-Active Messages that

Fail the RFP Check

A default peer is a peer from which active sources are accepted even though they fail the RFP check.

Referring to the following illustrations:

In Scenario 1, all MSPD peers are up.

In Scenario 2, the peership between RP1 and RP2 is down, but the link (and routing protocols) between

them is still up. In this case, RP1 learns all active sources from RP3, but the sources from RP2 and RP4

are rejected because the reverse path to these routers is through Interface A.

In Scenario 3, RP3 is configured as a default MSDP peer for RP1 and so the RPF check is disregarded for

Multicast Source Discovery Protocol (MSDP)