WB1 8.20 Filtering BSR Messages

8.20 Filtering BSR Messages
• Configure your network so that R6 does not learn any RP information

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As you may recall, filtering Auto-RP messages requires applying the
administrative multicast boundary command. Filtering BSR messages is much
easier, as those are carried inside PIM. When you apply the command ip pim
bsr-border on a link, BSR messages are no longer flooded or received on that
link. This means that any RP or BSR advertisements are filtered, effectively
creating two isolated domains of RP information exchange.

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R1:
interface FastEthernet0/0
ip pim bsr-border

R4:
interface FastEthernet0/1
ip pim bsr-border

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Ensure that R6 did not learn any RP information via the BSR. Again it may take
a few moments for any previously existing entries to age out.

Rack1R6#show ip pim rp mapping
PIM Group-to-RP Mappings

Rack1R6#