PIM-SM always sent unicast to RP

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Dec 10th, 2007
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hi,


Mcast_src---cat4948---Firewall---(RP)cat6513-720---Mcast_client


I'm trying to pass multicast traffic through the firwall and was wondering if its possible to force PIM-SM to always sent unicast packets (Register message) to RP without switching to SPT on the source-tree.

I understand that the other option is to use GRE tunnel between the two switches.

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seekianherng Mon, 12/10/2007 - 19:44
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hi EdisonOrtiz,


The infinity command seems to indicate that it only prevent SPT switching on the PIM leaf router (shared-tree path from RP) and not on the source-tree path between the multicast source and RP.


Mcast_src---source_tree--->RP---shared_tree--->Mcast_dest


I'm also wandering if constant encap-decap of multicast packets will cause dramatic increase in cpu load on both switches.


Is there a better way for sending multicast packets through the firewall ?

Edison Ortiz Tue, 12/11/2007 - 07:24
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I believe you hit it on the nail on the first post, your only valid option (IMHO) is GRE tunneled - per your requirements.

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