PIM-SM always sent unicast to RP

Unanswered Question
Dec 10th, 2007
User Badges:



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.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
seekianherng Mon, 12/10/2007 - 19:44
User Badges:

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.


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
User Badges:
  • Super Bronze, 10000 points or more
  • Hall of Fame,

    Founding Member

I believe you hit it on the nail on the first post, your only valid option (IMHO) is GRE tunneled - per your requirements.


This Discussion