Multicast - Accept-rp

Okay, working on my multicast notes and I hit a command that for whatever
reason I can't grasp its exact purpose. Furthermore, I don't really
understand the difference between statically defining and using auto-rp
cache?

Router(config)# ip pim accept-rp {address | auto-rp} <acl>

   - Address - Address of the RP

   - Auto-RP - Messages are accepted only for RPs that are in the Auto-RP
   cache.

   - ACL - Optional, defines the groups that are allowed from the specified
   RP.

Does anyone have a clear example using both options (static and auto-rp)?

Thanks!

-SL**

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Received on Sun Jun 12 2011 - 12:00:32 ART