All things related to multicast

["Marshall Eubanks" <>]

On Tue, 3 Sep 2002 22:25:47 -0500
 "Richard Murphy" 
<>
 wrote:
> I have followed the Abilene cookbook on setting up multicasting and all
> looks OK on my border router. However, machines on a router connected to
> the border router cannot join any multicast groups. The border router is
> logging these PIM-INVALID_RP_JOIN messages. I have read the cisco note
> on fixing this issue and it leads to this question:
> 
> How does auto-rp work if the Abilene recommended filter for multicast
> groups
> includes 224.0.1.39 and 224.0.1.40 as denies? Are RPs something that is

Aren't these filters for the _border routers_ ? Auto RP should not
leak _outside_ a domain. It must propagate to work _inside_ the domain.

> used in lieu of MSDP or alone with MSDP? Both routers have pim

MSDP is used for RP's in different domains to communicate with each other.
MSDP and PIM are rather different in their use -
MSDP is source discovery - PIM is routing.

> sparse-mode set, but the second router uses some static routes, not iBGP
> and does not use MSDP either.
> 

Which router is the RP ? Also, are all of your routers Cisco ? This is 
required
if you are going to use auto-rp.

> Thanks to those who have been down this path already!
> 
> Richard Murphy
> 

Good luck

Marshall