static multicast routes in sparse mode

From: Ben (bmunyao@gmail.com)
Date: Sat Jul 14 2007 - 12:44:09 ART

I can think of two situations for static mroutes.

1. You have a tunnel, and need your multicast traffic to use it
2. The IGP routes do not follow the same path as your multicast topology.

For dense mode, all mutlicast traffic is from source to receivers. the
static mroute is therefore pretty straightforward

ip mroute source-net mask tu1

For sparse mode, you need a static mroute for both the source, and RP. I
typically use the following to cover traffic to both source and RP:

ip mroute 0.0.0.0 0.0.0.0 tu1

In the lab, do they expect more precise mroutes (example below)?

ip mroute source-net mask tu1
ip mroute RP-net mask tu1

Would appreciate your comments

Ben

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