From: Chris Broadway (midatlanticnet@gmail.com)
Date: Mon Sep 25 2006 - 19:36:30 ART
Group,
I have asked before about rate limiting multiple group-lists on a single
interface. I was experimenting around and saw something interesting. I
want to get your input.
The setup is a standard , sparse only, static RPs on each router setup. The
group is 239.1.1.1. I wanted to rate limit 239.1.1.1 and 224.0.1.40 on an
interface that did not have a downstream neighbor with PIM sparse mode
enabled. When I added both multicast rate-limit commands on the interface,
only one rate-limit showned up in the mroute table. That one was
239.1.1.1with the OID being the interface that did not have the down
stream
neighbor. The ip 224.0.1.40 had a prune flag.
Once I enabled PIM Sparse on the downstream neighbor, I was able to see
224.0.1.40 with the OID of the same interface the 239.1.1.1 had, and now
they were both rate limited.
If I removed PIM Sparse from the downstream router cleared the mroute table
of the router I was rate limiting on, I did not see the interface get
pruned. Therefore keeping the rate limiting for 224.0.1.40.
If I reboot the router though, I again saw only 239.1.1.1 rate limited and
224.0.1.40 was pruned.
My questions are...
1) Why do I see 239.1.1.1 being rate limited on an interface that has no
downstream router with PIM Sparse enabled?
2) Why do I not see 224.0.1.40 rate limit since 239.1.1.1 was being rate
limited?
3) If the prune message is making the rate limit not happen, how can I
unprune the interface if I do not have access to the downstream router?
Any assistance will be appreciated.
-Broadway
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