Wednesday, February 24, 2021

Question: IP PIM Multicast (sparse mode) on Catalyst with bidirectional flows?

Hi all,

I was wondering whether the following is possible and I could get some advice on below setup:

We have a (Catalyst 9300 & Nexus 5500) network setup with IP Multicast Sparse mode in use.

A while ago a second source / streamer has been added at a last hop switch which also has receivers connected to it.

Here the problem appears:

Example

The green arrows indicate the working main stream

The orange is the secondary which is being passed through till the RP

The red is NOT going through as it has a Prune flag on it on the RP for an unexplainable reason.

Any first thoughts?



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