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Re: Multicast configuration driving me nuts
Posted: 07 Mar 2026 07:37
by dtdamen
Hi Silvio,
there is nothing I can see for output. No life, no counter, nothing
Not on the core and not on the 6560 switches
No idea what´s wrong in my configuration.
Thomas
Re: Multicast configuration driving me nuts
Posted: 07 Mar 2026 15:06
by Cristek
At this point I'd open an SR with ALE.
I always do it the same way as Silvio. Globally.
Core:
Code: Select all
ip multicast admin-state enable
ip multicast version 3
ip multicast querier-forwarding enable
ip multicast querying enable
Edge:
Code: Select all
ip multicast admin-state enable
ip multicast version 3
ip multicast querier-forwarding enable
We never needed to use 'proxy' or 'spoofing', and sometimes we use 'zapping' on the Edge switches for IPTV as well.
That's it. I dont even know the exact use case for proxy and spoofing, but I know spoofing causes VoIP issues according to my colleagues.
In terms of show commands, you need to see info with:
show ip multicast group/neighbor/forward/querier
(what groups I'm in / what neighbors I have / what I forwarded to others / who is the querier)