Did you enable IGMPv3 on the switch? How did you ensure all your hosts were running IGMPv3?
>From memory I had to registry hack the windows hosts to get it to run the expected version. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Neiberger Sent: Tuesday, 25 January 2011 7:16 AM To: [email protected] Subject: [c-nsp] Effect of IGMP version on IGMP Snooping We have a flat layer two network with IGMP snooping turned on. We are currently running IGMP v2 everywhere, but we need to enable v3. We tested this a few nights ago and found that switching to v3 caused a disruption. Everything started working again after we switched back to v2. This doesn't make much sense to me. We have an interface acting as IGMP querier, so snooping seems to be working. But why would changing IGMP versions cause any disruption? And why would switching back to v2 suddenly make it work? If it matters, this is a Cisco 4948 running 12.2(25). _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
