04-27-2009 03:14 AM - edited 03-06-2019 05:24 AM
Hi all, is IGMP snooping enabled by default on cisco switches, also do they use IGMP proxy function?
If so how do I turn these functions off / on
04-27-2009 09:56 AM
Carl,
IGMP snooping is enabled by default. IGMP proxy is not. To disable IGMP snooping:
(globally)
no ip igmp snooping
(per vlan)
no ip igmp snooping vlan xxx
Regards
04-28-2009 12:26 AM
should this be turned off then? or should I leave it on? How can I check the group to port assignments ?
also what benefit is IGMP snooping and IGMP proxy ?
04-28-2009 03:44 AM
Hello Carl,
as we discussed in another thread it is a question of implementation:
on switches supporting IGMP snooping in HW using an ASIC it is good to have it enabled.
Hope to help
Giuseppe
05-13-2009 03:29 PM
what if i use igmp snooping to constrain multicast traffic but don't have a router in the mix. Will this work?
Again, just one (maybe two) switch with IGMP snooping and no router.
05-13-2009 04:50 PM
Many switches that support IGMP snooping will act as an IGMP Snooping Querier, if enabled.
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