Imagine I want to find out what type of queries (IGMPv1, v2 or v3) receivers are sending.
I am afraid that if I do 'debug ip igmp' I may overhelm the router.
So I thought about limiting the debug ip igmp output by filtering using access-list or at least vlan 3 traffic only (which is the one I want to study anyway).
I see 'filter' and 'max-groups' and I read the documentation but I do not see exactly how this will filter traffic. I don't see a way for me to use access-list using 'debug ip igmp'.
Any ideas on how to filter traffic only to debug traffic for one specific vlan? I just want to make sure I will not impact production if I debug this. But maybe if there are too many receivers on vlan 3, that may impact performance anyway.
Any suggestions on how to handle this debug without causing production problems?
3750L3#show ip igmp group
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter Group Accounted
239.100.2.2 Vlan10 13w6d stopped 10.3.35.34
239.100.2.4 Vlan10 4d08h stopped 10.3.35.43
239.254.11.4 Vlan3 13w6d stopped 10.3.32.10
239.254.11.7 Vlan6 13w6d stopped 10.3.38.10
239.254.11.10 Vlan8 13w6d stopped 10.3.40.10
239.254.11.22 Vlan6 13w6d stopped 10.3.38.11
239.254.11.24 Vlan8 13w6d stopped 10.3.40.10
239.254.10.24 Vlan3 13w6d stopped 10.3.32.11
239.254.12.1 Vlan6 13w6d stopped 10.3.38.201
3750L3#debug ip igmp ?
filter Filter events
max-groups Max-groups events
snooping IGMP snooping activity
vrf Select VPN Routing/Forwarding instance
<cr>
3750L3#debug ip igmp ?
