Connectivity Guide

• (Optional) The fast leave option allows the IGMP snooping switch to remove an interface from the multicast group immediately on
receiving the leave message. Enable fast leave with the ip igmp snooping fast-leave command in VLAN INTERFACE
mode.
• (Optional) Congure the time interval for sending IGMP general queries with the ip igmp snooping query-interval
query-interval-time command in VLAN INTERFACE mode.
• (Optional) Congure the maximum time for responding to a query advertised in IGMP queries using the ip igmp snooping
query-max-resp-time query-response-time command in VLAN INTERFACE mode.
• (Optional) Congures the time interval between group-specic IGMP query messages with the ip igmp snooping last-
member-query-interval query-interval-time command in VLAN INTERFACE mode.
IGMP snooping conguration
OS10(config)# ip igmp snooping enable
OS10(config)# interface vlan 100
OS10(conf-if-vl-100)# ip igmp snooping mrouter interface ethernet 1/1/32
OS10(conf-if-vl-100)# ip igmp snooping querier
OS10(conf-if-vl-100)# ip igmp version 3
OS10(conf-if-vl-100)# ip igmp snooping fast-leave
OS10(conf-if-vl-100)# ip igmp snooping query-interval 60
OS10(conf-if-vl-100)# ip igmp snooping query-max-resp-time 10
OS10(conf-if-vl-100)# ip igmp snooping last-member-query-interval 1000
View IGMP snooping information
OS10# show ip igmp snooping groups
Total Number of Groups: 480
IGMP Connected Group Membership
Group Address Interface Mode Expires
225.1.0.0 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.1 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.2 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.3 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.4 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.5 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.6 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.7 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.8 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
225.1.0.9 vlan3531 IGMPv2-Compat 00:01:35
Member-ports :port-channel41,ethernet1/1/51,ethernet1/1/52
--more--
<<Output Truncated>>
OS10# show ip igmp snooping interface
Vlan100 is up, line protocol is up
IGMP version is 3
IGMP snooping is enabled on interface
IGMP snooping query interval is 60 seconds
IGMP snooping querier timeout is 130 seconds
IGMP snooping last member query response interval is 1000 ms
IGMP Snooping max response time is 10 seconds
IGMP snooping fast-leave is disabled on this interface
IGMP snooping querier is enabled on this interface
show ip igmp snooping mrouter
Interface Router Ports
Vlan 100 ethernet 1/1/32
414
Layer 3