Connectivity Guide

• OS10 learns the multicast router interface dynamically based on the interface on which IGMP membership query is received. To assign a

multicast router interface statically, use the ip igmp snooping mrouter interface interface—type command in VLAN

INTERFACE mode.

NOTE:

IGMP snooping dynamically detects the mrouter interface based on IGMP queries that it receives. If there are more than one

multicast routers connected to the snooping switch, one of them will send IGMP queries and the interface connected to that

router is dynamically learnt as an mrouter port. You must congure the interfaces connected to other multicast routers as static

mrouter port.

• (Optional) Congure the IGMP version using the ip igmp version version-number command in VLAN INTERFACE mode.

• (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