Install Guide

Table Of Contents
Adjusting Timers
Preventing a Host from Joining a Group
Enabling IGMP Immediate-Leave
IGMP Snooping
Fast Convergence after MSTP Topology Changes
Designating a Multicast Router Interface
Viewing IGMP Enabled Interfaces
Interfaces that are enabled with PIM-SM are automatically enabled with IGMP.
To view IGMP-enabled interfaces, use the following command.
View IGMP-enabled IPv4 interfaces.
EXEC Privilege mode
show ip igmp interface
View IGMP-enabled IPv6 interfaces.
EXEC Privilege mode
show ipv6 mld interface
Dell#show ipv6 mld interface vlan 20
Vlan 20 is up, line protocol is up
Inbound MLD access group is not set
Internet address is fe80::92b1:1cff:fef4:9b63/64
MLD is enabled on interface
MLD query interval is 60 seconds
MLD querier timeout is 125 seconds
MLD max query response time is 10 seconds
MLD last member query response interval is 1000 ms
MLD immediate-leave is enabled for all groups
MLD activity: 0 joins
MLD querying router is 35::1 (this system)
MLD version is 2
Selecting an IGMP Version
Dell EMC Networking OS enables IGMP version 2 by default, which supports version 1 and 2 hosts, but is not compatible with
version 3 on the same subnet.
If hosts require IGMP version 3, you can switch to IGMP version 3.
To switch to version 3, use the following command.
Switch to a different IGMP version.
INTERFACE mode
ip igmp version
Viewing IGMP Groups
To view both learned and statically configured IGMP groups, use the following command.
View both learned and statically configured IGMP groups.
EXEC Privilege mode
show ip igmp groups
show ipv6 mld groups
Dell#show ipv6 mld groups
Total Number of Groups: 1
MLD Connected Group Membership
308
Internet Group Management Protocol (IGMP)