Users Guide

● 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
DellEMC#show ip igmp interface TenGigabitEthernet 1/10/1
Inbound IGMP access group is not set
Internet address is 165.87.34.5/24
IGMP is up on the interface
IGMP query interval is 60 seconds
IGMP querier timeout is 0 seconds
IGMP max query response time is 10 seconds
IGMP last member query response interval is 1000 ms
IGMP immediate-leave is disabled
IGMP activity: 2 joins
IGMP querying router is 165.87.34.5 (this system)
IGMP version is 2
DellEMC#
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
354
Internet Group Management Protocol (IGMP)