Leaving A Multicast Group - Supermicro SSE-G24-TG4 Configuration Manual

IGMP Configuration Guide
SMIS(config)#interface vlan 10
SMIS(config-if)# ip igmp robustness 10
SMIS(config-if)# end
SMIS# show ip igmp interface
vlan10, line protocol is up
Internet address is 2.2.2.2/8
IGMP is enabled on the interface
Current IGMP router version is 2
IGMP query interval is 125 seconds
Last member query response interval is 10 seconds
IGMP max query response time is 100 seconds
Robustness value is 10
IGMP querying router is 2.2.2.2 (this system)
Fast leave is disabled on this interface
No multicast groups joined

1.8 Leaving a Multicast Group

Host computers leave multicast groups either silently or by sending IGMP leave messages. Switches
monitor the IGMP leave messages sent by host computers. When a switch receives an IGMP leave
message for any group on an interface, it does not immediately delete the interface from the group
entry on the multicast table. Instead, the switch sends an IGMP group-specific query message on the
interface that received the IGMP leave message. If there are any other IGMP hosts on that interface that
joined the same multicast group, the switch will receive an IGMP member report as a response. If no
hosts respond on that interface, the switch will assume that no other IGMP hosts are connected on that
interface for the same group and will delete the corresponding interface from the group entry on the
multicast table.
Switches follow the above process only for IGMP version 2 leave messages.
The following parameters are used to control the leave message handling procedure in Supermicro
switches.
Group Query Interval – This configures the amount of time a switch will wait to get response for its
group specific queries from IGMP hosts.
Immediate Leave – This configures the switch to have the host leave immediately instead of sending
group specific query messages to look for other IGMP hosts on the interface that received an IGMP
leave message.
These parameters can be configured as explained below.
Supermicro L2/L3 Switches Configuration Guide 18