Supermicro SSE-F3548S - 7.5 Leaving a Multicast Group

Supermicro SSE-F3548S/SSE-F3548SR Configuration User’s Guide
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The “no ip igmp snooping mrouter<interface-type><interface-id>” command can be used
to remove a statically configured router port from a VLAN.
The example below shows the commands used to configure the router ports.
Configure port fx 0/1 as the router port for VLAN 10.
SMIS# configure terminal
SMIS(config)# vlan 10
SMIS(config-vlan)# ip igmp snooping mrouter fx 0/1
SMIS(config-vlan)# end
7.5 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 a port, it does not delete the port from the group entry on the multicast table
immediately. Instead, the switch sends an IGMP group-specific query message on the port that received
the IGMP leave message. If there is any other IGMP host on that port that joined the same multicast
group, the switch will receive an IGMP member report as a response. If no hosts respond on that port, the
switch will assume no other IGMP hosts are connected on that port for the same group and will delete the
corresponding port 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.
Retry Count – This configures the number of times a switch sends a group specific query to look for IGMP
hosts on the port that received an IGMP leave message.
Immediate Leave – This configures the switch to consider the host leave immediately instead of sending
group specific query messages to look for other IGMP hosts on the port that received an IGMP leave
message.
These parameters can be configured as explained below.
7.5.1 Group Query Interval
Switches send a group specific query messages on the port that received an IGMP leave message.
Switches wait for the group query interval time to get a response from the hosts for its group specific
query messages. If they receive any host member report as a response, they will drop the leave message