Multicast Router Port; Router Port Timeout - Supermicro SSE-G24-TG4 Configuration Manual

IGMP Snooping Configuration Guide
SMIS# configure terminal
SMIS(config)# vlan 10
SMIS(config-vlan)# ip igmp snooping version v3
SMIS(config-vlan)# exit
SMIS(config)# vlan 20
SMIS(config-vlan)# ip igmp snooping version v2
SMIS(config-vlan)# end
1.6 Multicast Router Ports
Supermicro switches monitor the IGMP control messages sent by IGMP routers and recognize the ports
that receive IGMP router messages as router ports.
A switch forwards the IGMP member reports from the host computers to only the router ports. If a
switch does not recognize any router ports, it forwards the host computers' IGMP reports to all ports
except the one that received the host report's message.
1.6.1 Router Port Timeouts
After finding the router ports, switches expect to periodically receive IGMP control messages from
them. If IGMP receives no control messages are for a period of time from any router port, a switch will
stop considering those ports as router ports until IGMP control messages are received again. This period
of time is called the router port timeout value.
By default, Supermicro switches have a router port timeout value of 125 seconds. This value can be
changed by following the steps below.
Step Command
Step 1 configure terminal
Step 2 ip igmp snooping mrouter-time-out <timeout>
Step 3 end
show ip igmp snooping globals
Step 4
Step 5 write startup-config
The "no ip igmp snooping mrouter-time-out" command resets the router timeout value to
its default value of 125 seconds.
Description
Enters the configuration mode.
Configures the router port timeout
value in seconds.
timeout – may be any value from 60 to
600 seconds.
The default value is 125 seconds.
Exits the configuration mode.
Displays the IGMP snooping router port
timeout information.
Optional step – saves this IGMP
snooping configuration to be part of
the startup configuration.
Supermicro L2/L3 Switches Configuration Guide 9