Supermicro SSE-F3548S - 7.4 Multicast Router Ports

Supermicro SSE-F3548S/SSE-F3548SR Configuration User’s Guide
196
SMIS(config-vlan)# exit
SMIS(config)# vlan 20
SMIS(config-vlan)# ip igmp snooping version v2
SMIS(config-vlan)# end
7.4 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.
7.4.1 Router Port Timeouts
After finding the router ports, switches expect to periodically receive IGMP control messages from them.
If IGMP receives no control messages 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
Description
Step 1
configure terminal
Enters the configuration mode.
Step 2
ip igmp snooping mrouter-time-out<timeout>
Configures the router port timeout
value in seconds.
timeout – may be any value from 60 to
600 seconds.
The default value is 125 seconds.
Step 3
end
Exits the configuration mode.
Step 4
show ip igmp snooping globals
Displays the IGMP snooping router port
timeoutinformation.
Step 5
write startup-config
Optional step – saves this IGMP
snooping configuration to be part of
the startup configuration.
The “no ip igmp snooping mrouter-time-out” command resets the router timeout value to
its default value of 125 seconds.
The example below shows the commands used to configure the router port timeout value.
Configure the router port timeout value as 90 seconds.
SMIS# configure terminal