Command Reference Guide

Error! Use the Home tab to apply 見出し 1 to the text that you want to appear here. 128
IGMP configuration
IGMP Snooping allows the switch to forward multicast traffic only to those ports that request it. IGMP
Snooping prevents multicast traffic from being flooded to all ports. The switch learns which server hosts
are interested in receiving multicast traffic, and forwards it only to ports connected to those servers.
IGMP snooping configuration
The following table describes the IGMP Snooping Configuration commands.
Table 140 IGMP Snooping commands
Command
Description
ip igmp snoop timeout <1-255>
Sets the Maximum Response Time (MRT) for IGMP
hosts. MRT is one of the parameters used to determine
the age out period of the IGMP hosts. Increasing the
timeout increases the age out period.
The range is from 1 to 255 seconds. The default is 10
seconds.
Command mode: Global configuration
ip igmp snoop mrouter-timeout <1-600>
Configures the age-out period for the IGMP Mrouters in
the Mrouter table. If the switch does not receive a
General Query from the Mrouter for mrto seconds, the
switch removes the multicast router from its Mrouter
table.
The range is from 1 to 600 seconds. The default is 255
seconds.
Command mode: Global configuration
ip igmp snoop query-interval <1-600>
Sets the IGMP router query interval. The range is 1-600
seconds. The default value is 125.
Command mode: Global configuration
ip igmp snoop robust <2-10>
Configures the IGMP Robustness variable, which allows
you to tune the switch for expected packet loss on the
subnet. If the subnet is expected to be lossy (high rate of
packet loss), then increase the value. The default value
is 2.
Command mode: Global configuration
[no] ip igmp snoop flood
Configures the switch to flood unregistered IP multicast
reports to all ports.
Command mode: Global configuration
[no] ip igmp snoop aggregate
Enables or disables IGMP Membership Report
aggregation. The default is enabled.
Command mode: Global configuration
ip igmp snoop source-ip <IP address>
Configures the source IP address used as a proxy for
IGMP Group Specific Queries.
Command mode: Global configuration
ip igmp snoop vlan <1-4094>
Adds the VLAN to IGMP Snooping.
Command mode: Global configuration
no ip igmp snoop vlan <1-4094>
Removes the VLAN from IGMP Snooping.
Command mode: Global configuration
no ip igmp snoop vlan all
Removes all VLANs from IGMP Snooping.
Command mode: Global configuration
[no] ip igmp snoop vlan <1-4094>
fast-leave
Enables or disables Fastleave processing. Fastleave
allows the switch to immediately remove a port from the
IGMP port list, if the host sends a Leave message, and
the proper conditions are met. This command is disabled
by default.
Command mode: Global configuration
ip igmp snoop enable
Enables IGMP Snooping.
Command mode: Global configuration
no ip igmp snoop enable
Disables IGMP Snooping. This is the default.
Command mode: Global configuration
show ip igmp snoop
Displays the current IGMP Snooping parameters.
Command mode: All