Technical data

RackSwitch G8000 ISCLI Reference
Chapter 4: Configuration Commands
 153BMD00128, September 2009
IGMP Snooping 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 the
multicast traffic only to ports connected to those servers.
Table 4-46 describes the commands used to configure IGMP Snooping.
Table 4-46 IGMP Snooping Configuration Commands
Command Syntax and Usage
[no] ip igmp snoop enable
Enables or disables IGMP Snooping.
Command mode: Global configuration
ip igmp snoop timeout <130-1225>
Configures the timeout value for IGMP Membership Queries (mrouter). Once the timeout value
is reached, the switch removes the multicast router from its IGMP table, if the proper conditions
are met. The default value is 260.
Command mode: Global configuration
ip igmp snoop mrouter-timeout <1-600>
Configures the timeout value for IGMP Membership Queries (mrouter). Once the timeout value
is reached, the switch removes the multicast router from its IGMP table, if the proper conditions
are met. The default value is 255 seconds.
Command mode: Global configuration
ip igmp snoop query-interval <1-600>
Sets the IGMP router query interval, in 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), 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.
The default setting is enabled.
Command mode: Global configuration