N8406-023 1Gb Intelligent L3 Switch Command Reference Guide (ISCLI) 126
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 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 except User EXEC