C613-50170-01 Rev B
Command Reference for x510 Series
1203
AlliedWare Plus™ Operating System - Version 5.4.7-1.x
IGMP
AND
IGMP S
NOOPING
C
OMMANDS
IP
IGMP
MAXIMUM
-
GROUPS
ip igmp maximum-groups
Overview
Use this command to set a limit, per switch port, on the number of IGMP groups
clients can join. This stops a single client from using all the switch’s available
group-entry resources, and ensures that clients on all ports have a chance to join
IGMP groups.
Use the
no
variant of this command to remove the limit.
Syntax
ip igmp maximum-groups <
0-65535
>
no ip igmp maximum-groups
Default
The default is 0, which means no limit
Mode
Interface mode for a switch port
Usage
We recommend using this command with IGMP snooping fast leave on the
relevant VLANs. To enable fast leave, use the command:
awplus(config-if)#
ip igmp snooping fast-leave
The device keeps count of the number of groups learned by each port. This counter
is incremented when group joins are received via IGMP reports. It is decremented
when:
•
Group memberships time out
•
Group leaves are received via leave messages or reports
Also, the port's group counter is cleared when:
•
The port goes down
•
You run the command
clear ip igmp group *
•
The port is removed from a VLAN
•
The port is on a VCStack back-up member, and that member reboots or
otherwise leaves the stack.
You can see the current value of the group counter by using either of the
commands:
awplus#
show ip igmp snooping statistics interface <
port-list
>
awplus#
show ip igmp interface <
port
>
Parameter
Description
<0-65535>
The maximum number of IGMP groups clients can join on this
switch port. 0 means no limit.
