Edge-Core ECS4120-28F, Reference Manual, Page: 670 / 938

Chapter 24
| Multicast Filtering Commands
IGMP Filtering and Throttling
– 670 –
ip igmp max-groups
This command sets the IGMP throttling number for an interface on the switch. Use
the
no form to restore the default setting.
Syntax
ip igmp max-groups number
no ip igmp max-groups
number - The maximum number of multicast groups an interface can join at
the same time. (Range: 1-255)
Default Setting
1024
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
◆
IGMP throttling sets a maximum number of multicast groups that a port can
join at the same time. When the maximum number of groups is reached on a
port, the switch can take one of two actions; either “deny” or “replace”
(
see the
ip igmp max-groups action command
).
If the action is set to deny, any new
IGMP join reports will be dropped. If the action is set to replace, the switch
randomly removes an existing group and replaces it with the new multicast
group.
◆
IGMP throttling can also be set on a trunk interface. When ports are configured
as trunk members, the trunk uses the throttling settings of the first port
member in the trunk.
Example
Console(config)#interface ethernet 1/1
Console(config-if)#ip igmp max-groups 10
Console(config-if)#
ip igmp max-groups
action
This command sets the IGMP throttling action for an interface on the switch.
Syntax
ip igmp max-groups action { deny | replace }
deny - The new multicast group join report is dropped.
replace - The new multicast group replaces an existing group.
Default Setting
Deny