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Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
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Chapter 6 Configuring the System
Configuring IGMP Filtering
Setting the Maximum Number of IGMP Groups
You can set the maximum number of IGMP groups that a Layer 2 interface can join. Use the no form of
this command to set the maximum back to the default, which is no limit.
Beginning in privileged EXEC mode, follow these steps to set the maximum number of IGMP groups
for an interface:
To remove the maximum group limitation and return to the default of no maximum, use the no ip igmp
max-groups interface configuration command.
This example shows how to limit the number of IGMP groups that an interface can join to 20.
Switch# config t
Switch(config)# interface fastethernet 0/12
Switch(config-if)# ip igmp max-groups 20
Switch(config-if)# end
Switch# show running-config interface fastethernet 0/12
Building configuration...
Current configuration : 124 bytes
!
interface FastEthernet0/12
no ip address
shutdown
snmp trap link-status
ip igmp max-groups 25
ip igmp filter 22
end
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
interface interface-id
Enter interface configuration mode, and enter the physical interface to
configure, for example gigabitethernet0/1. The interface must be a Layer 2
port.
Step 3
ip igmp max-groups number
Set the maximum number of IGMP groups which the interface can join. The
range is from 1 to 4294967294. The default is to have no maximum set.
Step 4
end
Return to privileged EXEC mode.
Step 5
show running configuration
interface interface-id
Verify the configuration.
Step 6
copy running-config startup-config
(Optional) Save your entries in the configuration file.
