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Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 16 Configuring IGMP Snooping and MVR
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 by using the ip igmp
mac-groups interface configuration command. Use the no form of this command to set the maximum
back to the default, which is no limit.
You cannot use this command on ports that belong to an EtherChannel port group.
Beginning in privileged EXEC mode, follow these steps to apply an IGMP profile to a switch port:
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 25.
Switch(config)# interface fastethernet0/12
Switch(config-if)# ip igmp max-groups 25
Switch(config-if)# end
Switch# show running-config interface fastethernet0/12
Building configuration...
Current configuration : 123 bytes
!
interface FastEthernet0/12
no ip address
shutdown
snmp trap link-status
ip igmp max-groups 25
ip igmp filter 4
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 that does not belong to an EtherChannel group.
Step 3
ip igmp max-groups number Set the maximum number of IGMP groups that the interface can join.
The range is from 0 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.