310 
Example 
Specify the maximum numbers of groups that ports 1/0/2-5 can join as 10, and 
configure the throttling action as replace: 
T2600G-28TS(config)#interface range gigabitEthernet 1/0/2-5 
T2600G-28TS(config-if-range)#ip igmp snooping max-groups 10 
T2600G-28TS(config-if-range)#ip igmp snooping max-groups action 
replace 
37.18 ip igmp snooping authentication 
Description 
The ip igmp snooping authenticaiton command is used to authenticate the 
users who want to join the limited multicast source. To  disable the multicast 
authentication, please use no ip igmp snooping authentication command. 
Syntax 
ip igmp snooping authentication 
no ip igmp snooping authentication 
Command Mode 
Interface Configuration Mode (interface gigabitEthernet / interface range 
gigabitEthernet / interface port-channel / interface range port-channel)   
Privilege Requirement 
Only Admin, Operator and Power User level users have access to these 
commands. 
User Guidelines 
The  IGMP Authentication feature will take effect only when AAA function is 
enabled and the RADIUS server is configured. For how to enable AAA function 
and configure RADIUS server, please refer to aaa enable  and  radius-server 
host. 
Example 
Enable IGMP authentication on port 1/0/3: 
T2600G-28TS(config)# interface gigabitEthernet 1/0/3 
T2600G-28TS(config-if)# ip igmp snooping authentication