Configure the router to ignore Internet Group Management Protocol (IGMP) packets that do not contain the router alert IP option. The default is disabled. When disabled, the router processes IGMP packets regardless of the status of the router alert IP option.
default ip igmp router-alert
ip igmp router-alert
no ip igmp router-alert
Disabled
VLAN Interface Configuration
To maximize network performance, configure this parameter according to the version of IGMP currently in use:
IGMPv1 - Disable
IGMPv2 - Enable
IGMPv3 - Enable