Use the show ip igmp router-alert command to display the status of IGMP router alert. The syntax for this command is as follows.
show ip igmp router-alert [vrf WORD <0-16>] [vrfids WORD <0-512>]

Note
This command is not supported on a node configured as the DvR Leaf within the DvR domain.
The following table shows the field descriptions for this command.
| Field | Description | 
|---|---|
| IFINDEX | Indicates the interface index number. | 
| ROUTER ALERT ENABLE | Indicates the status of the router alert check. |