| 8.4 |  | Routing and Multicast Configuration |
| 8.4.6 |  | View and debug SMR |

| The following commands can be used to view the current multicast and IGMP configuration :

- show multicast - Displays all or per-interface multicast settings. This command also displays IGMP configuration for the interface.
- show igmp - Displays multicast-related information about one or more groups.
- show mroute - Displays multicast routes.

The syntax for these show commands is as follows :

> show multicast [interface interface_name]

> show igmp [group | interface interface_name] [detail]

> show mroute [dst [src]]

The following commands can be used for debugging the Stub Multicast Routing (SMR) configuration :

- debug igmp - Enables debugging for IGMP events.
- debug mfwd - Enables debugging for multicast forwarding events.

Each of these commands can be removed by using its no form.