This command displays IGMP Snooping information for a given unit/slot/port or VLAN. Configured information is displayed whether or not IGMP Snooping is enabled.
| Format | show igmpsnooping [unit/slot/port | vlan_id] |
| Mode | Privileged EXEC |
When the optional arguments unit/slot/port or vlan_id are not used, the command displays the following information:
| Parameter | Description |
|---|---|
| Admin Mode | Indicates whether or not IGMP Snooping is active on the switch. |
| Multicast Control Frame Count | The number of multicast control frames that are processed by the CPU. |
| Interface Enabled for IGMP Snooping | The list of interfaces on which IGMP Snooping is enabled. |
| VLANS Enabled for IGMP Snooping | The list of VLANS on which IGMP Snooping is enabled. |
| Report Flood Mode | Indicates whether the mode is enabled or disabled. |
| Exclude Mrouter Interface Mode | Indicates whether the mode is enabled or disabled. |
| Operational Mode | Indicates whether the mode is enabled or disabled. |
| Fast Leave Auto-Assignment Mode | Indicates whether the mode is enabled or disabled. |
| IGMP-Plus | Indicates whether the mode is enabled or disabled. |
When you specify the unit/slot/port values, the following information appears.
| Parameter | Description |
|---|---|
| IGMP Snooping Admin Mode | Indicates whether IGMP Snooping is active on the interface. |
| Fast Leave Mode | Indicates whether IGMP Snooping Fast-leave is active on the interface. |
| Group Membership Interval | The amount of time in seconds that a switch will wait for a report from a particular group on a particular interface before deleting the interface from the entry.This value may be configured. |
| Maximum Response Time | The amount of time the switch waits after it sends a query on an interface because it did not receive a report for a particular group on that interface. This value may be configured. |
| Multicast Router Expiry Time | The amount of time to wait before removing an interface from the list of interfaces with multicast routers attached. The interface is removed if a query is not received. This value may be configured. |
When you specify a value for vlan_id, the following information appears.
| Parameter | Description |
|---|---|
| VLAN ID | The VLAN ID. |
| IGMP Snooping Admin Mode | Indicates whether IGMP Snooping is active on the VLAN. |
| Fast Leave Mode | Indicates whether IGMP Snooping Fast-leave is active on the VLAN. |
| Group Membership Interval (secs) | The amount of time in seconds that a switch will wait for a report from a particular group on a particular interface, which is participating in the VLAN, before deleting the interface from the entry.This value may be configured. |
| Maximum Response Time secs) | The amount of time the switch waits after it sends a query on an interface, participating in the VLAN, because it did not receive a report for a particular group on that interface. This value may be configured. |
| Multicast Router Expiry Time (secs) | The amount of time to wait before removing an interface that is participating in the VLAN from the list of interfaces with multicast routers attached. The interface is removed if a query is not received. This value may be configured. |
| Report Suppression Mode | Indicates whether IGMP reports (set by the command set igmp report-suppression) is enabled or not. |
Example: The following shows example CLI display output for the command at the Global level.
(Switching)#show igmpsnooping Admin Mode..................................... Enable Multicast Control Frame Count.................. 0 IGMP header validation......................... Enabled Interfaces Enabled for IGMP Snooping........... None VLANs enabled for IGMP snooping................ 1 Report Flood Mode.............................. Enabled Exclude Mrouter Interface Mode................. Enabled Operational Mode............................... Enable Fast Leave Auto-Assignment Mode................ Enable IGMP-Plus...................................... Enabled VLAN ID........................................ 1 IGMP Snooping Admin Mode....................... Enabled Fast Leave Mode................................ Enabled Group Membership Interval (secs)............... 600 Max Response Time (secs)....................... 120 Multicast Router Expiry Time (secs)............ 300 Report Suppression Mode........................ Disabled Report Flood Mode.............................. Enabled Exclude Mrouter Interface Mode................. Enabled IGMP-Plus...................................... Enabled
Example: The following shows example CLI display output for the command at the VLAN level.
(Switching) #show igmpsnooping 1 VLAN ID........................................ 1 IGMP Snooping Admin Mode....................... Enabled Fast Leave Mode................................ Enabled Group Membership Interval (secs)............... 600 Max Response Time (secs)....................... 120 Multicast Router Expiry Time (secs)............ 300 Report Suppression Mode........................ Disabled Report Flood Mode.............................. Enabled Exclude Mrouter Interface Mode................. Enabled IGMP-Plus...................................... Enabled
