Specifying an IGMP snooping version
Different IGMP snooping versions can process different versions of IGMP messages.
IGMPv2 snooping can process IGMPv1 and IGMPv2 messages, but it floods IGMPv3 messages in the VLAN instead of processing them.
IGMPv3 snooping can process IGMPv1, IGMPv2, and IGMPv3 messages.
If you change IGMPv3 snooping to IGMPv2 snooping, the device does the following:
Clears all IGMP snooping forwarding entries that are dynamically added.
Keeps static IGMPv3 snooping forwarding entries (*, G).
Clears static IGMPv3 snooping forwarding entries (S, G), which will be restored when IGMP snooping is switched back to IGMPv3 snooping.
For more information about static IGMP snooping forwarding entries, see "Configuring static ports."
You can specify the version for the specified VLANs in IGMP-snooping view or for a VLAN in VLAN view. For a VLAN, the configuration in VLAN view has the same priority as the configuration in IGMP-snooping view, and the most recent configuration takes effect.
Specifying an IGMP snooping version in IGMP-snooping view
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
| igmp-snooping | N/A |
| version version-number vlan vlan-list | The default setting is IGMPv2 snooping. |
Specifying an IGMP snooping version in VLAN view
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter VLAN view. | vlan vlan-id | N/A |
3. Specify the version of IGMP snooping. | igmp-snooping version version-number | The default setting is IGMPv2 snooping. |