H3C Technologies H3C S12500-X Series Switches - Manual (Page 29)

19
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable IGMP snooping
globally and enter
IGMP-snooping view.
igmp-snooping By default, IGMP snooping is disabled.
3. Enable IGMP snooping for
specified VLANs.
enable vlan vlan-list
By default, IGMP snooping is disabled for a
VLAN.
To enable IGMP snooping for a VLAN in VLAN view:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable IGMP snooping
globally and enter
IGMP-snooping view.
igmp-snooping
By default, IGMP snooping is
disabled.
3. Return to system view. quit N/A
4. Enter VLAN view. vlan vlan-id N/A
5. Enable IGMP snooping for the
VLAN.
igmp-snooping enable
By default, IGMP snooping is
disabled for a VLAN.
Specifying the IGMP snooping version
Different versions of IGMP snooping 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 IGMP snooping version for a VLAN in IGMP-snooping view or in VLAN view. The
two configurations have the same priority level.
To specify the IGMP snooping version for a VLAN in IGMP-snooping view:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable IGMP snooping
globally and enter
IGMP-snooping view.
igmp-snooping N/A