H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 17)

8
Configuring basic functions of IGMP snooping
Before you configure the basic functions of IGMP snooping, complete the following tasks:
• Configure the corresponding VLANs
• Determine the version of IGMP snooping
Enabling IGMP snooping
When you enable IGMP snooping, follow these guidelines:
• You must enable IGMP snooping globally before you enable it in a VLAN.
• When you enable IGMP snooping in a specified VLAN, IGMP snooping works only on the Ethernet
ports and WLAN-ESS interfaces in this VLAN.
To enable IGMP snooping:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable IGMP snooping globally
and enter IGMP-snooping view.
igmp-snooping Disabled by default
3. Return to system view. quit N/A
4. Enter VLAN view. vlan vlan-id N/A
5. Enable IGMP snooping in the
VLAN.
igmp-snooping enable Disabled by default
Configuring the IGMP snooping version
By configuring an IGMP snooping version, you actually configure the version of IGMP messages that
IGMP snooping can process.
• IGMPv2 snooping can process IGMPv1 and IGMPv2 messages, but cannot process IGMPv3
messages, which will be flooded in the VLAN.
• IGMPv3 snooping can process IGMPv1, IGMPv2, and IGMPv3 messages.
Configuration guidelines
If you change IGMPv3 snooping to IGMPv2 snooping, the system:
• 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 joins, see " Configuring static ports ."
Configuration procedure
To configure the version of IGMP snooping:
Step Command Remarks
1. Enter system view. system-view N/A