H3C Technologies H3C S12500 Series Switches - Manual (Page 306)

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not make the same configuration in Layer 2 Ethernet interface view, Layer 2 aggregate interface
view, or port group view.
• For MLD snooping, the configurations made on a Layer 2 aggregate interface do not interfere with
the configurations made on its member ports, nor do they participate in aggregation calculations.
A configuration made on a member port of the aggregate group will take effect after the port leaves
the aggregate group.
Configuring basic MLD snooping functions
Before you configure basic MLD snooping functions, complete the following tasks:
• Enable IPv6 forwarding.
• Configure the corresponding VLANs.
• Determine the version of MLD snooping.
Enabling MLD snooping
When you enable MLD snooping, follow these guidelines:
• You must enable MLD snooping globally before you enable it in a VLAN.
• If you enable MLD snooping for a VLAN, do not enable MLD or IPv6 PIM on the corresponding
VLAN interface. If you enable MLD or IPv6 PIM for a VLAN interface, do not enable MLD snooping
for the VLAN.
• MLD snooping for a VLAN works only on the ports in this VLAN.
To enable MLD snooping:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable MLD snooping
globally and enter
MLD-snooping view.
mld-snooping Disabled by default.
3. Return to system view. quit N/A
4. Enter VLAN view. vlan vlan-id N/A
5. Enable MLD snooping in the
VLAN.
mld-snooping enable Disabled by default.
Specifying MLD snooping version
Different versions of MLD snooping can process different versions of MLD messages:
• MLDv1 snooping can process MLDv1 messages, but flood MLDv2 messages in the VLAN instead
of processing them.
• MLDv2 snooping can process MLDv1 and MLDv2 messages.
If you change MLDv2 snooping to MLDv1 snooping, the system does the following:
• Clears all MLD snooping forwarding entries that are dynamically created.
• Keeps static MLDv2 snooping forwarding entries (*, G).