3Com S7902E, Configuration Manual

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MLD snooping must be enabled globally before it can be enabled in a VLAN.
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After enabling MLD snooping in a VLAN, you cannot enable MLD and/or IPv6 PIM on the
corresponding VLAN interface, and vice versa.
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When you enable MLD snooping in a specified VLAN, this function takes effect for ports in this
VLAN only.
Configuring the Version of MLD Snooping
By configuring the MLD snooping version, you actually configure the version of MLD messages that
MLD snooping can process.
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MLD snooping version 1 can process MLDv1 messages, but cannot analyze and process MLDv2
messages, which will be flooded in the VLAN.
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MLD snooping version 2 can process MLDv1 and MLDv2 messages.
Follow these steps to configure the version of MLD snooping:
To do… Use the command… Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —
Configure the version of MLD
snooping mld-snooping version
version-number
Optional
Version 1 by default
If you switch MLD snooping from version 2 to version 1, the system will clear all MLD snooping
forwarding entries from dynamic joining, and will:
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Keep forwarding entries from version 2 static (*, G) joining;
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Clear forwarding entries from version 2 static (S, G) joining, which will be restored when MLD
snooping is switched back to version 2.
For details about static joining, refer to Configuring Static Ports .
Configuring Limit on the Number of Forwarding Entries Globally
You can onfigure the maximum number of entries in the MLD snooping forwarding table. When the
number of forwarding entries maintained by the device reaches the threshold, the device creates no
more forwarding entries until the some entries time out or get manually removed.
Follow these steps to configure the maximum number of entries in the forwarding table:
To do... Use the command... Remarks
Enter system view system-view —