H3C Technologies H3C S12500-X Series Switches - Manual (Page 122)

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Step Command Remarks
3. Specify the IGMP snooping
version for the specified
VLANs
version version-number vlan vlan-list
The default setting is MLDv1
snooping.
To specify the MLD snooping version for a VLAN 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 MLD
snooping.
mld-snooping version
version-number The default setting is MLDv1
snooping.
Setting the maximum number of MLD snooping forwarding
entries
You can modify the maximum number of MLD snooping forwarding entries. When the number of
forwarding entries on the device reaches the upper limit, the device does not automatically remove any
existing entries or create new entries until some entries time out or are removed. In this case, H3C
recommends that you manually remove excessive entries.
To set the maximum number of MLD snooping forwarding entries:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter MLD-snooping view. mld-snooping N/A
3. Set the maximum number of
MLD snooping forwarding
entries.
entry-limit limit
The default setting is
4294967295.
Configuring parameters for MLD queries and responses
When a multicast listening host receives an MLD query (general query or multicast-address-specific
query), it starts a timer for each IPv6 multicast group that it has joined. This timer is initialized to a
random value in the range of 0 to the maximum response delay advertised in the MLD query message.
When the timer value decreases to 0, the host sends an MLD report to the IPv6 multicast group.
To speed up the response of hosts to MLD queries and avoid simultaneous timer expirations causing MLD
report traffic bursts, you must correctly set the maximum response delay.
• The maximum response delay for MLD general queries is set by the max-response-time command.
• The maximum response delay for MLD multicast-address-specific queries is the same as the MLD
last-listener query interval, which is set by the last-listener-query-interval command.
You can configure parameters for MLD queries and responses either for the current VLAN in VLAN view
or globally for all VLANs in MLD-snooping view. If the configurations are made in both VLAN view and
MLD-snooping view, the configuration made in VLAN view takes priority.