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Configuration restrictions and guidelines
When you set the MLD last listener query interval, follow these restrictions and guidelines:
•
The Layer 2 device does not send an MLD multicast-address-specific query if it receives an
MLD done message from a port enabled with fast-leave processing.
•
You can set the MLD last listener query interval globally for all VLANs and VSIs in
MLD-snooping view, for a VSI in VSI view, or for a VLAN in VLAN view. For a VSI, the
VSI-specific configuration takes priority over the global configuration. For a VLAN, the
VLAN-specific configuration takes priority over the global configuration.
Setting the MLD last listener query interval globally
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter MLD-snooping view.
mld-snooping
N/A
3.
Set the MLD last listener
query interval globally.
last-listener-query-interval
interval
The default setting is 1
second.
Setting the MLD last listener query interval in a VLAN or VSI
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter VLAN view or VSI
view.
•
Enter VLAN view:
vlan vlan-id
•
Enter VSI view:
vsi
vsi-name
N/A
3.
Set the MLD last listener
query interval in the VLAN or
VSI.
mld-snooping
last-listener-query-interval
interval
The default setting is 1
second.
Configuring MLD snooping port features
Before you configure MLD snooping port features, complete the following tasks:
•
Enable MLD snooping for the VLAN or VSI.
•
Determine the aging timer for dynamic router ports.
•
Determine the aging timer for dynamic member ports.
•
Determine the addresses of the IPv6 multicast group and IPv6 multicast source.
Setting aging timers for dynamic ports
When you set aging timers for dynamic ports, follow these restrictions and guidelines:
•
If the memberships of IPv6 multicast groups frequently change, set a relatively small value for
the aging timer of the dynamic member ports. If the memberships of IPv6 multicast groups
rarely change, you can set a relatively large value.
•
If a dynamic router port receives an IPv6 PIMv2 hello message, the aging timer for the port is
specified by the hello message. In this case, the
mld-snooping router-aging-time
command
does not take effect on the port.
•
MLD multicast-address-specific queries originated by the Layer 2 device trigger the adjustment
of aging timers of dynamic member ports. If a dynamic member port receives such a query, its
aging timer is set to twice the MLD last listener query interval. For more information about
