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VSI-specific configuration takes priority over the global configuration. For a VLAN, the
VLAN-specific configuration takes priority over the global configuration.
Setting the IGMP last member query interval globally
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IGMP-snooping view.
igmp-snooping
N/A
3.
Set the IGMP last member
query interval globally.
last-member-query-interval
interval
The default setting is 1
second.
Setting the IGMP last member 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 IGMP last member
query interval for the VLAN or
VSI.
igmp-snooping
last-member-query-interval
interval
The default setting is 1
second.
Configuring IGMP snooping port features
Before you configure IGMP snooping port features, complete the following tasks:
•
Enable IGMP 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 multicast group and 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 multicast groups frequently change, you can set a relatively small value
for the aging timer of the dynamic member ports. If the memberships of multicast groups rarely
change, you can set a relatively large value.
•
If a dynamic router port receives a PIMv2 hello message, the aging timer for the port is specified
by the hello message. In this case, the
router-aging-time
or
igmp-snooping
router-aging-time
command does not take effect on the port.
•
IGMP group-specific queries originated by the Layer 2 device trigger the adjustment of aging
timers for dynamic member ports. If a dynamic member port receives such a query, its aging
timer is set to twice the IGMP last member query interval. For more information about setting
the IGMP last member query interval on the Layer 2 device, see "Setting the IGMP last member
•
You can set the timers globally for all VLANs and VSIs in IGMP-snooping view, for a VSI in VSI
view, or for a VLAN in VLAN view. For a VLAN, the VLAN-specific configuration takes priority
over the global configuration. For a VSI, the VSI-specific configuration takes priority over the
global configuration.