R3303-HP HSR6800 Routers IP Multicast Command Reference

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• igmp last-member-query-interval
• igmp-snooping fast-leave
Examples
# Enable fast-leave processing on GigabitEthernet 2/1/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 2/1/1
[Sysname-GigabitEthernet2/1/1] igmp fast-leave
igmp group-limit
Use igmp group-limit to configure the maximum number of multicast groups that an interface can join.
Use undo igmp group-limit to restore the default.
Syntax
igmp group-limit limit
undo igmp group-limit
Default
The maximum number of multicast groups that an interface can join is 16384.
Views
Interface view
Default command level
2: System level
Parameters
limit: Specifies the maximum number of multicast groups that an interface can join, in the range of 1 to
16384 .
Usage guidelines
This command is effective only on dynamically joined multicast groups but not statically joined multicast
groups.
If the configured limit value is smaller than the number of the existing multicast groups on the current
interface, the system does not automatically remove the multicast groups in excess. To bring this
configuration into effect in this case, you need to use the reset igmp group command to clear the IGMP
group information manually.
The maximum number of multicast groups that a VLAN interface can join is 16384. If more than 16384
multicast groups are configured, only 16384 multicast groups takes effect.
For a device that supports both IGMP snooping and IGMP, you can also use the igmp-snooping
group-limit command to limit the number of multicast groups that an interface can join. However, if you
configure the limit both in a VLAN and on a VLAN interface of this VLAN by using these two commands,
inconsistencies might exist between Layer 2 and Layer 3 table entries. Therefore, HP recommends you to
configure the limit only in the VLAN interface.
Examples
# Allow GigabitEthernet 2/1/1 to join up to 128 multicast groups.
<Sysname> system-view