Huawei Quidway S8500 Series Command Manual page 538

Command Manual – Multicast Protocol
Quidway S8500 Series Routing Switches
Note:
Fast leaves that are configured in system view and Ethernet port view operate
separately.
Fast leave works on all ports of the specified VLANs if you configure it in system
view. However, it only works on the current port (e.g., when a Trunk port belong to
multiple VLANs) in the specified VLANs if you configure it in Ethernet port view.
Caution:
Fast leave configured for a port takes effect only when the VLAN it belongs to is
IGMP-enabled.
Fast leave does not work if the corresponding specified VLANs do not exist, the port
does not belongs to any of the specified VLANs, or the VLANs do not have IGMP
enabled.
You can enable multicast routing globally by executing the multicast
routing-enable command before you can configure the fast leave feature.
Disabling globally-enabled multicast routing results in all existing IGMP fast
leave-related configurations being cleared.
When you configure IGMP fast leave on aggregation ports, the configuration takes
effect only on primary aggregation ports.
If you add an IGMP V1 host of the same multicast group to the port, or configure a
static host of the same multicast group by using the igmp host-join command, the
switch does not remove the port when the port receives an IGMP Leave packet of
the multicast group even you enable IGMP fast leave for the port.
Fast leave is disabled by default.
Example
# Enable IGMP fast leave on the Ethernet2/1/1 port in VLAN 5 only.
<Quidway> system-view
System View: return to User View with Ctrl+Z.
[Quidway]interface Ethernet2/1/1
[Quidway-Ethernet2/1/1] igmp fast-leave vlan 5
# Disable IGMP fast leave on the Ethernet2/1/1 port in all VLANs.
<Quidway> system-view
System View: return to User View with Ctrl+Z.
[Quidway] interface Ethernet2/1/1
[Quidway-Ethernet2/1/1] undo igmp fast-leave
Huawei Technologies Proprietary
4-6
Chapter 4 IGMP Configuration Commands