3com 8807 참조 가이드

n 

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Fast leaves that are configured in system view and Ethernet port view operate 
separately.

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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.

c 

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Fast leave configured for a port takes effect only when the VLAN it belongs to 
is IGMP-enabled.

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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.

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You can enable multicast routing globally by executing the multicast 
routing-enable command before you can configure the fast leave feature.

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Disabling globally-enabled multicast routing results in all existing IGMP fast 
leave-related configurations being cleared.

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When you configure IGMP fast leave on aggregation ports, the configuration 
takes effect only on primary aggregation ports.

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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.

# Enable IGMP fast leave on the Ethernet2/1/1 port in VLAN 5 only.

<SW8800> system-view

 

System View: return to User View with Ctrl+Z.

 

[SW8800]interface Ethernet2/1/1

 

[3Com-Ethernet2/1/1] igmp fast-leave vlan 5 

# Disable IGMP fast leave on the Ethernet2/1/1 port in all VLANs.

<SW8800> system-view

 

System View: return to User View with Ctrl+Z.

 

[SW8800] interface Ethernet2/1/1

 

[3Com-Ethernet2/1/1] undo igmp fast-leave 

# Enable IGMP fast leave on all Ethernet ports in VLAN 5.

<SW8800> system-view

 

System View: return to User View with Ctrl+Z.

 

[SW8800] igmp fast-leave vlan 5 

# Enable IGMP fast leave for on all Ethernet ports except those in VLAN 5.