3com MSR 20-20 참조 매뉴얼

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This command can take effect only after IPv6 multicast routing is enabled on 
the device.

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Other MLD configurations performed on the interface can take effect only after 
MLD is enabled on the interface.

# Enable MLD on Ethernet 1/0.

<Sysname> system-view

[Sysname] interface ethernet 1/0

[Sysname-Ethernet1/0] mld enable 

mld fast-leave [ group-policy acl6-number ]

Interface view

acl6-number: Number of a basic IPv6 ACL, in the range of 2000 to 2999. If you do 
not specify any IPv6 ACL number, this command will take effect for all IPv6 
multicast groups.

Use the mld fast-leave command to enable the fast-leave function on the 
current interface for IPv6 multicast group members.

Use the undo mld fast-leave command to disable the fast-leave function on the 
current interface for IPv6 multicast group members.

By default, the fast-leave function for IPv6 multicast group members is disabled, 
that is, the MLD querier sends a multicast-address-specific query upon receiving an 
MLD done message from a host, instead of sending a leave notification directly to 
the upstream.

fast-leave (MLD view), mld last-listener-query-interval.

# Enable the fast-leave function for IPv6 multicast group members on Ethernet 
1/0.

<Sysname> system-view

[Sysname] interface ethernet 1/0

[Sysname-Ethernet1/0] mld fast-leave 

mld group-policy acl6-number [ version-number ]