H3C Technologies H3C S12500 Series Switches - Manual (Page 310)

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Step Command Remarks
3. Configure the port as a
simulated member host.
mld-snooping host-join
ipv6-group-address [ source-ip
ipv6-source-address ] vlan vlan-id
A port is not a simulated member
host by default.
NOTE:
Unlike a static member port, a port configured as a simulated member host will age out like a dynamic
member port.
Enabling MLD snooping fast-leave processing
The MLD snooping fast-leave processing feature enables the switch to process MLD done messages
quickly. After the MLD snooping fast-leave processing feature is enabled, when the switch receives an
MLD done message on a port, it immediately removes that port from the forwarding entry for the
multicast group specified in the message. Then, when the switch receives MLD multicast-address-specific
queries for that multicast group, it does not forward them to that port.
On a port that has only one host attached, you can enable MLD snooping fast-leave processing to save
bandwidth and resources. However, on a port that has multiple hosts attached, do not enable MLD
snooping fast-leave processing if you have enabled dropping unknown IPv6 multicast data globally or
for the port. Otherwise, if a host on the port leaves an IPv6 multicast group, the other hosts attached to
the port in the same IPv6 multicast group cannot receive the IPv6 multicast data for the group.
Enabling MLD snooping fast-leave processing globally
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter MLD-snooping view. mld-snooping N/A
3. Enable fast-leave processing. fast-leave [ vlan vlan-list ] Disabled by default.
Enabling MLD snooping fast-leave processing on a port
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view, or
enter port group view.
• Enter Layer 2 Ethernet interface
view or Layer 2 aggregate
interface view:
interface interface-type
interface-number
• Enter port group view:
port-group manual
port-group-name
Use either method.
3. Enable fast-leave processing. mld-snooping fast-leave [ vlan
vlan-list ]
Disabled by default.