3com S7906E 安装指导

 

1-14 

z 

Each simulated host is equivalent to an independent host. For example, when receiving an MLD 

query, the simulated host corresponding to each configuration responds respectively.  

z 

Unlike a static member port, a port configured as a simulated member host will age out like a 

dynamic member port.  

 

The fast leave processing feature allows the switch to process MLD done messages in a fast way. With 

the fast leave processing feature enabled, when receiving an MLD done message on a port, the switch 

immediately removes that port from the outgoing port list of the forwarding table entry for the indicated 

IPv6 multicast group. Then, when receiving MLD done multicast-address-specific queries for that IPv6 

multicast group, the switch will not forward them to that port.  

In VLANs where only one host is attached to each port, fast leave processing helps improve bandwidth 

and resource usage. However, if fast leave processing is enabled on a port to which more than one host 

is attached, when one host leaves a multicast group, the other hosts attached to the port and interested 

in the same multicast group will fail to receive multicast data for that group. Therefore, if the function of 

dropping unknown IPv6 multicast traffic is already enabled on the switch or in the VLANs, the fast leave 

processing function should not be enabled. 

Follow these steps to configure fast leave processing globally:  

Enter system view 

— 

Enter MLD snooping view 

— 

Enable fast leave processing  

fast-leave [ vlan vlan-list ] 

Required 

Disabled by default  

 

Follow these steps to configure fast leave processing on a port or a group of ports:  

Enter system view 

— 

interface interface-type 
interface-number 

Enter Ethernet port/ONU 
port/Layer 2 aggregate 
interface view or port group 
view 

port-group manual 
port-group-name 

Required 

Use either approach 

Enable fast leave processing 

mld-snooping fast-leave 
[ vlan vlan-list ] 

Required 

Disabled by default