Инструкции По Установке для 3com S7906E

 

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

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

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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 IGMP leave messages in a fast way. 

With the fast leave processing feature enabled, when receiving an IGMP leave message on a port, the 

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

indicated group. Then, when receiving IGMP group-specific queries for that 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 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 

system-view 

— 

Enter IGMP snooping view 

igmp-snooping 

— 

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 

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

Required 

Disabled by default