3com S7906E Manuel De Montage

 

4-5 

With the fast-leave processing feature enabled, when the ONU receives an IGMP leave message from 
a host announcing its leaving a multicast group, the ONU immediately deletes that port from the 
outgoing port list of the forwarding table. After that, when receiving IGMP group-specific queries for that 
multicast group, the ONU will not forward them to that port.  

If only one host is attached to a port on the ONU, fast-leave processing helps improve bandwidth and 
resource usage.  

Follow these steps to configure fast-leave processing for a UNI: 

Enter system view 

 

— 

Enter ONU port view 

 onu 

 

— 

Enable fast-leave processing 
on a UNI 

uni uni-number

 

 

Required 
By default, fast-leave 
processing is disabled on a 
UNI. 

 

 

Before performing this configuration, make sure the ONU works in IGMP Snooping mode. For 
related configurations, refer to 

.  

 

The fast-leave processing feature is effective for IGMPv2 or IGMPv3 clients only.  

 

If fast leave processing is enabled for 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 listening to the same 
multicast group will fail to receive multicast data. 

 

This task adds UNIs to an isolation group to achieve Layer-2 data isolation (that is, UNIs in an isolation 
group cannot forward packets to each other). This improves network security and allows for flexible 
networking schemes. 

Follow these steps to configure port isolation for a UNI: 

Enter system view 

 

— 

Enter ONU port view 

 onu interface-number 

— 

Configure port 
isolation for all UNIs 

 

Configure 
UNI port 
isolation 

Configure port 
isolation for the 
specified UNI 

 uni-number port-isolate 

Required 
Use either command 
By default, a UNI port is 
not in any isolation 
group.