3com S7906E 설치 설명서

 

1-20 

interface interface-type 
interface-number 

Enter Ethernet port/OLT port 
view or port group view 

port-group manual 
port-group-name 

Required 

Use either approach 

Enable multicast source port 
filtering  

igmp-snooping source-deny 

Required 

Disabled by default  

 

Unknown multicast data refers to multicast data for which no entries exist in the IGMP Snooping 

forwarding table. When receiving such multicast traffic, the switch floods it in the VLAN, incurring 

network bandwidth waste and low forwarding efficiency. 

Follow these steps to configure globally the function of dropping multicast packets:  

Enter system view 

system-view 

— 

Enter IGMP snooping view 

— 

Enable the function of dropping 
multicast packets  

drop-unknown 

Required 

Disabled by default 

 

Follow these steps to configure the function of dropping unknown multicast data packets in a VLAN:  

Enter system view 

system-view 

— 

Enter VLAN view 

vlan vlan-id 

— 

Enable the function of dropping 
unknown multicast data 
packets 

igmp-snooping 
drop-unknown 

Required 

Disabled by default