D-Link DAS-3224_revB User Manual

Full Bridging Status 

This specifies the current state of full bridging on the bridge. The bridge can be 
set to residential bridging, restricted full bridging or unrestricted full bridging.   
* Residential bridging, all packets from a CPE side port are sent to Net side port 
without doing a lookup in the forwarding table.   
* Restricted bridging, there is a lookup and a packet coming from a CPE port 
destined for another CPE port is dropped. Hence, CPE-CPE switching is not 
permitted.  
* Unrestricted full bridging, all traffic is forwarded based on lookup. 

This is used to specify whether the unknown unicast packets are to be flooded 
or not. The value for this is used along with per vlan configuration for flood 
support to determine if flooding has to be done for unknown unicast packet. 

Flood Support 

This is used to specify whether the broadcasting is supported or not. The value 
for this is used along with per vlan configuration broadcast support, to 
determine if broadcasting has to be done for the broadcast packet. 

Broadcast Support 

Multicast Support 

Used to specify whether the multicast is supported or not. 

Multicast Drop 

If multicast is not supported, this setting can specify whether the multicast 
packets are to be dropped, or to be forwarded.   

Drop if Forwarding Table Full 

This specifies if the frame for which learning could not be done because of 
forwarding table limit being reached, is to be dropped. If this is enabled the 
frame for which learning could not be done because of limit exceeded shall be 
dropped, else forwarded based on bridge forwarding logic. This being enabled 
shall reduce flooding, as when a response to such a frame from which learning 
could not be done shall come the frame shall be flooded, as the entry for that 
unicast address, shall not be found in forwarding table.