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NCT480 IP DSLAM User Guide YML856 Rev3
44 www.netcomm.com.au
Item Description
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.
Status of 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 (Uplink
ports) 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 bridging, all traffic is forwarded based on lookup.
Table 2-4 Bridge Configuration Dialog Description