3Com S330 Enter 2 to enable the destination address filter, Viewing the List Forwarding Table

Configuring the Ethernet Interface 119

7Select [3] Set Destination Address Filter. The following prompt appears at the bottom of the screen:

Enter Destination Address Filter (1=Disable, 2=Enable)

8Enter 2 to enable the destination address filter.

Viewing the List Forwarding Table

The List Forwarding Table is a current forwarding table for the bridge. To display this table, select [5] Forwarding Table from the Bridge menu. Figure 91 shows a representative List Forwarding Table.

Figure 91 List Forwarding Table

The List Forwarding Table identifies the port on which a certain MAC address is located. This can be an Ethernet port or an ATM VC. Using the information in the List Forwarding table, the bridge knows where to send a MAC address when it receives one. If the Ethernet port receives a packet, and the destination MAC address is not in the List Forwarding table, the port broadcasts the packet—sends it to all Vxs associated with that port.

The List Forwarding Table includes the following columns of information:

MAC Address—The destination MAC address.

Disp.—Disposition:

Bridge—The default disposition.

Flood—Flood the frame on all available VCs.

Filter—Drop this frame.

L_Static—Destination MAC address is in Bridge Static Table.

SRC_Address_Filtering—User-configured source address filter.

DEST_Address_Filtering—User-configured destination address filter.

Location— The port (slot and port number) on which the destination MAC address is located.