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To perform MAC-layer bridging, the switch must know the destination MAC-layer address of each device on each attached network so it can forward packets to the appropriate destination. MAC-layer addresses are then stored in the bridging table, and you can filter packet traffic based on the destination MAC-layer address information.
The MAC filtering supported in the Passport routing switches is the Bridge MIB filtering (RFC 1493). The number of MAC filters is limited to 100. You create a filter entry in much the same way as you create a static MAC entry, by entering a MAC address and the port on which it resides. In the MAC filter record, you also specify which ports are NOT ALLOWED to send traffic to that MAC on that port.
For example, if the filtered MAC address sends out an ARP request for a station on one of the NOT ALLOWED ports, the station will receive the ARP request and send a reply. In this instance, the reply gets filtered by the switch, not the request from the filtered MAC.
To filter layer 2 traffic:
MacAddress
Enter the MAC address to be filtered.
Port
Select the ports from which you do not want to receive packet traffic for this MAC address. You can either type in the port address or select the port from the port list after clicking the Ellipsis button at the end of the Port text box.
NotAllowedFrom
Select the ports from which you will not allow traffic. You can either type in the port address or select the port from the port list after clicking the Ellipsis button at the end of the NotAllowedFrom text box.
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