Filter tab

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 receives the ARP request and sends a reply. In this instance, the reply gets filtered by the switch, not the request from the filtered MAC.

To view a list of filters:

1. From the Device Manager menu bar, choose VLAN > VLANs.

The VLAN dialog box opens with the Basic tab displayed.

2. From the table, select a VLAN.
3. Click the Bridge button.

The Bridge, VLAN dialog box opens with the Transparent tab displayed

4. Click the Filter tab.

The Filter tab opens.

• Filter tab and Bridge, VLAN Insert Filter dialog box items