Chapter 3: Terminal Menu Operation and Structure

Configuration/Bridge

The Bridge menu is used to set up the bridge parameters for the Express L128/ L128T. The bridging function runs at the Media Access Control (MAC) level which allows any protocol packets that run over Ethernet to be forwarded.

Bridging can run concurrently with the IP and IPX routing. However, certain rules apply for when packets are bridged across a WAN connection. When IP routing is active, IP packets (which include ARP packets) are not bridged.

When IPX routing is active, IPX packets are not bridged. Also, the WAN IP Bridge and WAN IPX Bridge menus allow the WAN connection to bridge packets to the Express L128/L128T but get routed as soon as they arrive at the unit. Figure 3-6 shows the Bridge menu.

Figure 3-6

Configuration/Bridge Screen

Bridge/Mode

Write security: 2; Read security: 5

When this option is set to On (def), the Express L128/L128T bridge function will be enabled. Setting it to Off will disable all bridge functionality.

Bridge/WAN IP Bridge

When IP routing is active, the Express L128/L128T will allow another WAN device to bridge IP packets to it using PPP BCP. Normally, two IP routers

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Express L128/L128T User Manual

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ADTRAN L128T user manual Configuration/Bridge, Bridge/Mode, Bridge/WAN IP Bridge