10.3 Running DLPI Over LAPB

You cannot use LAPB on a link that is already in use with X.25, so you need to build the stream architecture before you can run DLPI over the LAPB protocol.

The stream architecture for LAPB must be:

The serial driver manages the chip that controls the serial line. The wanmod module is installed between the serial driver and the LAPB driver. The wanmod driver controls the signals sent by the serial driver and informs the LAPB driver when the connection has been established at the physical level (i.e. when the cable is plugged in). The LAPB driver then implements the LAPB protocol and the DLPI interface.

See "11.1.2 Message Primitive Sequence Summary", for additional information.