Network controller line trace (3710 only)

The network controller line trace facility traces SDLC, BSC, and start/stop data link control frames sent or received by an IBM® 3710 Network Controller.

The 3710 physical unit provides a network controller line trace on a physical unit type 2 node. The network controller line trace facility traces data link control (DLC) protocols, such as DLC frames exchanged between a network controller and an NCP, or DLC frames exchanged between a network controller and a control unit.

The network controller line trace facility also traces the synchronous data link control (SDLC), binary synchronous control (BSC), and start/stop DLC frames that are sent or received by a line adapter.

When tracing an SDLC or BSC line, you can choose to trace all the frames (control and data) or just the data frames. All frames are traced on a start/stop line.