SNA Link/iX Node Managers Guide (30291-90507)

Chapter 1 17

SNA Links Overview

Tracing Provided

Three levels of tracing for the SNA links are provided: node tracing,

intrinsic tracing, and link-level tracing. Node tracing for SNA

Transport is on a node basis and normally is turned off. When turned

on, it traces SNA Transport internal events; so, it is a useful tool for

troubleshooting SNA Transport. Intrinsic tracing is on a session

basis and normally is turned off. When turned on, it traces the

send/receive interface between SNA Transport and the SNA services.

Because it includes the SNA headers as well as the data, SNA

Transport intrinsic tracing is a useful tool for troubleshooting the SNA

services. Both types of SNA Transport tracing are turned on and off by

using MPE commands. The SDLC link driver also has a trace facility

that is useful for troubleshooting SDLC link-level problems; since it

drains resources, it normally is turned off. Link-level tracing is

turned on and off by using MPE commands. Tracing is described in

Chapter 5 , “SNA Link Troubleshooting,” of this manual; the commands

are described in Chapter 6 , “MPE Commands.”