Line, adapter, or modem outages result in error messages at both the SNA console and the DirectConnect server. DirectConnect for z/OS Option records the message and, if possible, sends a similar error message to any affected clients.
Intermittent hardware errors and line degradation problems can disrupt processing but can be difficult to find. You should check periodically for these types of problems., for example:
To check for hardware errors, use the associated SNA error logs and report errors to IBM Service.
To check for line degradation, use SNA to periodically report the SDLC line statistics. Examine the statistics for a significant number of re-transmissions or idle detect time-outs. Line degradation results in random SDLC line failures or very slow response to the client, even during a moderate processing load.
