Diagnostic Messages

Diagnostic Message Example

Diagnostic Message Example

An example diagnostic message generated by the network from a CLEAR REQUEST packet is shown below:

Clear request

 

LCGN: 0

LCN : 32

Clearing Cause [0] : DTE originated.

Diagnostic [241] :

In the example above, LCGN is the Logical Channel Group Number and LCN is the Logical Channel Number (the number denoting the logical association between a DTE and DTE connected by a VC). Refer to the discussion below for more information on cause codes.

Diagnostic codes are generated by the network and may appear in octet 5 of RESTART INDICATION, RESET INDICATION, or CLEAR INDICATION packets. If a diagnostic field is not present in a CLEAR INDICATION or RESET INDICATION packet, 0 is returned as the diagnostic code.

A cause code and message is usually returned from the network with each diagnostic. Diagnostic codes and messages are usually displayed only when tracing or logging is on, the x25check utility is run, or cause and diagnostic codes are printed in level 3 application programs. Refer to the listing of diagnostic codes later in this appendix for more information.

In the descriptions in the diagnostic listing, a REQUEST or ACCEPTED packet refers to a packet generated by the local application and an INDICATION or CONFIRM packet refers to a packet received from the network. The requests in which a diagnostic code can be found are shown after the numeric code of the diagnostic.

Once the application specifies CLEAR or RESET cause and diagnostic codes, this code combination is used for all RESET REQUEST packets generated by the application. This combination is also used for the CLEAR REQUEST generated when the application calls close() or shutdown() on a given socket.

Appendix C

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HP CommonIO Products manual Diagnostic Message Example

CommonIO Products specifications

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