OSI/AS Configuration and Management Manual

Troubleshooting Guide
OSI/AS Configuration and Management Manual—424119-001
8-51
NSP Process: X25AM
The following PTrace command records all the trace records selected:
record all
The following are the two trace records of interest:
Records #68 and #82 show that the CR-TPDU was accepted and that a CC-TPDU was
sent in response.
NSP Process: X25AM
X25AM acts as the service provider for the TSP process, and supplies the Data Link
Layer and Physical Layer as well.
Common problems to look for are the following:
•
Clear packets in response to call requests
•
Intermittent REJECT or RNR packets returned
•
Frequent RESTART or RESET packets
SCF Commands
The STATS LINE command displays counters for all the different types of packets sent
and received on an X25AM line. For example, the following command is issued on a
line named $X251:
STATS LINE $X251
Check for unusually high numbers of RNR, REJ, RESET and RESTART packets. The
number of call packets sent and the number of call confirm packets received should be
roughly equal. Check the screen for invalid packets that were received or discarded. If a
6100-family controller is configured, the returned screen displays the number and types
of Layer 2 frames sent and received, as well as errors due to frame overruns, FCS errors,
receiver aborts, and the like.
The following command displays configuration information that applies to the current
X.25 subdevices and to the entire line, such as packet size, window size, and the source
address for the line:
INFO LINE $X251, SUB ALL, DETAIL
10/16/91 16:07:20.380437 >000.000000 #68 L4 TPDU IN
CR-TPDU CDT: 4 Dst: 0 Src: 2 Class: 2 Ext-Frmt: NO Exp-Flwctl: YES
Calling TSAP:(hex) 4444 4444 01 Called TSAP:(hex) 4444 4444 02 TPDU
Size:512
Version: 1 Protection:(hex) 7061 7373 776F 7264 password
Option:N-Expedited(NO) Option:Receive Conf(NO)
Option:No Checksum(NO) Option:T-Expedited(YES)
10/16/91 16:07:20.898392 >000.517955 #82 L4 TPDU OUT
CC-TPDU CDT: 4 Dst: 1 Src: 2 Class: 2 Ext-Frmt: NO Exp-Flwctl: YES
TPDU Size:512 Protection:(hex) 6173 7377 6F72 6400 password
Option:N-Expedited(NO) Option:Receive Conf(NO)
Option:No Checksum(NO) Option:T-Expedited(YES)