OSI/AS Configuration and Management Manual

Troubleshooting Guide
OSI/AS Configuration and Management Manual—424119-001
8-53
Troubleshooting Example
The following command limits the display to a specific logical channel number (an X.25
circuit):
FILTER LCN circuit-number
You can use the SELECT L2 mask to determine the LAPB information frames
transmitted to and from the Data Link Layer. The following commands omit all the RR
frames, thus reducing the display traffic:
SELECT L2
FILTER NOTRR
The following shows a trace of a typical incoming call request in a Layer 2 information
frame:
Troubleshooting Example
The following is an NSP (X25AM) problem that you may encounter. The steps in this
example illustrate the logic you might follow when using a top-down problem-solving
approach.
Symptoms
An application cannot establish a connection with remote application REMOTEX. All
attempts to initiate a session connection end quickly with errors.
The following steps are used to solve this problem:
•
Step 1: Reset the Statistics Counters and Rerun the Application on this page
•
Step 2: Analyze the Application Using Inspect on this page
•
Step 3: Review the Statistics Using SCF on this page
•
Step 4: Collect Trace Information Using SCF on page 8-59
•
Step 5: Analyze the Trace Using PTrace on page 8-60
•
Step 6: Analyze the Problem Further Using SCF on page 8-61
•
Step 7: Correct the Problem on page 8-62
Step 1: Reset the Statistics Counters and Rerun the Application
Reset all the statistics counters. A discussion on how to set up a command file to reset
all your statistics counters is included at the end of this section.
Rerun the application. This ensures that the statistics screens are as free from irrelevant
information as possible, and makes it easier to identify information pertaining to the
particular problem you are trying to diagnose.
02:48:44:600 >000.000 #39 LAPB In
A/C($012E) DCE IFRAME P=0 N(S)=7 N(R)=1
000: 012E 10FE 0BCC 4083 3311 1101 4083 3322
008: 2201 0343 0202 0000 0000