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USER’S GUIDE
388 CyberSWITCH
X.25 CONNECTIONS
Problem:
An X.25 access is configured, but the
x.25 stats
command response is:
No X.25 Access configured
Action:
Verify that the proper line and port have been selected.
1. Enter the
er
command to erase the report log.
2. Enter the
trace lapb on
command.
3. Wait 20 seconds, then enter the
dr
command to display the report log. The status log should
display a sequence of the following messages:
(I) 17:33:35.38 #1067: Out - LAPB RR, Rx Sequence = 1
(I) 17:33:35.38 #0000: 01 31 00 2A
(I) 17:33:35.38 #1067: IN - LAPB RR, Rx Sequence = 1
(I) 17:33:35.38 #0000: 01 31 A2 00
4. If these messages are not displayed, verify with the service provider that the line and bearer are
provisioned for X.25 packet access, and the LAPB addressing format, modulo 8 or 128, is
consistent with the line provisioning.
5. If the log contains a sequence similar to the following:
(I) 17:33:32.32 #1067: IN - LAPB SABM
(I) 17:33:42.32 #1067: IN - LAPB SABM
(I) 17:33:52.32 #1067: IN - LAPB SABM
verify with the service provider verify that the line and bearer are provisioned for X.25 packet
access, and the LAPB addressing format, modulo 8 or 16, is consistent with the line
provisioning.
6. If the log contains a sequence similar to the following:
(I) 17:33:32.32 #1067: IN - LAPB SABM
(I) 17:33:32.32 #0000: 03 3F A6 04
(I) 17:33:32.32 #1C05: x25 access 1 in state ACCESS UP for
event LAPB UP
(E) 17:33:32.32 #1C04: Invalid event for access 1
(I) 17:33:32.32 #1C05: x25 access 1 in state ACCESS UP for
event X25 DOWN
(I) 17:33:32.32 #1067: Out - LAPB UA
(I) 17:33:32.32 #0000: 03 73 00 10
verify that the LAPB timer values are consistent with the service provider specifications.