SWAN Concentrator and WAN Subsystem Troubleshooting Guide

Troubleshooting the SWAN Concentrator and WAN
Subsystem
SWAN Concentrator and WAN Subsystem Troubleshooting Guide—426992-008
1-7
SWAN Download Error Alarm
•
Incorrect Logical Configuration Alarm
SWAN Download Error Alarm
This alarm is generated when a problem occurs during the downloading of a data link
control (DLC) task to a communications line interface processor (CLIP) on the SWAN
concentrators.
Possible causes of this alarm include:
•
A problem in the DLC task object code file (specified by the PROGRAM attribute).
•
A problem in the ConMgr process, the WAN manager process, or the TFTP server
process. These processes work together to download a DLC task to a CLIP.
•
A problem in the software or hardware connection between the SWAN
concentrators and the NonStop S-series server.
•
There are two types of DLCs: one for SWAN (xxxxxPxx) and one for SWAN 2
(xxxxxQxx). If the wrong DLC is downloaded, a download error will occur when an
attempt is made to start the line.
To recover from this alarm:
1. Make sure that the DLC task object code files are secured with "N" read access.
The DLC task object code files should be located in the $SYSTEM.CSSnn
subvolume.
2. Make sure that the TFTP server process is configured to use the correct location
for the DLC task object code files. (The TFTP server process is automatically
configured by the WAN manager process.) The location of download is specified
by the STARTUP attribute. (The default location is $SYSTEM.CSSnn subvolume.)
3. Check the status of the required WAN subsystem processes and objects and their
supporting processes, then restart any processes and objects that are not in the
STARTED state.
4. Check the cable connections between the E4SAs, FESAs, GESAs, or G4SAs and
the SWAN concentrator, and correct any cabling problems.
5. Check the LAN hardware, then correct any LAN hardware problems.
Network Error Alarm
This alarm is generated when the software or hardware connection between the
NonStop S-series server and the SWAN concentrator is not operational.
To recover from this alarm, perform Steps 2 through 5 as described for SWAN
Download Error Alarm on page 1-7.