NBT Manual

NBT Usage
NBT Manual—424773-001
4-3
Troubleshooting
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NCB^POOL^KEY is not used.
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For NCB^LSN, NCB^LSN^EXT, NCB^NUM, and NCB^NUM^EXT, values are
assigned differently from MULTILAN. To be compatible with standard NetBIOS
rules, NBT will never assign the values 0 or 255 to the NCB^LSN field. Other than
skipping these values, the NCB^LSN^EXT is used as the high-order byte of the
NCB^LSN field and the sessions are assigned the lowest available LSN. Likewise,
NCB^NUM^EXT is used as a high-order byte to NCB^NUM, and the lowest
available name index is used.
Troubleshooting
If a problem occurs that requires assistance from Compaq support personnel, an NBT
trace file is usually required. Here are some guidelines for tracing NBT:
•
Try to isolate the problem as much as possible. If possible, limit all NBT activity to
a single window, session, etc.
•
If possible, start the trace immediately before reproducing the problem, and stop the
trace immediately afterwards.
•
Normally, give the binary trace file to Compaq support personnel. It can be
formatted locally with the NBTGTRED program.
•
Traces from PAM on a G-series system or TLAM on a D-series system, and TCP/IP
are generally much less useful. Use these traces only when specifically requested by
Compaq support personnel.
•
LAN hardware traces are sometimes useful, but they frequently contain a lot of
unrelated network traffic, and they do not contain the detailed information in an
NBT trace.
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Check the TCP/IP subnet configuration, and be sure that the TCP/IP subnet name is
used in the ADD DOMAIN command.
•
For Type P and M, verify that the NetBIOS Name Server is properly installed and
operational at the IP address specified in the ADD DOMAIN command. Also check
that workstations are configured for Type P and specify the IP address of the
NetBIOS Name Server.
•
The NetBIOS scope (SCOPE field of the ADD DOMAIN command) must match
the remote workstation scope. If the scope is disabled in NBT, it must also be
disabled on all remote nodes. If the scope is configured in NBT, it must match the
setting in all remote nodes. Use STATUS DOMAIN to display the number of
messages received by NBT with mismatching NetBIOS scopes, as well as the
scope-id of the first such message.
•
For PCT and TTE, verify that the configuration specifies MULTILAN for D-series
systems, and the proper host name and window names are used.