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Problem with NetBIOS Protocol

By sgandenberger ·
I have been having a problem with users loosing the connection for their mapped network drives. The drives are mapped by a "NET USE" command run as part of a log in script. They are not dropping from the network because they still can e mail (EXCHANGE via RPC), access the UNIX server via the terminal emulation program using TCP/IP, and they can ping the file server. They just can't access the network drives through Explorer or Network Neighborhood. This evidence makes me believe the problem is in the Net BIOS protocol since what is failing is dependent on Net BIOS Name Resolution. We are not currently running WINS nor are there LMHOSTS files set up on the PDC (NT4.0 SP6) or the BDC (NT4.0 SP6). The problem seems to be isolated to just certain users. Does anyone one have an idea of what the problem might be? If implementing WINS or using LMHOSTS files seem to be the answer, can you recommend a good guide for implementing the solution?

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Problem with NetBIOS Protocol

by Dennis@l In reply to Problem with NetBIOS Prot ...

I had this problem too a while back, even when I used an Lmhosts file on my clients. I later activated a Wins server closer to my clients and havn't had a problem since.

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Problem with NetBIOS Protocol

by sgandenberger In reply to Problem with NetBIOS Prot ...
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Problem with NetBIOS Protocol

by guy In reply to Problem with NetBIOS Prot ...

I think that WINS would solve your problem.
Install on the server, then configure the TCP/IP tab for the WINS server.
Better Still use DHCP and give each client the WINS server automatically add a type 44 and type 46 (0x8).
If you do not like either of these then there is the trusty LMHOSTS files.
I have been wondering how the users log on if there is no NetBIOS to get the Domain controllers names? Perhaps they logon to Novell or Unix or even locally?

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Problem with NetBIOS Protocol

by sgandenberger In reply to Problem with NetBIOS Prot ...
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Problem with NetBIOS Protocol

by calves In reply to Problem with NetBIOS Prot ...

WINS is the easiest solution in the long run. Also, you want to look into possible Browser problems. Look for a Tools called Browstat.exe in your NT Utilities CD.
That will help you indentify who is your Master Browser. From there, you should (using the documentation from Technet, change the registry for NT and change the NIC configuration on 95/98 machines to disable unwanted computers to become master browsers.

That all I have for you!

Good Luck!

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Problem with NetBIOS Protocol

by sgandenberger In reply to Problem with NetBIOS Prot ...
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Problem with NetBIOS Protocol

by mcessna In reply to Problem with NetBIOS Prot ...

Try using an LMHOSTS file pointing to your domain controller. I have had similar problems with win9x clients, especially over a wan link or slow network link (building to building wireless). Here's an example of the lhhosts file
xxx.xxx.xxx.xxx%PDC/BDCservername% #PRE #DOM:%domainname%
Just drop the file into the c:\windows directory on win9x. I haven't had this problem with me NT workstations but if you do drop the lmhosts file into c:\winnt\system32\drivers\etc

Hope this helps.

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Problem with NetBIOS Protocol

by sgandenberger In reply to Problem with NetBIOS Prot ...
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Problem with NetBIOS Protocol

by msullivan In reply to Problem with NetBIOS Prot ...

Most of the previous posts seem to be on track. It sounds like a browse master issue. As the browse master (likely a client) re-boots, computers lose resolution.

You can use any of 3 methods to resolve the problem. WINS, LMHOST, or setting yournetbios node type to 'B'roadcast (if everyone is on the same network).

There are plenty of great articles at msdn.microsoft.com on WINS and LMHOST usage.

Hope this helps
Mike

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Problem with NetBIOS Protocol

by sgandenberger In reply to Problem with NetBIOS Prot ...
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