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Cant see NT Server

By nadesdan ·
I Have an NT network with a PDC running exchange, IIS adn one member server running accpac for dos. Every evening one of the client do a large file copy to their local machine (about a gig) from the accpac server. After the copy is done, the PDC and the clients using a logon script can't see the member server either by browsing or by computer name. This seems to last for about twenty minutes and then everything seems to work. We are able to ping the member server. All machines are running Norton Antivirus CE 7.5. This was even worse when I had the Accpac server as a BDC - then it couldnt be seen unless you rebooted the BDC. Since then I've reinstalled it as a member server and its been a bit better but we still have this problem of it notbeing seen for +-Twenty minutes. Please give reasons with your answers. Thanks

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Cant see NT Server

by NTOz In reply to Cant see NT Server

Hello, your more then likely having one or more of the Following issues:

1. Your memeber server is being overloaded during this huge file transfer process and is not able to answer query's from the Domain Master Browser as to its availablity. TheDomain Master Browser is then removing it from its list of available resouces. The reason it then reapears after 20 minutes or so, is by default the Domain Master Browser updates its list of available resouces in about this period of time.

2. Ifyour network is flat, active hubs, it is possible that even if your member server does respond, its announcments or replies are getting lost in the collisions and retransmisions caused by overloading your network with this huge file transfer.

The reason you can still ping your memeber server is pinging doesnt have anything to do with Browsing. Browsing and the Network Neighborhood use a service that is a hang over from the days of Microsoft LAN manager. They are infamous for having problemswhen pushed beyond the normal daily use.

To address your issues I would do a number of things:

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Cant see NT Server

by NTOz In reply to Cant see NT Server

1. Look at my process of having a client move a Gigabyte of information every night over the network. I would look for other means of delivering this huge file. If it was still nesseary to move this huge file, I might look at how my network was segmented. I would look at using switches and upgrading to a 100hz network or at least provinding a 100hz connection between the member server and this client.

3. Monitor the member server during the transfer using Perfmon to determine if Im overloading the member server.

4. Setup a WINS server so that when users logged on, they wouldnt have to rely upon broadcasting for resouces resolution. They would first query the wins server which would respond with the proper Netbios name to IP mapping. If Wins were out of the question, and I dont know why, at least having a lmhosts file on my clients so they can resolve the netbios names without having to broadcast for this information.

I know if you follow these recomendations, you will resolve these issues. Even if change to your network is not possible, taking the advice in step four will resolve your issues of "Not Being Able to see" after the file transport takes place. This resolition might not make the member server apear in the browswer list, as thats a separate process, but users with mapped drives in a logon script will be able to process because they can resolve the Netbios names to IP addresses.

I hope this helped you out.

Pete

P.S. Dont hesitate ask more questions if I can help you.

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Cant see NT Server

by nadesdan In reply to Cant see NT Server

I am running all 10/100mb switches and have a wins server on the PDC. Also why when it was a BDC would it not come back at all. I shoul be able to copy large files without having the server disappear shouldn't I?

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Cant see NT Server

by cuzimnotcool In reply to Cant see NT Server

i need to know what type of protocol you have setup. And if your server are connected to certain type of hubs or switches, that might slow down your "connection".

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Cant see NT Server

by nadesdan In reply to Cant see NT Server

Its all TCP/IP with 3 3com SuperStack 10/100 Switches.

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Cant see NT Server

by mikeforeman In reply to Cant see NT Server

If you have a multi-homed server be sure that browsing service is turned off.
If one of the servers is multi-homed and it become the master browser everything not on the same segment as the PDC would go away.

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Cant see NT Server

by nadesdan In reply to Cant see NT Server

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Cant see NT Server

by Beeba In reply to Cant see NT Server

Rather than using a simple "copy", perhaps you should try Robust File Copy: Robocopy, located on the Resource Kit.

http://www.jsiinc.com/TIP0600/rh0609.htm for example.

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Cant see NT Server

by nadesdan In reply to Cant see NT Server

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Cant see NT Server

by Shanghai Sam In reply to Cant see NT Server

If you can ping also with name of the member server, so your Wins works well, try to put the IP of member server in a LMHOSTS file on for exapmle your PDC, during the 20 minutes when all other pcs can not see the member server, try to find it on your PDC. If it works then we can do something else for other computers.
I've assumed that your member server has a static IP.

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