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Network Connection Problem

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11 replies

by bbowling

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I am having a problems with PCs looses network connection to some servers. Mainly my Remedy Server and Exchange server. You can see the servers in Network Neighborhood. The error is server not found. We use DHCP to assign IP addresses (12 day lease). I have tried different lease periods with no help. If I run ipconfig/release and ipconfig/renew the connection is good again. I do not have the problem with the static machines. I have installed another DHCP server with no help. I have made changes to the options in DHCP with no help. My network uses Win2000 Domain Controllers only. The systems having the problems are mainly Win 2000 but I have seen some NT 4.0 system have the same problem. I also have a WINS server on the Network.

11 replies

by ipjunkie

I agree with the above post, assign your Servers fixed IPs. It seems like this problem could be caused by incorrect DNS or WINS configuration.

by Former member

Maybe you have some overlapping IP addresses somewhere, someone else using the same address? Try checking your IP address, shut it down and try to ping it from another PC...

Could be a routing problem as well. Is there a router between the servers/PCs? What about your address scheme? Any problems with subnetting and masks? Use pings and traceroutes to find the problem...

by bbowling

I use DHCP on all systems except the servers. All the above items I have tried with no help. I can ping the server and tracert finds it OK.

Bill

by frobo

Hi,

have you any NT 4.0 Server in your Network?
If so their is the following Problem :
If you have an NT 4.0 Server with DHCP on it, and no active Range , it will still respond on client lease requests:
?There is no lease free?
This problem occurs every time the client boot?s, or half of the leasetime has been spend. This is an problem with Sp4,sp5 sp6, sp6a for NT 4.0.

Frobo

by bbowling

I have a Win2000 Network. I do have 2 NT 4.0 servers but no one has problem reaching them. The NT40 servers are not running DHCP. They both have static addresses. The two main servers having problems are Win2000 Servers (one is Exchange Server and the other is Remedy/SQL Server). I can ping and tracert them both when the connection is lost. I can ping the IP or Name.

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