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NT DNS Server loses Connection

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11 replies

by robertb

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We have a Compaq Proliant 6500 with NT 4.0 & Srv Pck 6.0a that we are using for our DNS, WINS, and DHCP Server. This system loses network connection periodically. We have changed hardware and reinstalled NT 4.0 and still have the same problem. Any ideals?

11 replies

by lordinfidel

Did you replace the NIC?

And when you say loses connectivity, can you ping out from that machine when you think it has lost connectivity.

Or is it just not answering requests?

The next time it happens, ping the machine from a another machine on the lan.

Then ping out from the machine to another machine on the lan. Also check the routing table (route print) for reoutes out. verify thru ipconfig that it has IP adress' assigned to it.

by robertb

It does not stay down long enough to do a ping test. The sniffer and Performance Monitor really does not show anything unusally.

by lordinfidel

If it is not down long enough to do a test then how do you know it's down?

If it is purley sporadic with no rhyme or reason, then I would go the cable route.

Just replace them. You can also put a tone generator on it and test the pin out.

Most of the time a recrimp of the ends solves the trick. Look at the cable end and see if the casing is crimped inside the connector. If it's not crimped (it should be crimped, that's what secures the connector in place) and only the wires go inside the connector, then I would remake that end.

by packets

Robert,
Try setting up the Sniffer to start and stop when Whats up pings your server Set up your filters to only monitor that particular server and hopefully you'll be able to see what is going on. The capture files should give you more details then. Can you tell me what kind of Nic Compaq put in the server???

by omie301

Based on the input you are giving it looks like that you didn't mention your hub/switch specifications. It looks like it craps out when the bandwidth is at peak. Try to lower the speed configuration on the nic and observe it or if you have an option that you could replace the switch with a capability to transmit and recieve 100mbps and in full duplex it would be better just to eliminate the variables.

by tbragsda

Checked the cable?

Check the HUB/Switch port?

Change the slot for the NIC?

What is happening when it looses connection? Any common condition?

by robertb

We have already changed the NIC, cables, and move to a different port on the switch. Check the port configuration.

by tbragsda

Its not software. You said you reinstalled NT etc, and it sure sounds LSL.

Whats the enviroment like? Anything to make trouble?

by ghstinshll

It's got to be a cabling problem... If you've replaced the wires to the server, how about the port on the hub it's on in the server room? Port on the switch? That would be my first line of attack. Think low-level first.. it's not the OS or services.

by robertb

We are being notified by What's Up. Usually it's down for about 2 to 3 minutes. However, by the time we receive the down page the up page is right behind. We'll look at replacing the cable again.

by robertb

We installed an Intel Intelligent Server NIC w/I960 processor. Both Server NIC and Switch Port are locked at 100/Full Duplex. APT settings are default.

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