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Server assigned IP problems.

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7 replies

by jneilson

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Here at work we occasionally have a problem where users (both my bosses laptops in perticular)can't get on the network. I'll get on their computers and assign an IP, like 10.0.0.100 or some such and that will work for awhile. Then they'll go out town, come back and it starts over again. The server is a Win2003 SBS machine. I can't find a root cause for this and the pres of the company wants something more than a bandaid fix, like I use now. Thanks.

7 replies

by w2ktechman

manually punching in an address in a dhcp environment can be a bad idea. If the address is being handed out from the DHCP server you can have an IP conflict. Also, it will not reassign addresses properly.
Another issue can be if it is set for DHCP and has an additional setting for another network, with an assigned address that is in the same scope as the work addresses.
So basically, set it to DHCP and set DNS to DHCP and reboot (or ipconfig /renew). Does this work? If not, please explain in more detail about server assigned when you are setting it manually.

by jneilson

sometimes when a computer gets hooked backup to the network it doesn't get assigned an IP even though it's configured to. I'll go in and put in an IP and can get connected.

by w2ktechman

but you can always setup a logon script for them to run
ipconfig /release
ipconfig /renew

to make sure that when they log in it will look to assign an IP address.

It may be something has interrupted the startup environment and it is not finding the DHCP server correctly. In this case it would probably assign an autoconfig address.

by hal 9000

Connected up to numerous different LAN's so that these people can get access to their stuff?

It's the only time that I've seen things like this happen except of course if the SBS package has exceeded it's upper limit of concurrent connections. If that is the case the fix would be to move to a different server package that allows more concurrent connections.

If it's only happening after these NB's have been out of the office and logged onto different network/s then a simple IP release/Renew Script should do the job quite nicely.

Col

by jinteik

whats your scope that you set to ur dhcp?is it enough?usually once it is assign this should never ever happen unless soemthing is messing up something...how about settings of the dhcp? network cables ok?

by jneilson

I'll try ipconfig /release and renew if/when it happens again. We've already to increase the servers concurrent connections, it was limited to 50. Right now we use an IT company to handle most of the server issuses, but my boss is frustrated with their response times.

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