DHCP renew less

[ssphoenix]

Recently a few pcs have had their IP less expired. I haven't figured it out how to renew the IP other then taking the pc out of the domain and placing it back. I can imagin having to do this for all pcs when their IP expire and I am sure must be a way to renew it throught DHCP server.

Help would be grealy appreciated. Thanks

 

[Guntha]

Have you tried going to a command prompt and typing the following?

ipconfig /renew
You didnt mention you had so I thought I'd throw this out.......

Alex

 

[Zelandakh]

if its 9x machines its winipcfg then renew.

 

[OzDog]

The more pressing issue here, is why have the IPs not renewed automatically. You haven't changed anything? Re-created the scopes?

If not, I will assume that you are using NT4.0 as a DHCP server (being an NT4 forum). The clients (that is - all versions of MS Windows & NT) should be automatically attempting to renew their IP at 50% of the lease, then 75%, 87.5%... and so on. That is, if you set the lease up to last 3 days, the machine will try to renew the same address after 36 hours. If it can't it will try again after another 6 hours days... etc

Taking a PC out of a domain has nothing to do with IP settings, and will only affect it if you are actually removing TCP/IP or your NIC from your network settings on the client.

I would suggest checking your event logs on the DHCP server - check for any problems, and also re-apply the latest NT Service Packs. If that doesn't help, post your DHCP Server and scope settings, and we'll have a bit of a look.

DHCP just SHOULD NOT work the way you are talking about, and may need to be re-installed. Cheers,
Sam

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[ssphoenix]

Sam,

Thanks for your reply. I am familiar with DHCP and it's scope. However, time was critical to get the pc running. My thought process was: First thing I checked was the event viewer and it showed that the PC in questions was trying to renew IP but failed. The pc is XP. The I did the ipconfig /all and ipconfig /renew but I got back information that the ip has expired 5 hours ago and when renew command was executied, nothing happened. Still showed the same IP address received from DHCP and still showed time of expiration 5 hours. Time was critical to get this thing running. By removing the pc from the domain acctually helped. However, I didn't mentioned that I have removed the PC from the DHCP server and WINS.

Strangely during this problem, the pc was working fine which makes perfect sense since it had an IP address. I was browsing my network, the internet, printing, except one of my application was not responding correctly to ODBC requests from my SQL.


Thanks

(There is a way to renew IP lesses manually. I've done it in the past once but can't seem to work now as the property of the PC IP less in DHCP is grayed out).

 

[OzDog]

If the IP has expired, you need to release, then renew...

>ipconfig /release
>ipconfig /renew

Has the original problem corrected itself? Are there other machines losing IP Leases? Are they all XP? Cheers,
Sam

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