DHCP & PXE boot workstations
DFOSTER at salliemae.com
Wed Mar 21 19:03:00 UTC 2007
We are trying to implement PXE boot for workstations to enable re-imaging of the workstation, and have run into an issue with DHCP handing multiple IP addresses to the same workstation. I have reviewed previous list entries regarding multiple IP addresses for the same mac address. One response suggests identifying the UID in the leases file, and reclassifying the 'temporary' address into a pool with shorter lease times. I tried this with one workstation, and the results are different that expected.
I started with a new workstation that had never been on the network before. They ran it through the entire PXE boot and imaging process. Checking the leases file I found 5 IP addresses for this mac address with no UID listed, and 2 IP addresses with exactly the same UID listed. I thought I understood that a subsequent request from the same UID would be given the same IP adsress. Not sure what to expect for a request with no UID.
My overall problem is the exhaustion of my DHCP pool with multiple addresses. I am running ISC DHCP Server V3.0.4
Why would I see 2 IP addresses with the same UID and mac address?
Would it be possible to classify the request differently based on the lack of a UID?
Anyone with experience dealing with the PXE boot process?
Any suggestions appreciated.
Data Communications Engineer
dfoster at salliemae.com
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