DHCP Server Hell

March 2, 2009 at 22:36:20
Specs: Windows 2000 Server
The DHCP Server has about 170 active leases. About 20 of the leases have strange mac addresses.

For Example:
Client IP Address Name Unique ID Lease Expiration Type Description 3139322e3136382e3130302e393700 3/10/2009 3:02:50 PM DHCP 3139322e3136382e3130302e393600 3/10/2009 3:02:50 PM DHCP 3139322e3136382e3130302e373400 3/10/2009 3:02:50 PM DHCP 3139322e3136382e3130302e32323200 3/10/2009 3:02:50 PM DHCP 3139322e3136382e3130302e31393800 3/10/2009 3:02:50 PM DHCP 3139322e3136382e3130302e31383300 3/10/2009 3:02:50 PM DHCP

I've determined one of these entries to be an apple airport, configured as a bridge. Is it possible that it is giving some sort of combination of some of the mac addresses that it is bridging through to the dhcp server?

Any help is greatly appreciated.


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March 2, 2009 at 23:30:38
If the AP is briding, then the client mac should be the real mac of the node & your DHCP server should see it as such. (As long as

I dunno about the extra IP's - I was confused by something like this, turned out a bunch of people had just gotten iPhones & they were the strange DHCP entries I kept seeing.

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March 3, 2009 at 13:00:12
Interesting that you mention iPhones. I have had some activity in the dhcp log from iPhones. But they all had normal looking mac addresses. What do your iPhone mac addresses look like?

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March 3, 2009 at 15:37:06
I have no idea what those are but they are not mac address. Too many characters. There are a lot of repeated characters. Perhaps its a mac with an addon mac. So you would have the mac of the unit added to the mac of the AP.

But I have never seen that in any equipment I have used.

A one sentence question will result in a one sentence answer.

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