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BAD_ADDRESS listing under Active Leases

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8 replies

by featsfanbob

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We recently installed DHCP on our NT 4.0 network and is running successfully. When I pull up active leases under the DHCP manager, however, I see a number of addresses which are listed as BAD_ADDRESS. These are not addresses we excluded from the scope and they are not reserved or broadcast addresses. What does this entry mean?

8 replies

by Former member

Either someone is using static addresses that are duplicates to the one listed as BAD_ADDRESS's or turn off DHCP logging, since there is a bug.

by calves

I noticed those address while back, but after chasing the the IP and owner, I found to be the other servers, using those IP for various connections into the server where the DHCP resides. So, a left it alone.
I hope that points you in the right direction.

Good Luck!

by wirejockey

Run "WINIPCFG" (on Win9x PC's, IPConfig on NT) and click on "Release All" then click on "Renew All". You may find that some PCs may not release the address, in my experience, waiting until the lease expired cleared the problem. You may not want to wait that long. Warning: do not delete your current scope and create a new one UNLESS you first release all IP addresses on your network. Good Luck!

by jun1cez1

To featsfanbob,

I may have to refresh you in TCP/IP addressing then. In tcp/ip, if the last octet of the node address falls into all zero's and all one's, its a bad address. I mean, let say,

network.network.network.00000000 or
network.network.network.11111111

are consider bad address and not being recognized at all. So, I suggest that you revisit your addressing scheme.

Good luck.

Jun

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