Solved

Old IP address of AD DHCP server keeps returning when I open the DHCP MMC....

Posted on 2004-03-31
12
429 Views
Last Modified: 2010-04-13
Can someone please tell me where this value resides in AD?  I've unauthorized and re-authorized my DHCP server just like the MS Q-note suggests and the server continues to pop up with the old IP address when I use the "Manage authorized servers".  (btw, it shows two entries for the server; one correct and one old).  It happens even when I am on a machine where I have never used the DHCP MMC, so it's not a locally saved value.

I've tried searching the AD database using ADSI, but no luck so far.  More of an annoyance than anything else.
0
Comment
Question by:ccallison
  • 6
  • 3
12 Comments
 
LVL 57

Expert Comment

by:Pete Long
Comment Utility
whats in your DNS forward lookup zone?
0
 
LVL 57

Expert Comment

by:Pete Long
Comment Utility
i.e. is there an entry for the WRONG IP address?
0
 
LVL 57

Expert Comment

by:Pete Long
Comment Utility
also make sure this reg key (on the DHCP server) has a value of 1
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DisableDynamicUpdate

0
 
LVL 57

Expert Comment

by:Pete Long
Comment Utility
oops wrong! should have a value of 0
0
Complete Microsoft Windows PC® & Mac Backup

Backup and recovery solutions to protect all your PCs & Mac– on-premises or in remote locations. Acronis backs up entire PC or Mac with patented reliable disk imaging technology and you will be able to restore workstations to a new, dissimilar hardware in minutes.

 
LVL 2

Author Comment

by:ccallison
Comment Utility
I think you're way off, Pete.  The DHCP server is the DC and it is correctly registering itself in DNS, both forward and reverse.  There are two entries listed,  both with the name of the DHCP server - one is the correct new address and one is the incorrect old address.  It is being queried by the DHCP MMC tool from somewhere in AD, not DNS.
0
 
LVL 57

Accepted Solution

by:
Pete Long earned 50 total points
Comment Utility
AD is 99.9% dependant on DNS, either set up scavenging on your forward lookup zone or manually delete the old entry.
0
 
LVL 2

Author Comment

by:ccallison
Comment Utility
Scavenging is already turned on for all forward and reverse zones and there IS no old entry.  DNS is correct.  I have run both DCDiag and Netdiag and found no errors.  AD is highly dependent on DNS as a locator service for many functions( finding PDC, GS, site subnet assignments, etc.), but the admin tools often query the AD database through LDAP directly.
0
 
LVL 2

Author Comment

by:ccallison
Comment Utility
Okay, I found a way to remove the old entry, but it still doesn't satisfy my curiosity as to where this value was being held.

In the DHCP MMC, if you have the correct address open and under management, then reselect "Manage Authorized Servers" and then highlight the offending entry with the legacy address and select unauthorize.  It doesn't seem to affect the running service on the new address.
0
 
LVL 57

Expert Comment

by:Pete Long
Comment Utility
comment from pete 04/01/04 0436 hrs GMT: or manually delete the old entry
reply >>there IS no old entry
2nd reply >>Okay, I found a way to remove the old entry

Bizaare
0

Featured Post

What Is Threat Intelligence?

Threat intelligence is often discussed, but rarely understood. Starting with a precise definition, along with clear business goals, is essential.

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
auto copy 8 610
Images sometimes not printed 6 467
Windows Foriegn Disk 3 128
Cannot Upgrade Microsoft Installer on Windows 2000 29 57
NTFS file system has been developed by Microsoft that is widely used by Windows NT operating system and its advanced versions. It is the mostly used over FAT file system as it provides superior features like reliability, security, storage, efficienc…
This article explains how to prepare an HTML email signature template file containing dynamic placeholders for users' Azure AD data. Furthermore, it explains how to use this file to remotely set up a department-wide email signature policy in Office …
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, Just open a new email message.  In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now