Solved

nslookup shows a host from a decommissioned DHCP scope

Posted on 2015-02-04
2
120 Views
Last Modified: 2015-02-09
Months ago I applied a new subnet mask to my network, allowing more hosts.  I took the IP addresses in question from the dynamic DHCP scope and assigned them as additional static addresses.  Today, I find that nslookup for IP addresses in the decommissioned dynamic scope shows me the hostname of a DHCP node that is actually at a different IP in the new dynamic scope.  The node I assigned as a static IP in this new static scope (the decommissioned range of my dynamic scope) shows the hostname that could only have come from a lease in the old network instead of the correct hostname.
The DHCP configuration on a Windows Server2008R2 domain controller looks right, but something got missed.  This is the only server in the domain with that role.
0
Comment
Question by:HerrBall
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 3

Accepted Solution

by:
Rezwan Islam earned 500 total points
ID: 40590403
Without assuming too much I would check into the following;

Try ipconfig /flushdns to see if that clears DNS cache.
May be check your DNS for any static DNS entry for that host.
Does the host have a second adapter / secondary IP?
0
 

Author Closing Comment

by:HerrBall
ID: 40598255
Turns out that there was no static entry for the current hostname at that address..  I added some static addresses and enabled DHCP scavenging.  Thanks
0

Featured Post

SharePoint Admin?

Enable Your Employees To Focus On The Core With Intuitive Onscreen Guidance That is With You At The Moment of Need.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

We recently endured a series of broadcast storms that caused our ISP to shut us down for brief periods of time. After going through a multitude of tests, we determined that the issue was related to Intel NIC drivers on some new HP desktop computers …
Resolve DNS query failed errors for Exchange
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

732 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