?
Solved

nslookup shows a host from a decommissioned DHCP scope

Posted on 2015-02-04
2
Medium Priority
?
126 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 2000 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

[Webinar] Lessons on Recovering from Petya

Skyport is working hard to help customers recover from recent attacks, like the Petya worm. This work has brought to light some important lessons. New malware attacks like this can take down your entire environment. Learn from others mistakes on how to prevent Petya like worms.

Question has a verified solution.

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

This article is in response to a question (http://www.experts-exchange.com/Networking/Network_Management/Network_Analysis/Q_28230497.html) here at Experts Exchange. The Original Poster (OP) requires a utility that will accept a list of IP addresses …
I'm a big fan of Windows' offline folder caching and have used it on my laptops for over a decade.  One thing I don't like about it, however, is how difficult Microsoft has made it for the cache to be moved out of the Windows folder.  Here's how to …
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses

762 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