Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 138
  • Last Modified:

nslookup shows a host from a decommissioned DHCP scope

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
HerrBall
Asked:
HerrBall
1 Solution
 
Rezwan IslamSystems AdministratorCommented:
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
 
HerrBallAuthor Commented:
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 On Demand] Database Backup and Recovery

Does your company store data on premises, off site, in the cloud, or a combination of these? If you answered “yes”, you need a data backup recovery plan that fits each and every platform. Watch now as as Percona teaches us how to build agile data backup recovery plan.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now