New Client Picks Up Old Client IP Address, Both now Share?

[kjv1611]

I've stumbled upon this twice.

In our office, I've replaced 20+ computers over the past few months, and in the process, I've noticed this strange occurrence happening twice (could be more, do not yet know for sure):
[ol 1]
[li]Old Computer never fully released IP address, though the computer is history or at least off the domain and not turned on.[/li]
[li]New computer somehow picks up old computers's IP address[/li]
[li]Old Computer still shows on Network via browsing network from Windows as well as pinging the computer name[/li]
[li]When pinging both computer names, results are identical[/li]
[li]Browsing both machines over network are identical[/li]
[li]Old computer so far = XP, new computer = Win10[/li][/ol]

I apparently fixed the first instance by removing the new computer from the domain, and then re-adding to the domain.

Any ideas on:
[ol 1]
[li]What caused this?[/li]
[li]What can I do to prevent it in the future?[/li]
[li]Easiest / Best way to correct the issue as I find it?[/li]
[li]Easy way to query the network to determine any other similar issues?[/li]
[/ol]

Thanks for any thoughts


"But thanks be to God, which giveth us the victory through our Lord Jesus Christ." 1 Corinthians 15:57

 

[DrB0b]

Is this not a DNS issue? We had a similar issue with our DNS servers and nslookup saying a different machine other than what the actual IP was assigned to.

Learning - A never ending quest for knowledge usually attained by being thrown in a situation and told to fix it NOW.

 

[kjv1611]

Yes, it does seem like it could possibly be a DNS issue. Any way to prevent it from occurring in the future?

"But thanks be to God, which giveth us the victory through our Lord Jesus Christ." 1 Corinthians 15:57

 

[rdoubrava]

So the new computer and the old computer have the Same Computer Name?

 

[kjv1611]

Yep. I noticed it on one pair of old and new PCs maybe 2 weeks ago. We fixed that - apparently my taking it off the domain and re-adding fixed it. Then just late last week, I noticed it on yet another pair of computers. For day to day business, it doesn't affect anything, but it sure seems like it could be problematic.

"But thanks be to God, which giveth us the victory through our Lord Jesus Christ." 1 Corinthians 15:57