Removing IP Addresses from a DC

[Cache]

Morning!

 

Gradually on my cleanup of the network I've now come to something which I was putting off because I expected it to cause problems. The natsy multiple IP address on a server problem. Don't know why it is set up like this currently, but since it's caused me problems recently it's going to get undone and we'll see what else breaks!

 

Currently my DC's have 4 ip addresses each, 2 on each domain controller I could understand as a remnant of a network merge at some point but I don't understand the other 2 on each DC. So I would like to get the DC's down to 1 ip address each.

 

Anything I need to watch out for while doing this apart from ipconfig /flushdns and /registerdns to make sure that DNS gets updated?

 

Cheers!

[Guest Guest]

Do you have any services which have the IPs hardcoded in ie a webserver or proxy with authentication?

[Cache]

I've fixed IIS as that was causing a problem, will go check our proxy now and see what addresses that is using.

[KWestos]

Could it be that both network cards were assigned an IP address, but were never 'teamed'!

 

Just a thought!

[Guest Guest]

Old servers IP config, DNS?

[Cache]

Both network cards had 2 ip address each so could be the plan was to team them but never got round to it. Got no indication of how long it was set up like that unfortunately. Possibly an old servers IP, iwll see if I can find out anything more.

 

Cheers

[Nixphoe]

I would also check to make sure DHCP doesn't distribute it as a secondary dns, or gateway, etc.

I had this issue as well and a few of our multi function scanners were scanning to the IP of server that we needed to remove. Didn't find that one till after the change.