IP Address change in AD Integrated domain

[albertwt]

Hi,

 

This will be my first step to change all of the office machine IP address (from Public routable into private class A)

 

1. Get all workstation IP registered using DHCP (Using VBScript).

2. Set the server IP manually into new IP addressing scheme (don't know what to do with the DNS Servers, Exchange and DC :-| ).

3. Change the IP addressing scope from DHCP and let it replicate.

 

am I missing something here ?

 

Any help and suggestion would be appreciated.

 

Thanks.

Edited June 17, 2009 by ZeroHour
title type

[albertwt]

more information on point #2: I understand that i need to change the IP address manually from the DHCP address list once the client is assigned a certain IP address from the DHCP server, but I'm still not sure if it is OK to manually change the IP address of the following servers:

 

1. Primary DNS Server itself (which records should I change it first).

2. Domain Controllers

3. Exchange Server

 

I can be sure that changing the worstations IP address is going to be fine but still bit worried about changing those servers IP address listed above.

 

can anyone shed light in this matter please ?

[SYNACK]

With regard to changing the IP addresses you will want to change the DNS configuration first by adding a new zone for your new ip address range and a new reverse lookup zone. You should then be able to change the ip addresses of the servers (you can setup two ips on a single NIC for an easier transition) and delete the existing dhcp configuration then add a new one with the appropriate new default gateways, DNS servers and address range.

 

Once this is done rebooting each of the clients so long as they are on DHCP should provide them with new addresses and give you back network connectivity. Be aware of staticly configured ips on stuff like printers that you will have to clean up manually.

Edited June 17, 2009 by SYNACK

[albertwt]

Hi SYNACK,

 

thanks for the fast reply, I'm wondering about the other non standard entries such as:

_msdcs

_sites

DomainDnsZones

ForestDnsZones

 

and all of the child entries underneath each respective node, do I have to create it manually or it will be created automatically ?

[SYNACK]

It should be created automaticlly if I remember correctly, just build the new zones first and setup the server nics with secondary ips, when they register themselves against the DNS server they should create these records. If not the old system is still in place and working while you trigger it manually.

[albertwt]

wow, that is something that I didn't think about SYNACK :-)

 

good idea in making all of my current Servers NIC to have the new IP address as the additional IP.

 

hopefully nothing should go wrong with the DC+GC, Primary DNS Server and the DHCP itself as they're on one single server.