Moving DC to another site.

April 14, 2011 at 10:27:35
Specs: server 2000
Hello, I have 2 DC's in one site, we are moving to another site which I will tie up over site to site VPN until I get the point to point T1. I have to change the subnet in this site and I will need to move over these 2 DC'2 that's all I have, there is nothing else replicating somewhere else but these two. Is this as easy as right click on "move" from Active Directory Sites and Services and give out the new ip subnet?
How about DNS?

thanks


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#1
April 14, 2011 at 11:06:18
if you are just moving why are you changing your lan ip? There is no reason to do so.

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#2
April 14, 2011 at 13:41:29
there is a reason behind it and I need to change it.

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#3
April 14, 2011 at 14:35:28
I see. You have a reason but are not willing to share why. So why are you asking for advice again?

You do understand you can set the new site subnet to exactly what you have now?
This means you don't have to make ANY changes whatsoever. You just pick the equipment up and put it in the new location.

If you want to change, and are ready for a ton of work, then you will need to reconfigure DNS as well as DHCP and all statically assigned devices like switches/servers

If you want to do this then I would suggest you get started on this now before the move. Otherwise you can find yourself with a mess and not know where to begin looking.

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#4
April 15, 2011 at 13:53:36
I have 2 more routers and a sonicwall to reconfigure if I add this subnet over VPN site to site so I though it would be easier to change it to .151 untill I get my T1 line installed. But you're saying it's alot of work?

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#5
April 15, 2011 at 15:29:52
Lets review your original question

1. "I have 2 DC's in one site, we are moving to another site"
2. "I have to change the subnet in this site and I will need to move over these 2 DC'2 "
and now some additional info
3. "I have 2 more routers and a sonicwall to reconfigure "

Moving to a different site has nothing to do with changing your internal ip plan. This makes statement 2 invalid.
Moving to a different site means ONLY your external ip is going to change. If a different provider than before so will the associated isp dns server ips will change.

It would be a HUGE amount of work to change your internal ip plan which is what I was getting at as well as doing so is completely unnessesary.

Do you understand why you don't have to change your internal ip?

Given the situation the only thing you would need to change is in the dns servers forwarders. You would need to change them from the old isp to the new one if getting a new isp for this location. Same isp no changes required.

You mention two routers and a sonicwall. You would need two sonicwalls to make a site to site vpn normally. If you are going to try using one of those routers I would suggest you talk to sonicwall support first to see if its possible and that your router is supported for this operation.

In my neck of the woods I can get more bandwidth with a VPN then with a T1. Remember now a T1 only gives you 1.5mbps if doing point to point. If doing frame relay the throughtput is FAR LESS. From Comcast cable I can get
100Mbps upstream / 15Mbps downstream: $369.95
which is the same price I am paying for a point to point T1

What is still unclear to me is you say you are moving the site but then you speak about vpn and t1. Are you keeping both sites but just moving the servers?

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#6
April 16, 2011 at 06:01:57
thanks for your reply again, let explain a bit more and this is the reason why this move got me a little confiused. I understand what you explained above and also about why changing the private IP which is 192.168.150.x to 192.168.151.x
my concern is that there is a Juniper and a cisco router that knows how to get to .150 subnet Via T1 at this point so if I configure a VPN site to site using the same subnet dont you think that could cause a traffic conflic or perhaps my sonicwall wont allow it? or it's a matter of just turning off the eth port on the juniper that is attached to the .150 subnet?
This is my original though of why I should change the IP to something else like .151 until I get the T1 installed...what you recommend to do?

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#7
April 20, 2011 at 08:11:16
Are you keeping both sites but just moving the servers?

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