Solved

One forest, two child domains, three subnets

Posted on 2014-01-12
4
383 Views
Last Modified: 2014-01-23
I need some serious help.....

I have been charged with setting up two separate domains that will share resources and reside on the same forest yet have thier own subnets.  Is this possible?

I have setup a 2008 forest.  I am trying to set up one of the 2008 child domains but of course during dcpromo, the new dc doesn't see the forest because it is on a different subnet.

I can ping the forest server.  All subnets have been created on the router and all can access the internet.

What am I doing wrong or missing?  Anyone?  Pleeeeeease......
0
Comment
Question by:carolinasgirl28
  • 2
4 Comments
 
LVL 6

Expert Comment

by:Sasa Kranjac
ID: 39775397
You have network connectivity between the servers - the routing is working. Did you run ping using netbios, FQDN or IP address?
Is DNS working? Have you tried nslookup and checked if the name resolution works as it should?
The steps are:
1. verified and working connectivity (addressing, routers, gateways)
2. verified and working name resolution (names, FQDNs, name servers, services, DNS records...)
3. only when 1. and 2. are working flawlessly proceed setting up Active Directory

Please double check steps 1. and 2.

Can you post the error you get when dcpromo fails?
0
 

Author Comment

by:carolinasgirl28
ID: 39775462
I am in the process of putting everything back (painstakingly) so that everyone can funcion Monday morning. I will have to try this again next weekend.

All servers are connected via fibre.
Could ping servers via ip address

The error I got from dcpromo was that the forest could not be contacted.  I'm assuming because the server was on another subnet?
0
 
LVL 6

Expert Comment

by:Sasa Kranjac
ID: 39775487
I suspect that it might be a name resolution issue (DNS) because you have connectivity and DC still could not be contacted.
0
 
LVL 6

Accepted Solution

by:
Brad Held earned 500 total points
ID: 39775630
So on the new server, its dns must only point to DC's in the parent domain.

So if ServerB is the child DC then it's dns must point to ServerA in the Parent.

Once its promoted and child domain is created, then some conditional forwarders need to be in place or the DNS forward lookup zones need to be replicated forest wide. This will allow clients to locate those resources in the other domain(s).
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Is your computer hacked? learn how to detect and delete malware in your PC
Use of TCL script on Cisco devices:  - create file and merge it with running configuration to apply configuration changes
Edureka is one of the fastest growing and most effective online learning sites.  We are here to help you succeed.
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now