Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

Redundancy for Domain on Server2003

Posted on 2011-02-13
7
Medium Priority
?
426 Views
Last Modified: 2012-05-11
I have two domain controllers, both with AD on them. recently the power supply failed in the main domain controller. I assumed that I could enable the DCHP on the other controler and everything would be ok. however I was unable to log onto the second server as it could not authenticae my logon. If I logged on locally I could not activate the DHCP, as I didn't have enough permissions.
I got over the problem by finding a new power supply for the primary domain controller, but I want to make sure that if I loose the main server again I can switch to the other on.

What am I doing wrong?

0
Comment
Question by:jontyplatt
7 Comments
 
LVL 28

Accepted Solution

by:
MAS earned 668 total points
ID: 34882160
0
 
LVL 27

Assisted Solution

by:KenMcF
KenMcF earned 668 total points
ID: 34882161
First I would verify both are Domain Controllers. It does not sound like your second server is a DC, you would not be able to login localy on it.

I would make sure the second DC is running DNS and the DC is pointing to itself for resultion as one of the DNS servers. The second DC should be a Global Catalog server and DNS server. Here are some links with steps to add ana dditional DC.

http://www.petri.co.il/how_to_install_active_directory_replica_on_windows_2003.htm
http://technet.microsoft.com/en-us/library/cc738032(WS.10).aspx
0
 
LVL 70

Assisted Solution

by:KCTS
KCTS earned 664 total points
ID: 34882221
The usual cause od the symtptoms you describe is that the second DC is not a Global Catalog or DNS server.
Ypu need to make sure the server is a global caltalog server -see http://support.microsoft.com/kb/313994

You should also install DNS on the new machine - just install DNS and assuming you are using AD integrated DNS it will replicate automactically.

You also ned to make sure the clients are set to use one of your DNS servers as the PREFERRED (first) DNS server and the other as the ALTERNATE(second DNS server), - normally by adding both server Is to the DHCP scope options.

While on the subject of DHCP - why not have DHCP running permananetly on BOTH machines - the simplest solition is to just split your current scope doen the middle - so if for example you are current;y using a scope on 192.168.1.1 - 192.1681.200, then modift your current DHCP server to have a scope of 192.168.1.1 - 192.1681.100  and set the other one to 192.168.1.101 - 192.1681.200
0
Veeam Disaster Recovery in Microsoft Azure

Veeam PN for Microsoft Azure is a FREE solution designed to simplify and automate the setup of a DR site in Microsoft Azure using lightweight software-defined networking. It reduces the complexity of VPN deployments and is designed for businesses of ALL sizes.

 

Author Comment

by:jontyplatt
ID: 34882510
Yes - DHCP is another issue, beacuse I only have 254 addresses and I only have about 40 free. In addition I have about 30 static IP addresses (WAP and Printers, IP Phone system etc). I have considered rescoping or using a SuperScope, but really this ought to be the suject for another question.

Thinking back I now remember that I was not able to log ontot he second server locally, and I am sure that I have the DNS and AD running on both machines - I remember checking that the users sere on both and when I added to one it was automatically added to teh other.

Basically I am going to start again with a cheap box and add 2003 to it and then follow the instructions about. I might also move my DHCP reservations across using the DHCP mdb files and check it all runs.

Is this a good idea?
0
 
LVL 28

Expert Comment

by:MAS
ID: 34885718
As mentioned above please check your second DC is a global catalog or not.

0
 
LVL 28

Expert Comment

by:MAS
ID: 34940669
Importanat note:
Best practice,not to install Infrastructure Master (IM) role on the same domain controller as the Global Catalog server (.i.e.Primary DC). If the Infrastructure Master runs on a GC server it will stop updating object information because it does not contain any references to objects that it does not hold. This is because a GC server holds a partial replica of every object in the forest.
0
 
LVL 70

Expert Comment

by:KCTS
ID: 34940976
In response to @abbasiftt's comment

Having the Infrastructure Master on the same machine as the Global Catalog is only an issue in a multi-domain environment where not all machines are Global catalogs - if you don't have multiple domains it not an issue. If you do have multiple domains and all yor machines are GCs, then again ita NOT an issue
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

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

Setting up a Microsoft WSUS update system is free relatively speaking if you have hard disk space and processor capacity.   However, WSUS can be a blessing and a curse. For example, there is nothing worse than approving updates and they just have…
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
This lesson discusses how to use a Mainform + Subforms in Microsoft Access to find and enter data for payments on orders. The sample data comes from a custom shop that builds and sells movable storage structures that are delivered to your property. …
Look below the covers at a subform control , and the form that is inside it. Explore properties and see how easy it is to aggregate, get statistics, and synchronize results for your data. A Microsoft Access subform is used to show relevant calcul…

810 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