Solved

What would not be available if I bring down my main DC? I do have a secondary one running.

Posted on 2011-02-14
5
343 Views
Last Modified: 2012-08-13
Hello,
 After hours I need to bring down my virtual main domain controller for about 10 minutes. I do have a secondary one running with ADUC and DNS but not DHCP. Can you forsee any problems happening? Client computers get their DNS server IP's from the DHCP server that resides on the one I'm going to take down.
Server 2008
Thanks all,
BW
0
Comment
Question by:bwinkworth
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
5 Comments
 
LVL 57

Assisted Solution

by:Mike Kline
Mike Kline earned 200 total points
ID: 34888061
You should add the second DC/DNS server (I'm assuming it is also running DNS) to the DHCP scope for secondary DNS.   Is the second box a GC?  If not make it a GC too.

Those recommendations are more for a real "outage" situation too.  

Thanks

Mike
0
 

Author Comment

by:bwinkworth
ID: 34888078
How can I tell if it is a GC?

Thanks
0
 

Author Comment

by:bwinkworth
ID: 34888088
In the DHCP scope on the main domain controller both DNS servers are listed but this is the machine I'm taking down
0
 
LVL 96

Accepted Solution

by:
Lee W, MVP earned 300 total points
ID: 34888101
For a brief period like that, odds are nothing would happen to the clients.  DHCP leases are auto-renewed at half time so if you have a 1 day lease, they are renewed every 12 hours unless they can't be renewed because the DHCP server is unavailable - then they continue counting down until the full time is expired.

Machines that were OFF or restarted will not get an address when they are powered on though if the DHCP  server is unavailable.

If this isn't SBS, you might look into setting up a split scope - where half your DHCP addresses are assigned to one server the the other half to the other server.  In this way, you avoid IP conflicts and you always have a DHCP server available to service DHCP requests.

Yuo might also want to check on whether the second DC is a Global Catalog and if not, make it one (done in Sites and Services).

Doing these things should make it so that you could be down for a week and not notice it.
0
 

Author Closing Comment

by:bwinkworth
ID: 34888682
Thanks to both of you. I've split up the points accordingly. They are both GC's. I've fixed the problem on the main controller w/o having to down it but I'm still going to do a split scope as both of you recommended.

BW
0

Featured Post

NFR key for Veeam Backup for Microsoft Office 365

Veeam is happy to provide a free NFR license (for 1 year, up to 10 users). This license allows for the non‑production use of Veeam Backup for Microsoft Office 365 in your home lab without any feature limitations.

Question has a verified solution.

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

Here's a look at newsworthy articles and community happenings during the last month.
After seeing many questions for JRNL_WRAP_ERROR for replication failure, I thought it would be useful to write this article.
This tutorial will show how to configure a new Backup Exec 2012 server and move an existing database to that server with the use of the BEUtility. Install Backup Exec 2012 on the new server and apply all of the latest hotfixes and service packs. The…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …

726 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