We help IT Professionals succeed at work.

What is the best way to set up a redundant DHCP server on a second DC in a domain?

chitchcock
chitchcock asked
on
Medium Priority
860 Views
Last Modified: 2013-12-23
I use W2K server and just setup a secondary DC.  I believe I can simply add DNS to it for redundancy but I would also like to add a redundant DHCP server.  My current DHCP server issues IP address to 10.1.1.100 through 10.1.1.254 subnet 255.255.255.0 with reservations 1-100

I am looking for the easiest possible way to do this.  Thanks
Comment
Watch Question

Solution Architect
CERTIFIED EXPERT
Most Valuable Expert 2014
Top Expert 2014
Commented:
Microsoft typically recommends a 80 / 20 lease split in your scope. Personally I have never quite understood there mentality behind this as this could still mean incomplete redundancy in my book.

The question I have to ask...how many hosts are using up those 154 IP addresses? If you only have say 50 hosts then I would configure one server with a lease range of 10.1.1.100 - 10.1.1.175 and the other as 10.1.1.176 - 10.1.1.254.

You don't want the scopes to overlap from each server or you might be handing out duplicate IPs. Ultimately you are creating the same exact scope on each server, with the same scope options (DNS server IP address etc) but you are going to reserve the block 10.1.1.100 - 10.1.1.175 on one and 10.1.1.176 - 10.1.1.254 on the other.

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts

Author

Commented:
I have about 110 users accessing this segment.  So all I would need to do is enable DHCP on server 2, create a scope different then scope on server 1.  Or do I just set exlusion ranges on each that won't interfere with each other?  DHCP discovery by clients will just get the first handed to them but both will update DDNS automagically?
Gareth GudgerSolution Architect
CERTIFIED EXPERT
Most Valuable Expert 2014
Top Expert 2014

Commented:
Yep. Create the same scope and set exclusions on each. In your case I guess the 80 / 20 IP scheme would work :D

You may also want to consider expanding your 10.x subnet so you can have total redundancy.

Author

Commented:
thanks
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.