How to replace existing DHCP Scope with a new one?

Okay, so I konw there are a gazillion "how to change DHCP scope" questions but I just want to confirm the network affects of creating new scope that replaces an existing one.
So here is what i understand. In order to extend my DHCP range i have delete the existing scope and create a new scope with same IP range (different subnet mask)
1. Delete the old scope with subnet mask
2. Create a new scope with subnet mask

So how long does it take the network to "recover" from this change?
In the mean time does the network stop working?
the network has to be working by Monday AM

thank you
ronfastI.T. DirectorAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

It will really depend on your lease duration.

I would run the following each DHCP client to ensure that it is reflecting the new scope configuration:

ipconfig /release & ipconfig /renew
ronfastI.T. DirectorAuthor Commented:
oh yeah. great point I should have thought of that. THis is the first time I've done this and it makes me nervous when I delete network stuff.
Understood. Good luck with your new configuration.

Out of curiosity, why are you requesting the question to be closed versus answered?

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Determine the Perfect Price for Your IT Services

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden with our free interactive tool and use it to determine the right price for your IT services. Download your free eBook now!

ronfastI.T. DirectorAuthor Commented:
Oh no. I didn't mean a request to close. Arg. Not intentional.
ronfastI.T. DirectorAuthor Commented:
One more question. All of my servers have mask do i change all of those as well or just the DHCP mask
As long they are DHCP recipients, the scope will take care of them.
ronfastI.T. DirectorAuthor Commented:
thank you so much!! I took the plunge and all the clients are getting the IPs.

You're welcome. Good luck.
ronfastI.T. DirectorAuthor Commented:
Okay, so i'm sorry one more question.
When you have the new subnet mask., the first IP addressed are
When it fills that range what will the new IPs look like?
Sorry, but subnet masking is definitely not one of my strengths.
ronfastI.T. DirectorAuthor Commented:
there was a DHCP calculator on a website that i used.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Windows Server 2008

From novice to tech pro — start learning today.