Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Changing existing DHCP Scope

Posted on 2008-10-14
4
Medium Priority
?
1,199 Views
Last Modified: 2012-06-27
I need to move my existing DHCP scope to make room for a VOIP phone system.  My existing scope is 192.168.25.25 - 192.168.25.99.  The current lease timeout is 3 days.  Can I simply change the scope to 192.168.25.110 - 192.168.25.199 without deleting and recreating?  How will this affect those current leases?  I've already verified that the new planned DHCP range addresses are available and the VOIP system won't be in place until Nov/Dec.  Any help would be appreciated, thanks.
0
Comment
Question by:RMFIT
4 Comments
 
LVL 12

Expert Comment

by:michaelgoldsmith
ID: 22715025
Change the current scope to the new scope and then you have a few options:

1. Do an ipconfig/release ipconfig/renew on all of the domain PC's
2. Reboot each PC.
0
 
LVL 18

Expert Comment

by:exx1976
ID: 22715062
Or just wait 3 days and they'll all get the new addresses themselves.  Since you have until Nov/Dec, this is a non-issue..

Release/renew or reboot is only a big issue if you change the actual DHCP server (meaning move the DHCP service to a diffierent server altogether, not just change the scope), since the client will try to auto-renew against the old DHCP server.
0
 
LVL 26

Accepted Solution

by:
Pber earned 200 total points
ID: 22715713
You can't change a scope in Microsoft DHCP.  You must delete and create new ones.  In your situation since you aren't really expanding a scope, but creating a new address range, you just need to create the new scope as you have mentioned, then disable the old scope.  The leases will still remain active until a renew even with the scope disabled.  As previously mentioned, the next renew of the lease should pick up a new address in the new scope.

You can then delete the old scope and re-define your addressing for your VOIP system.
0
 
LVL 1

Author Closing Comment

by:RMFIT
ID: 31506037
Worked just as explained, thanks!
0

Featured Post

Become an Android App Developer

Ready to kick start your career in 2018? Learn how to build an Android app in January’s Course of the Month and open the door to new opportunities.

Question has a verified solution.

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

Article by: rfc1180
The Maximum Segment size (MSS) is an important consideration when troubleshooting connectivity via the Internet/Intranet. As the packets are routed via the Internet/Intranet, the packets must traverse through multiple routers in the path between two…
Network ports are the threads that hold network communication together. They are an essential part of networking that can be easily ignore or misunderstood, my goals is to show those who don't have a strong network foundation how network ports opera…
Despite its rising prevalence in the business world, "the cloud" is still misunderstood. Some companies still believe common misconceptions about lack of security in cloud solutions and many misuses of cloud storage options still occur every day. …
Is your OST file inaccessible, Need to transfer OST file from one computer to another? Want to convert OST file to PST? If the answer to any of the above question is yes, then look no further. With the help of Stellar OST to PST Converter, you can e…

580 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