Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

DHCP Not Handing out Certain Addresses

Posted on 2010-09-01
7
Medium Priority
?
615 Views
Last Modified: 2012-05-10
We're running a DHCP server on a Windows Server 2003 computer.  The scope is from 192.168.0.28 - 192.168.0.155.  In the event viewer there is a message that there are no more addresses available to hand out and that all the addresses are leased, yet there are some addresses within the range that aren't listed as leased and that aren't reserved.  Why would the server not hand out these addresses?  
0
Comment
Question by:Declan_Basile
  • 4
  • 3
7 Comments
 
LVL 6

Expert Comment

by:rnicolaus
ID: 33578543
can you at least temporarily create another pool of 10 or so addresses and have a retry?  We'll see if there is a problem on the server end.
0
 
LVL 1

Author Comment

by:Declan_Basile
ID: 33579495
How will the server decide which pool to hand out an address from if both pools have available addresses?  Is there a way to tell the server to give out a leased address to a different computer if there aren't any more addresses available and the computer that has the address isn't currently connected?
0
 
LVL 6

Expert Comment

by:rnicolaus
ID: 33579804
No way to give out an address if all are taken from the pool, unless you make a reservation for the particular computer NIC's MAC address.  Do you need to know how to do that?
0
Nothing ever in the clear!

This technical paper will help you implement VMware’s VM encryption as well as implement Veeam encryption which together will achieve the nothing ever in the clear goal. If a bad guy steals VMs, backups or traffic they get nothing.

 
LVL 1

Author Comment

by:Declan_Basile
ID: 33580864
I know how to do that.  My issue is that there are 9 addresses that are neither reserved nor leased.  Why is the DHCP server not handing out these addresses?  I just "reconciled" the scope and the list of 9 addresses appeared.  Then reconciled it again and the second time it said that the database was consistent with the registry.  I looked at the statistics.  It says that all 108 addresses are used.  I have a range of 192.168.0.28 - 192.168.0.155 (128 addresses - 20 reserved addresses = 108).  I physically counted each entry in the list of leases and there are only 99 leases.  It should have 9 more addresses to hand out.
0
 
LVL 6

Expert Comment

by:rnicolaus
ID: 33581632
Are you sure there are no exclusions?
0
 
LVL 6

Expert Comment

by:rnicolaus
ID: 33581642
If you accounted for all the IP addresses handed out, which ones are not being assigned?
0
 
LVL 1

Accepted Solution

by:
Declan_Basile earned 0 total points
ID: 33587887
Some time after reconciling,  the 9 addresses showed up in the list of leased addresses.  For each lease, the computer name was the same as the IP address.  I deleted the leases.  They never came back and now it's handing out addresses.  I had to reconcile and then delete the entries to fix the problem.  
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Ever wondered why you had to use DHCP options (dhcp opt 60, 66 or 67) in order to use PXE? Well, you don't!
Learn how to PXE Boot both BIOS & UEFI machines with DHCP Policies and Custom Vendor Classes
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…
Are you ready to place your question in front of subject-matter experts for more timely responses? With the release of Priority Question, Premium Members, Team Accounts and Qualified Experts can now identify the emergent level of their issue, signal…

783 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