Solved

Why are active DHCP leases showing as Reservation (inactive)?

Posted on 2009-05-14
3
6,024 Views
Last Modified: 2012-05-07
We have a DHCP scope setup with an exlusion range to match the range for distribution.  We are doing this so that users are unable to put random systems on the network without our knowledge.  We have reservations setup for all of the systems.  Once we set the clients to acquire an IP address automatically, the Lease Expiration column displayed 'Reservation (active)'.  However, later on during the day the column displayed 'Reservation (inactive)' for quite a few of the systems, to include mine.  I have the lease expiration in the scope set for 7 days.  If the clients are within their lease date range, why are they showing as inactive?
0
Comment
Question by:abyss0208
[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 Comments
 
LVL 11

Expert Comment

by:techzter
ID: 24384782
Are the machines not powered on at the time, or in sleep mode? That is when I notice reservations shown as inactive.
0
 

Author Comment

by:abyss0208
ID: 24384947
I had thought that too but the system I am currently working on was showing as inactive as well.  It didn't show as active again until I did an ipconfig /renew
0
 
LVL 7

Accepted Solution

by:
MariusSunchaser earned 500 total points
ID: 24386020
Hi there.
There is nothing to worry about. The reservation is set to active after the specife equipment asks for an IP and the DHCP server serves it the reserved IP.
For example:
If you make a reservation on your computer, and your computer has manual IP set, or the lease time didn't expire, than the reservation will be displayed as inactive. This is only a display thing, there is nothing to worry about.
If you want to be happy and see it as active, set your computer for DHCP and release/renew IP. After the DHCP server gives it the reserved IP, the reservation will be displayed as active.

Same thing happens with a printer. many network admins set printers with manual IP, but make a reservation for the printer's MAC on DHCP, to be sure they are clean of IP conflicts. Howether, the reservation won't be displayed as active until the DHCP serves the printer with the reserved IP (for that to happen, he must set the printer for DHCP, and reboot it).
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

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!
A Cisco router can be configured as a DHCP Server. There are advantages and disadvantages in making your Cisco router work as DHCP Server. Almost all the features for windows DHCP can be configured on Cisco-based DHCP server. Some of the features me…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…

622 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