Solved

DHCP Question

Posted on 2011-03-10
3
267 Views
Last Modified: 2012-05-11
Hi Experts
All my Clients that are on DHCP obtain a lease that is set to expire after the standard 8days

If i delete my leases from the DHCP scope which are currently in use. Then disable that DHCP scope and unauthorise the server will the clients not look for a new ip address until either a reboot or the 8days has expired. So any computer left on even though the scope has changed does the client still keep it's address?

So what i am asking is does DHCP comunciate with it's clients if it changes and update. I predict the client just gets an IP and then forgets about it until a reboot or a ipconfig /renew etc.
 
I am planning on turning off my current DHCP server and going to a new DHCP server.
But want to ensure if a computer does not turn off overnight it wont have an ip address that technically could be given out again on the new DHCP server.

Thanks
0
Comment
Question by:flowit
  • 2
3 Comments
 
LVL 16

Expert Comment

by:Brian Pringle
ID: 35094705
The workstations will retain their current assigned IP address until they are shut off or until something else triggers a renewal of the IP address.

The bigger concern will be that you could end up with two computers with the same IP address if one renews it address.  
0
 

Author Comment

by:flowit
ID: 35094868
What do you mean by  "something else triggers a renewal of the IP address".

So DHCP is not clever enough to communicate with it's clients and update it's lease expired time etc?

Did not think so. It just assigns IP's on bootup or renewal requests. When they bootup it would normally give the same IP if it was available uses MAC addresses etc
0
 
LVL 16

Accepted Solution

by:
Brian Pringle earned 500 total points
ID: 35095027
Updates will trigger renewal.  Dhcp doesn't update...  It just responds to requests from the clients.  So, if a computer has a leftover IP address and a new one requests an address from the new server, they might have the same address.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

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…
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

803 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