Solved

IP Address

Posted on 2002-03-18
3
178 Views
Last Modified: 2010-04-11
Hi,
Is an IP address released each time a machine is shut down and restarted? How does a static or dynamic address play into the equation? Thank you,
D
0
Comment
Question by:dingo11
  • 2
3 Comments
 
LVL 8

Accepted Solution

by:
scraig84 earned 100 total points
ID: 6877905
With a static address, there is no concept of release and renew as it is just on the machine you put it on.  If you are asking if another machine can use that IP address while one is off, the answer is yes - but that is a very bad practice and often will have consequences.

With a dynamic address, the DHCP server has a lease period, and will not give an address out to another machine for the duration of the lease.  When a computer is shut off, the DHCP is not contacted.  However, when a machine is turned back on, it will contact the DHCP server to make sure it is there and verify the lease.  Depending on the client, it may just go ahead and renew the lease at this point.  Otherwise, it will typically wait until 1/2 of the lease duration has expired, and go ahead and try to renew the lease at that point.  If it is unsuccessful, it will wait until 3/4 of the lease has expired, then 7/8 and so on.  If the machine does not successfully renew the lease before it expires (if it shut off for example), the lease is terminated and the address goes back to the available pool to be handed out again, and it is likely the machine will get a new IP address when it is turned back on.

Hope that helps.
0
 
LVL 8

Expert Comment

by:scraig84
ID: 6877916
Here is a good resource also:

http://www.dhcp-handbook.com/dhcp_faq.html
0
 

Author Comment

by:dingo11
ID: 6889341
Thanks, sorry about taking a while I had an some urgent matters pop up. Have a great day,
d
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

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

Suggested Solutions

Join Greg Farro and Ethan Banks from Packet Pushers (http://packetpushers.net/podcast/podcasts/pq-show-93-smart-network-monitoring-paessler-sponsored/) and Greg Ross from Paessler (https://www.paessler.com/prtg) for a discussion about smart network …
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

770 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