XP won't release IP on shutdown

7 May 2007 2:00 PM

chazz

I am not totally sure this is an XP issue or a laptop issue. At my workplace
we have about 25 laptops that all go home for the evenings with the users.
The users who go home and connect to their routers are given an IP (DHCP) and
everything is fine. When they shutdown the laptop and bring it to work the
next morning the laptop acts as if it never left the previous network and
tried to keep the same IP, causing conflicts on our network. If you
disconnect from the network at home, shutdown, then come to work it works
fine.

The laptop's are all Dell brand (D600, D610, D620, D800, D810) with Windows
XP SP2.

We did everything we could on our DHCP server to release all IPs on shutdown
so it causes no problems when the employee gets home but coming back is
causing this pain.

Any suggestions?

7 May 2007 7:22 PM

Chuck

On Mon, 7 May 2007 07:00:00 -0700, chazz <ch***@discussions.microsoft.com>
wrote:

Show quoteHide quote

>I am not totally sure this is an XP issue or a laptop issue. At my workplace
>we have about 25 laptops that all go home for the evenings with the users.
>The users who go home and connect to their routers are given an IP (DHCP) and
>everything is fine. When they shutdown the laptop and bring it to work the
>next morning the laptop acts as if it never left the previous network and
>tried to keep the same IP, causing conflicts on our network. If you
>disconnect from the network at home, shutdown, then come to work it works
>fine.
>
>The laptop's are all Dell brand (D600, D610, D620, D800, D810) with Windows
>XP SP2.
>
>We did everything we could on our DHCP server to release all IPs on shutdown
>so it causes no problems when the employee gets home but coming back is
>causing this pain.
>
>Any suggestions?

Try "ipconfig /release" then "ipconfig /renew".

--
Cheers,
Chuck, MS-MVP [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My email is AT DOT
actual address pchuck mvps org.

7 May 2007 8:06 PM

4wunders

On May 7, 7:00 am, chazz <c***@discussions.microsoft.com> wrote:
Show quoteHide quote

> I am not totally sure this is an XP issue or a laptop issue. At my workplace
> we have about 25 laptops that all go home for the evenings with the users.
> The users who go home and connect to their routers are given an IP (DHCP) and
> everything is fine. When they shutdown the laptop and bring it to work the
> next morning the laptop acts as if it never left the previous network and
> tried to keep the same IP, causing conflicts on our network. If you
> disconnect from the network at home, shutdown, then come to work it works
> fine.
>
> The laptop's are all Dell brand (D600, D610, D620, D800, D810) with Windows
> XP SP2.
>
> We did everything we could on our DHCP server to release all IPs on shutdown
> so it causes no problems when the employee gets home but coming back is
> causing this pain.
>
> Any suggestions?

It is not up to the server to release the IP addresses. If the client
does not release the IP address when shutting down, then the server is
duty-bound to maintain that IP for that client until it is either
released by that client or the lease expires. On the server, try
setting your IP leases to expire after 8 hours -- then the lease on
any machine taken home will expire on both ends overnight and will
automatically be re-negotiated in the morning. Leases are usually re-
negotiated when the lease is 1/2 over so once obtained, the lease
should not change unless the machine is disconnected.

HTH,
John