DHCP Diferences Between Windows 2000 & XP

[Guest]

I have noticed that the Windows XP Pro keeps his DHCP assigned IP address
even after a reboot and then tries to keep the same IP from the prior lease.
When the client computer tries to get an IP on a different subnet though the
DHCP request is told by the DHCP server not to use (Negative Ack) the
original IP.

I am looking for documentation that lists these diferences between Winodws
XP and the prior versions of Windows in terms of DHCP operation.? Is this
also possibly a server side DHCP setting or is it all client side DHCP?

 

[John Wunderlich]

I have noticed that the Windows XP Pro keeps his DHCP assigned IP
address even after a reboot and then tries to keep the same IP
from the prior lease. When the client computer tries to get an IP
on a different subnet though the DHCP request is told by the DHCP
server not to use (Negative Ack) the original IP.

I am looking for documentation that lists these diferences between
Winodws XP and the prior versions of Windows in terms of DHCP
operation.? Is this also possibly a server side DHCP setting or
is it all client side DHCP?

The behavior you note is exactly as documented in RFC 2131 (DHCP
Specification). The client has the option to request the last IP that
it had and the server has the option to deny it and supply another (the
server itself potentially remembering the last IP that that particular
client had on that subnet).

There is a strong tendency to maintain the same IP address in the DHCP
specification.

ref: <http://www.faqs.org/rfcs/rfc2131.html>

HTH,
John