DHCP client still looks for the failed dhcp server for renewal

I set up two dhcp servers for the same scope with exclusion for failover.
However, when I shutdown one dhcp server, issued ipconfig /renew on its
client, the client did get a new ip address from the alternate server but
kept its original ip address. Turned on Ethereal for monitoring to find out
that the client was looking for its original dhcp server for renewal.

This might be a proper behaviour as the default gateway is still the same
and no problem for connectivity or waste of IP addresses. However, how about
if I need to change my original DHCP's ip address without changing the
default gateway? Do I have to release and then renew all client ip addresses?

Many thanks

--
Frank

If a DHCP client is unable to renew an unexpired lease and it can still ping
its configured default gateway, it will continue to use the original IP.

Doug Sherman
MCSE, MCSA, MVP+I, MVP

"frankcvc" <(E-Mail Removed)> wrote in message
news:E41D5287-6E9F-4A3F-A478-(E-Mail Removed)...
> I set up two dhcp servers for the same scope with exclusion for failover.
> However, when I shutdown one dhcp server, issued ipconfig /renew on its
> client, the client did get a new ip address from the alternate server but
> kept its original ip address. Turned on Ethereal for monitoring to find
out
> that the client was looking for its original dhcp server for renewal.
>
> This might be a proper behaviour as the default gateway is still the same
> and no problem for connectivity or waste of IP addresses. However, how
about
> if I need to change my original DHCP's ip address without changing the
> default gateway? Do I have to release and then renew all client ip
addresses?
>
> Many thanks
>
> --
> Frank