Client ip address changed without notice

anonymous_at_discussions.microsoft.com
Date: 05/18/04 

Date: Tue, 18 May 2004 16:27:21 -0700

When DHCP server giving the IP it will tell the client
how long you can use that IP. That is IP lease time. When
the lease time cross the 50 % of time Client will ask
DHCP server can I use the IP once again. If no reply I
will not worry
But it will ask once again when it reaches to 87.5%. If
during this time if DHCP server not replies then it will
ask others can I get IP? (Send message to all)

This will get IP incase you DHCP from other application
incase they are active
Other application which gives IP are
Some proxy software, ICS (from XP System )

If nobody reply then it will assign itself 192.168.series

To over come this problem.

Increase the lease time. If u have server on remote
location install DHCP

>-----Original Message-----
>A user in a remote office reported that they suddenly
lost their
>network connection.
>
>This has happened twice in the last week to the same
machine. I took a
>look at their machine just now and did an ipconfig /all.
>
>Their ip address had changed from xxx.xxx.xxx.xxx to
169.xxx.xxx.xxx.
>This would explain why they lost all connection to the
network because
>our network in the remote office does not use 169.
>
>The remote office has a Sonicwall that assigns IP
addresses to the
>machines using DHCP.
>
>Any thoughts why a NIC adapter would change IP address
during
>operation without any user intervention? I'm assuming
it's either the
>NIC or the Sonicwall. Could some form of malicious
software have
>changed the IP?
>
>Before I arrived, the user had done multiple reboots and
power downs
>and still could not get to the network. After I arrived
and viewed the
>settings, I powered down and it came back up with the
correct DHCP
>assigned address for our network.
>
>Thanks,
>Eric
>.
>

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