static ip disappears on reboot

[bonafide247]

I have a problem machine that, upon reboot, loses it's static ip address. It reverts to the standard default private address.

The following measures have been taken:

1) Anti virus scan run and cleaned
2) Spyware scans run and cleaned
3) Msconfig - removed all startup entries.
4) Regedit - Removed suspcious entries out of local-machine/software/microsoft/windows/currentversion/run.

Anyone have any ideas or suggestions on solving this problem?

 

[mobajwa]

It reverts to the standard default private address.
what do you mean by that ?

Does it switch back to DHCP or does it switch back to something like 169.....

-
mobajwa

 

[bcastner]

XP and Windows 2000 Professional have a networking feature that automatically assigns a private IP address from the Internet Assigned Numbers Authority (IANA)—reserved Class B network. This feature is called the Automatic Private IP Addressing (APIPA) functionality. APIPA automatically starts if an XP Pro or Win2K Pro system is configured as a DHCP client and for some reason the DHCP lease can't be assigned or renewed. This problem could occur because of unexpected DHCP server behavior, such as the DHCP server being down, unresponsive, or unreachable. In these scenarios, an XP Pro or Win2K Pro system configured as a DHCP client will autoconfigure the TCP/IP stack with an IP address from the IANA-reserved Class B network 169.254.0.0 with the subnet mask 255.255.0.0.

To determine whether your system has APIPA enabled, go to a command prompt and type

ipconfig /all
Then, locate Autoconfiguration Enabled in the output. If this parameter is set to yes, APIPA is enabled. If you have an IP address in the range 169.254.xxx.xxx, APIPA is active.

It is possible for XP to use APIA addresses with a static IP assignment due to its alternate IP Configuration feature; you can configure an interface that has more than one address. If you need to connect to more than one network (presumably from different locations), you can configure a second address (either static or APIPA) for the same interface. Alternate IP Configuration will allow your Windows XP Professional–based computer to look for the first address and, if that address is not available, to look for the second.

But in either instance the primary connection would have to be DHCP -- "obtain an IP address automaticly."

With a static IP on failure you would obtain an 0.0.0.0 IP address.