System assigning bogus ip address?

[Emmett]

Small business with about six pcs, cisco switch and dsl.
All pc's network adaptor set to "obtain an ip address
automatically". All pcs have been working fine- can
access internet, "see" each other in "view network",
etc. One pc lost internet connection and ability to see
or be seen by other pcs. Can't ping anyone else or be
pinged from another pc. Run ipconfig and the address
169.254.29.95 comes up. All other pcs have address
starting with 168. as does the dsl router. I deleted the
adaptor and uninstalled network services (in add remove
windows components and ran repair on 2000 disk. Rebooted
and got good ip address (168. range) and things worked
for awhile, then back to problem. I removed adaptor and
network services again, but still have problemn. I
believe a "bug" or adware program has caused dhcp to set
the ip address 169.254.29.95. Ran spybot search and
destroy, found a couple of problems but still can't cure
issue. A search in registry had several occurances of
that IP address. Tried modifing key by removing address
in key, but they come back on reboot. Any sugesstions?
Can email by taking bogus out of address.

Thanks in advance

 

[Enkidu]

Small business with about six pcs, cisco switch and dsl.
All pc's network adaptor set to "obtain an ip address
automatically". All pcs have been working fine- can
access internet, "see" each other in "view network",
etc. One pc lost internet connection and ability to see
or be seen by other pcs. Can't ping anyone else or be
pinged from another pc. Run ipconfig and the address
169.254.29.95 comes up. All other pcs have address
starting with 168. as does the dsl router. I deleted the
adaptor and uninstalled network services (in add remove
windows components and ran repair on 2000 disk. Rebooted
and got good ip address (168. range) and things worked
for awhile, then back to problem. I removed adaptor and
network services again, but still have problemn. I
believe a "bug" or adware program has caused dhcp to set
the ip address 169.254.29.95. Ran spybot search and
destroy, found a couple of problems but still can't cure
issue. A search in registry had several occurances of
that IP address. Tried modifing key by removing address
in key, but they come back on reboot. Any sugesstions?
Can email by taking bogus out of address.

Those addresses are assigned by the system when a static address has
not been assigned and it cannot contact a DHCP server. It is more
likely that you have a hardware problem than you have bug or virus.

Try setting the address statically in the adapter to an address on
your subnet. If you still have problems I suggest you try:

a) a new cable
b) a new network card
c) a different port on the switch/router.

HTH

Cheers,

Cliff

 

[Emmett]

Do you mean 169.254.29.95 specifically is a default
address for Windows 2000? also, have tried a, b and c -
will try another card again tomorrow. Tried a linksys
card today but did not work. If I disable onboard intel
adaptor, do I have to do anything other than reboot, as
in modify or delete the existing key in registry?

 

[Pegasus \(MVP\)]

A simple way to resolve the problem goes like this:
- Find out the IP address of your DHCP server.
- Assign a fixed IP address to your the problem PC,
e.g. 192.168.0.10.
- Ping the IP address of the DHCP server. Ping
other addresses too!

When finished, put the problem PC back on DHCP.

 

[Enkidu]

Firstly, I would consider fiddling with the registry as a LAST resort.

Secondly, yes, the 169..... addresses are a default address in Windows
2000 - if a fixed address is not assigned and it cannot get an address
via DHCP.

Try assigned a static address and let us know if it works. The dsl
router is probably assigning the addresses. Pick one in the dsl
router's address range that is NOT being used by another machine.

Disabling/enabling the adaptor is not (probably) going to get you
anywhere. If you are coming up with the APIPA address, that means that
you have connectivity problems.

See this reference. It is for XP but applies to 2000 too:
http://www.microsoft.com/windowsxp/...ng/productdoc/en/sag_tcpip_pro_autoconfig.asp

Cheers,

Cliff