There is an IP address conflict...? Well, no...

[Kenneth]

Howdy,

I have a new XP Pro laptop that is giving me an error that I
cannot interpret.

The system has both an integrated wired network card, and an
integrated wireless card.

When in my home, I connect to our 6 system LAN via wireless,
and that works fine.

When in my office, I plug in a cable, and turn off the
wireless so that I connect via cable only.

Now, for some reason, I am getting the error "There is an IP
address conflict with another system on the network."

But here's the hitch:

I ran IPconfig on this system and it shows what would appear
to be a proper address.

Then, if I ping all the other systems on our LAN (and there
are only five others) then all display properly, and with
unique IP addresses.

So, I am baffled.

I would welcome any help on this odd situation.

Sincere thanks,

 

[Kenneth]

Howdy,

I have a new XP Pro laptop that is giving me an error that I
cannot interpret.

The system has both an integrated wired network card, and an
integrated wireless card.

When in my home, I connect to our 6 system LAN via wireless,
and that works fine.

When in my office, I plug in a cable, and turn off the
wireless so that I connect via cable only.

Now, for some reason, I am getting the error "There is an IP
address conflict with another system on the network."

But here's the hitch:

I ran IPconfig on this system and it shows what would appear
to be a proper address.

Then, if I ping all the other systems on our LAN (and there
are only five others) then all display properly, and with
unique IP addresses.

So, I am baffled.

I would welcome any help on this odd situation.

Sincere thanks,

Hello again,

I continued to look into this and found that there were two
TCP/IP entries in the NIC's properties.

One was listed as Microsoft TCP/IP Version 6, and the other
as just TCP/IP.

Am I correct to assume that I want one, or the other, but
not both?

Thanks again,

 

[Guest]

It's unlikely that the IPv6 address is used. Possible, but not likely.

There is probably another machine with the same (standard) IP address. You
won't be able to ping this machine. Options are either to find it manually or
(easier) to seelct another IP address yourself.

 

[Kenneth]

It's unlikely that the IPv6 address is used. Possible, but not likely.

There is probably another machine with the same (standard) IP address. You
won't be able to ping this machine. Options are either to find it manually or
(easier) to seelct another IP address yourself.

Hi Ian,

Thanks for your comments. Indeed, I have solved the problem
by giving this box a static IP address, but there is still
something confusing about the situation:

You said "you won't be able to ping this machine" (that is
the one with the conflicting address) and, of course, that
makes sense, but I know all of our systems (we only have
six) and I was able to ping every one successfully. I pinged
them by name, and when I did, each replied, and displayed
its IP address properly. Each of those addresses was unique,
and none the same as the machine that displayed the error.

So, in the sense of being a "problem" the matter is
resolved, but the mystery remains.

Do you have any further insight about why I might be getting
the error?

Thanks again,

 

[Buck Rogers]

On Sun, 18 Dec 2005 23:23:03 -0800, Ian

Hi Ian,

Thanks for your comments. Indeed, I have solved the problem
by giving this box a static IP address, but there is still
something confusing about the situation:

You said "you won't be able to ping this machine" (that is
the one with the conflicting address) and, of course, that
makes sense, but I know all of our systems (we only have
six) and I was able to ping every one successfully. I pinged
them by name, and when I did, each replied, and displayed
its IP address properly. Each of those addresses was unique,
and none the same as the machine that displayed the error.

So, in the sense of being a "problem" the matter is
resolved, but the mystery remains.

Do you have any further insight about why I might be getting
the error?

Thanks again,

Hello,

Do you have any networked peripherals (printers, fax server) that
might capture the IP address in question?

HTH YMMV

Buck