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Windows Forum / Windows Me / Networking / October 2005

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IP conflict

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Chris - 01 Oct 2005 22:36 GMT
I am running 3 pc LAN composed of ME,XP,'98 using linksys hard wired.  At
some point once in a while and now everytime I get the following message:
"Windows The system has detected a conflict for IP address.....101 with the
system having hardware address...... The interface has been disabled." 101
used to be the xp but I am now seeing it on ME. I don't know how the switch
occured. ME used to be 100 and now the XP is 101. Also the ME is the one as
the host and the rest are guest. Everything is fine except I get this message
now and it does not go away. Any thoughts will be appreciated.
Mike M - 01 Oct 2005 22:55 GMT
How are you allocating IP addresses?  Manually or automatically?  If you
are using a router it is probably easiest to use the DHCP server in the
router to allocate IP addresses and to configure each of the client PCs to
obtain an IP address automatically.  You can configure this on the
Properties sheet for the TCP/IP entry for the network card on each PC.
You can access this using Network in the Control Panel or right clicking
on Network Neighbourhood on the desktop and selecting Properties.
Highlight TCP/IP, click Properties, and on the IP Address tab check
"Obtain an IP address automatically".  Repeat for each PC.

If you need to have one IP use a fixed IP address ensure that the address
used is not in the range available to the DHCP server on the router.
Signature

Mike Maltby
mike.maltby@gmail.com

> I am running 3 pc LAN composed of ME,XP,'98 using linksys hard wired.
> At some point once in a while and now everytime I get the following
[quoted text clipped - 5 lines]
> rest are guest. Everything is fine except I get this message now and
> it does not go away. Any thoughts will be appreciated.
Chris - 01 Oct 2005 23:04 GMT
Mike, thanks for the kind reply! All the PCs are set to obtain IP
automatically. I don't know, at this point, how the IPs got switched between
the ME (mothership) and the XP.

> How are you allocating IP addresses?  Manually or automatically?  If you
> are using a router it is probably easiest to use the DHCP server in the
[quoted text clipped - 18 lines]
> > rest are guest. Everything is fine except I get this message now and
> > it does not go away. Any thoughts will be appreciated.
Chris - 02 Oct 2005 00:09 GMT
Mike, I turned off the cable modem. Unplugged the router. Turned off all the
PCs. Turned the modem back on, ME on, router on, and THEN the other PCs. The
correct IP was assigned to the ME and XP and no more message, thus far at
least. I hope it stays that way. Thanks for taking the time.

> Mike, thanks for the kind reply! All the PCs are set to obtain IP
> automatically. I don't know, at this point, how the IPs got switched between
[quoted text clipped - 22 lines]
> > > rest are guest. Everything is fine except I get this message now and
> > > it does not go away. Any thoughts will be appreciated.
Mike M - 02 Oct 2005 00:43 GMT
Thanks for posting back Chris and I'm pleased to see you've managed to
solve the problem.

It seems as if one of the PCs was caching its allocated IP address,
perhaps when turned off or otherwise disconnected from the LAN.  The DHCP
server on the router then allocated that address to another PC after which
the first PC decided to reconnect thus causing the IP address conflict.
Not being a network guy I don't know what that might have happened.
Perhaps Steve Winograd who posts here will explain,

Cheers,
Signature

Mike Maltby
mike.maltby@gmail.com

> Mike, I turned off the cable modem. Unplugged the router. Turned off
> all the PCs. Turned the modem back on, ME on, router on, and THEN the
> other PCs. The correct IP was assigned to the ME and XP and no more
> message, thus far at least. I hope it stays that way. Thanks for
> taking the time.
N. Miller - 02 Oct 2005 08:55 GMT
> I am running 3 pc LAN composed of ME,XP,'98 using linksys hard wired.  At
> some point once in a while and now everytime I get the following message:
> "Windows The system has detected a conflict for IP address.....101 with the
> system having hardware address...... The interface has been disabled." 101
> used to be the xp but I am now seeing it on ME. I don't know how the switch
> occured. ME used to be 100 and now the XP is 101.

*****Also the ME is the one as the host and the rest are guest.*****

> Everything is fine except I get this message
> now and it does not go away. Any thoughts will be appreciated.

Then later, on Sat, 1 Oct 2005 16:09:03 -0700, Chris wrote again,
in message <8E6FC259-B062-4525-8D62-AD01662FBEBF@microsoft.com>:

> Mike, I turned off the cable modem.

*****Unplugged the router.*****
> Turned off all the PCs. Turned the modem back on, ME on, router on, and
> THEN the other PCs. The correct IP was assigned to the ME and XP and no
> more message, thus far at least. I hope it stays that way. Thanks for
> taking the time.

Now I am confused. There is no way that the Windows ME computer, or any
computer on a LAN with a router device, should be hosting an Internet
connection. It you are connecting to a cable modem through a router, you
should not be running ICS; and, without ICS, the Windows ME is just one
peer on the LAN, not a host.

(Actually, in an ICS network, the ICS device is not the "host", but the
"gateway"; in a LAN behind a router, the router is the "gateway".)

Signature

Norman
~Win dain a lotica, En vai tu ri, Si lo ta
~Fin dein a loluca, En dragu a sei lain
~Vi fa-ru les shutai am, En riga-lint

Mike M - 02 Oct 2005 11:00 GMT
Norman,

Where exactly does the OP say he is running ICS?  As far as I can see he
makes no reference to ICS so why complicate matters?
Signature

Mike Maltby
mike.maltby@gmail.com

>> I am running 3 pc LAN composed of ME,XP,'98 using linksys hard
>> wired.  At some point once in a while and now everytime I get the
[quoted text clipped - 28 lines]
> (Actually, in an ICS network, the ICS device is not the "host", but
> the "gateway"; in a LAN behind a router, the router is the "gateway".)
N. Miller - 02 Oct 2005 17:36 GMT
<snip>

>>> *****Also the ME is the one as the host and the rest are guest.*****

<snip>

> Norman,
>
> Where exactly does the OP say he is running ICS?

He doesn't say it explicitly, but...

> As far as I can see he makes no reference to ICS so why complicate
> matters?

Matters were already complicated by using terminology which I found
confusing. Or can you explain that quote I left intact after much snipage?
Please explain it in the context of a Peer-to-Peer network? Which is what I
assume he is posting about.

Signature

Norman
~Win dain a lotica, En vai tu ri, Si lo ta
~Fin dein a loluca, En dragu a sei lain
~Vi fa-ru les shutai am, En riga-lint

Mike M - 02 Oct 2005 18:13 GMT
Please try reading Chris's original post again as it is patently obvious
that ICS is not being used.
Signature

Mike Maltby
mike.maltby@gmail.com

>> Where exactly does the OP say he is running ICS?
>
[quoted text clipped - 7 lines]
> snipage? Please explain it in the context of a Peer-to-Peer network?
> Which is what I assume he is posting about.
N. Miller - 03 Oct 2005 09:25 GMT
> Please try reading Chris's original post again as it is patently obvious
> that ICS is not being used.

Just because he mentions the Linksys? People have been known to try to run
ICS *and* a router together before.

Signature

Norman
~Win dain a lotica, En vai tu ri, Si lo ta
~Fin dein a loluca, En dragu a sei lain
~Vi fa-ru les shutai am, En riga-lint

Chris - 02 Oct 2005 13:06 GMT
Hi Norman, I am not running ICS. Simply a LAN to share printer, file and
folders. Thank you for the comment.

> > I am running 3 pc LAN composed of ME,XP,'98 using linksys hard wired.  At
> > some point once in a while and now everytime I get the following message:
[quoted text clipped - 27 lines]
> (Actually, in an ICS network, the ICS device is not the "host", but the
> "gateway"; in a LAN behind a router, the router is the "gateway".)
N. Miller - 02 Oct 2005 17:38 GMT
> Hi Norman, I am not running ICS. Simply a LAN to share printer, file and
> folders. Thank you for the comment.

Well, I suppose the computer connected printer can make that computer a
"host"; but, generally, when I think of a peer-to-peer network, I don't
think of "hosts" and "guests".

Signature

Norman
~Win dain a lotica, En vai tu ri, Si lo ta
~Fin dein a loluca, En dragu a sei lain
~Vi fa-ru les shutai am, En riga-lint

Chris - 07 Oct 2005 00:09 GMT
Norman thanks for taking the time. I have to admit that my description of the
PC events are always unconventional due to the fact that I am simply self
taught. You are absolutely right that by host I meant connected to the
printer and stuff.

> > Hi Norman, I am not running ICS. Simply a LAN to share printer, file and
> > folders. Thank you for the comment.
>
> Well, I suppose the computer connected printer can make that computer a
> "host"; but, generally, when I think of a peer-to-peer network, I don't
> think of "hosts" and "guests".
 
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