Internet connection problems

I've plugged into my laptop the LAN cable from my desktop computer and the
Internet connection works for a few seconds, then in Vista becomes Local
Access Only, then drops...then works again for a little bit and so on.
From my laptop, I can't ping the default gateway ( router's interface ).
I've set up the same IP information , hostname & MAC address as on the
desktop computer on the laptop, but it doesn't work.
A possible solution?

The router is under ISP's administration.

Post back the results of both computers ipconfig /all may help.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
"Mircea Neagoe" <MirceaNeagoe@discussions.microsoft.com> wrote in message news:2B735B65-740F-4C94-BAE0-3C58A0190492@microsoft.com...
I've plugged into my laptop the LAN cable from my desktop computer and the
Internet connection works for a few seconds, then in Vista becomes Local
Access Only, then drops...then works again for a little bit and so on.
From my laptop, I can't ping the default gateway ( router's interface ).
I've set up the same IP information , hostname & MAC address as on the
desktop computer on the laptop, but it doesn't work.
A possible solution?

The router is under ISP's administration.

On the laptop, Ipconfig reports NIC's real MAC address, not the spoofed
one...after configuring it in device manager ( network address attribute in
NIC properties ) and rebooting.

"Mircea Neagoe" wrote:

> I've plugged into my laptop the LAN cable from my desktop computer and the
> Internet connection works for a few seconds, then in Vista becomes Local
> Access Only, then drops...then works again for a little bit and so on.
> From my laptop, I can't ping the default gateway ( router's interface ).
> I've set up the same IP information , hostname & MAC address as on the
> desktop computer on the laptop, but it doesn't work.
> A possible solution?
>
> The router is under ISP's administration.