How to reconnect an ethernet connection

The LED on the PC's NIC or the link status returned by the Ethernet driver (up-down, 10-100, half-full). There's a utility you can use to look at the link status (not all drivers return link status, but most do). I can't remember the name of it. I doubt that the link layer is the problem if the same move works for Windows machines.

Are you using static IP addresses or DHCP?

If you're using DHCP, it could be that the two ports are on different subnets. If moving Windows machines between the two locations does work, look to see what the PC's IP address and netmask is before and after the move.

If you're moving between subnets, then you've got to tell the dhcp client to request a new address when you get to the new port. It could be that Windows does this automatically when the link status goes down-up. I don't think most Linux setups do.

My first guess: you're using DHCP, and the two ports are on different subnets and therefore require different IP addresses and-or subnet masks. Windows must be requesting a new address via DHCP when it detects the link status change, and Linux must not be. I don't know if there's a way to configure Linux to request a new DHCP lease when the link status goes down and then up.

Again, this is just a semi-educated guess.

If you're using static IP addresses, and it works for Windows and not for Linux, then I'm stumped.

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