Cannot connect to Proxmox after changing ports on switch

[Aethelflaed]

Hello,
I'm new to Proxmox and have set it up on a Dell 7810. I've gone through the installation and configuration without a problem and can reach the server through the web GIU. When I move the server from my office to it's permanent home in the basement, it get plugged into a different port on the same switch. Same network nothing change except the physical move and port. From that time forward I can't reach the server at all. The network lights on the Dell show orange orange. Even if I move it back to the office and plug it into the same port still no connection. This has occurred in 2 re installations, I'm sure it's something simple but I'm just not seeing the problem. I've done a big of searching and haven't found anything that seems to be similar to my problem.

I welcome any suggestions.

 

[leesteken]

Did you configure a static IP address for Proxmox outside of the DHCP range of the router? Proxmox never refreshes the DHCP (that it might have gotten from the installer) since it assumes a static IP address. Maybe it expires on the router and/or the router does not accept the same address from multiple port?

 

[Aethelflaed]

Good idea!, I'm going to re-install and set that up. I'll let you know what happens.

 

[sw-omit]

Alternatively: If you plug in a PC/laptop in that network-cable in the basement that the proxmox-server is connected to, do you:
- Get an IP-adress
- Get internet-access
- Have a 1 gbps network-connection on the cable (orange lights usually mean less then 1000mbps/1gbps, and it can then be 100 or 10 and full or half duplex, although all of them SHOULD still allow (slow but possible) network.

 

[Aethelflaed]

I configured the router as you suggested Leesteken and with an assigned address the problem repeated. As you suggested sw-omit I Connected a laptop to the same cable I am using for the Proxmox box downstairs and it works perfectly. I'm back to no connection. this is even weirder as I have a couple of drops in my office so I powered off the machine, switched drops and powered on. It connected perfectly. As crazy as it sounds I'm starting to think it's a physical problem with the box that happens when I move it downstairs.

 

[Aethelflaed]

So I dug around in my parts bin and found a USB3 to 1GB Ethernet and reinstalled using that as the network port. It works perfectly in the basement now. This is a problem in the hardware or the configuration of the onboard NIC. I'm going to have to keep digging into it. I'll probably order a pci-e network adapter for a permanent solution.

Thanks for the suggestions and help, if anyone has an idea how to get the onboard NIC going I'll be happy to try a solution.