[SOLVED] No network connection

[wheelie55]

This is my first time trying proxmox.
I'm having some trouble getting my server to connect to my network. I have installed the latest version of proxmox from a USB following the wiki. Essentially the problem is that the box thinks it's not connected to anything. DHCP does not work and manually assigning an IP also does not work. Ping on the internal network and the external internet do not get resolved (destination host unreachable ). I have included a screenshot of the command

ip addr

.
What i have tried:
- change cable
- change nic (the motherboard has two onboard 10 Gb nics)
- change port on the switch
- change switch
- try another operating system (with freenas it works perfectly)
- google

Any suggestions?

 

[aaron]

can you show your network config?
cat /etc/network/interfaces

 

[wheelie55]

Hey aaron thanks for the reply.
Here you go.
It appears like they are not showing up? could it be a driver issue?

 

[aaron]

The vmbr0 is configured to use eno4 as it's physical interface. According to the ip addr output from before, you had the cable plugged in to eno3. Try switching the cable back to the other NIC and reboot. If you run ip addr then, you should see eno3 with the NO-CARRIER and en04 and vmbr0 without it.

 

[wheelie55]

thanks it worked flawlessly!

 

[George Michalopoulos]

i had the same problem, with a compaq microserver, after i added a usb3 mini pci card.
it changed ethernet from enp2s0 to enp3s0