Networking problems after Proxmox clean installation

BrendonB

Member
Jan 7, 2022
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I recently bought a new machine to run proxmox after a previous motherboard crashed
My first problem started when proxmox would not detect the onboard NIC to start the installation. This is related to the intel v129 network interface having some checksum issue which can only be fixed by patching the kernel which i think is out of my depth.

I then tried to use USB to ethernet adapter I had. This picked up correctly during the installation and received an IP etc.

The problem comes in after installation where there is no connectivity to or from proxmox.

I did a "systemctl status networking" and the error shows as:
SQL:
Starting Raise Network interfaces...
interface enx6c198fb17204 does not exist!
Waiting for vmbr0 to get ready...

In the later version of proxmox is shows that the vmbr0 interface did not start due to bridge port enx6c198fb17204 not being up (I tried 2 different versions of install)

No "enx6c198fb17204" is the name proxmox gave to the USB to ethernet interface during the installation.

if i do "vi /etc/network/interfaces" I see the following:

Code:
auto lo
iface lo inet loopback

iface enx6c198fb17204 inet manual

auto vmbr0
iface vmbr0 inet static
    address 192.168.0.50/24
    gateway 192.168.0.1
    bridge-ports enx6c198fb17204
    bridge-stp off
    bridge-fd 0

if I do "dmesg | grep eth" or "dmesg | grep enx" (for the name of the interface) both return no results.

if I do "ip a" it only shows the lo and vmbr0 interfaces but nothing for the enx6c198fb17204 interface

I have read some of the forum referring to the interfaces being renamed but I dont see any evidence of that
The USB ethernet device is still present if i do "lsusb" (It is a D-Link DUB-E1000) and i have actually tested another USB ethernet device with the exact same results (albeit different interface name)

I am completely stumped and would really appreciate any assistance. I cant even go and put a PCI ethernet card into the device as it has no PCI slots :(
 
Hi,
you can try to unplug the USB NIC and while running dmesg -w plug it back in. What do you get as output, maybe post dmesg | tail -n 20 after plugging the USB NIC in.
Also post the output of lsusb -s <bus>:<devnum> after pluging the USB NIC in, use the bus and device number you get from lsusb.
 

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