Network problem 2nd card


New Member
Mar 2, 2019
Hi all.
I have a fresh install of proxmox 6 on a new server.
I have an asus p10S-M WS with 2 inetwork card on the motherboard (Intel® I210, 2 x Contrôleur Gigabit LAN)

On the network tab the first is name em3
And the 2nd "rename3" with unknow device.
I can't use the 2nd card. I have change on the /et/network/interface by eth0. The 2nd card call now network card. But it's deplay not active on the web interface.

I don't understand what's happen.
can you help me to active this second network card ?

Please make sure to install all available updates for your systems firmware (BIOS/NIC-firmware if applicable/CPU-microcode) since those issue sometimes resolve themselves with the newest firmware.

Please also install all available updates on your PVE-node

If this does not help - check `dmesg` and `journalctl -b` (after booting) - that should explain where the problem comes from

I hope this helps!
problem Solved.
For test i have install a fresh debian 10. Problem of the second network appear too.
i found the solution. I past my /etc/network/interfaces.

First you need to be sure of the name of network card :

ls /sys/class/net/

For my case rename 3

After edit your conf interfaces.

I add allow-hotplug for each network device with the good name with the previous command.

auto lo
iface lo inet loopback
allow-hotplug eno1
iface eno1 inet manual
auto vmbr0
iface vmbr0 inet static
bridge-ports eno1
bridge-stp off
bridge-fd 0

allow-hotplug rename3
iface rename3 inet dhcp

auto vmbr1
iface vmbr1 inet manual
bridge-ports rename3
bridge-stp off
bridge-fd 0
hmm - still the 'renameX' is a indicator that something does not quite work out with udev - I would suggest checking the logs
Also running dhcp on a bridge-port (the physical nic) is not really supported

I hope this helps!


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