[SOLVED] No network connectivity after Fresh Proxmox 7 install

[Razva]

We tried to convey it quite explicitly in the upgrade how-to, and that how-to is heavily recommend getting read and followed closely before and during upgrade, to avoid as many pitfalls on the way.
But we'll see if we can further improve this, possibly adding a hint to the pve6to7 checker script.

Please note that we are talking about installing a new server, not a migration from 6 to 7.

I think that it would be a VERY helpful and good idea for the Proxmox install script to just clone the physical NIC's MAC on the bridge interface, when doing the initial install/setup.

Or maybe add a bolded text phrase on the install UI -> Network setup page, where is mentioned that one should clone the NIC's MAC address to the bridge interface after installation if there's no network connectivity.

This will help Proxmox avoid a ton of future topics (like mine) from users that are MAC-restricted by their ISP (which is basically 90% of ISPs I guess?).

 

[Razva]

I can confirm that cloning the physical NIC's MAC address to the Proxmox Bridge solved the issue. Thank you @t.lamprecht for your support!

 

[Razva]

Hi,

I had PVE 7.0.4 beta installed (at Hetzner). Everything worked there --> after I added the MAC address from ens3 to the bridge. I just updated to 7.0.10. After the update the MAC address of VMBR0 has changed. I can´t change the MAC address with ifreload -a or ifdown vmbr0; ifup vmbr0. I get the error "error: netlink: vmbr0: cannot address 193.xx.xxx.xxx/24 dev vmbr0: arguent of type IPNETWORK is not iterable.

How did you installed the Beta? For future installs, I highly recommend you to install via ISO, not via Hetzner's "automated installs" (you can ask Hetzner for KVM + a USB stick with Proxmox 7).

Regarding your network config, it's a bit messed up. Here's a simple example that will work:

auto lo
iface lo inet loopback
# Loopback

iface enp7s0 inet manual
auto vmbr0
iface vmbr0 inet static
        address 162.XXX.100.XXX/26
        hwaddress 7c:10:XX:1d:52:XX
        gateway 162.XXX.100.XXX
        bridge-ports enp7s0
        bridge-stp off
        bridge-fd 0
#Proxmox - Default

This is enough. Change the NIC name, IP address etc and reboot. Don't add anything else. If something goes wrong get back with a reply to this thread.

 

[khampol]

My issue is
1 - Install clean with proxmox-ve_7.0-1 ISO
2 - All fine here so I just update and reboot
3 - After reboot NO network at all.
.........
Promox do we have any update planned for ISO 7.x install for clean and normal in near future please ?

 

[t.lamprecht]

My issue is
1 - Install clean with proxmox-ve_7.0-1 ISO
2 - All fine here so I just update and reboot
3 - After reboot NO network at all.
.........
Promox do we have any update planned for ISO 7.x install for clean and normal in near future please ?

A new ISO release (proxmox-ve_7.0-2.iso) was uploaded recently.
It includes a newer ifupdown2 package with a policy configured by us to ensure the MAC address is bound to the first slave-port, similar in effect compared to how our older, not circumvented, kernel patch worked.

 

[khampol]

A new ISO release (proxmox-ve_7.0-2.iso) was uploaded recently.
It includes a newer ifupdown2 package with a policy configured by us to ensure the MAC address is bound to the first slave-port, similar in effect compared to how our older, not circumvented, kernel patch worked.

Great I think i was just be in few minutes ago. I ll try for sure. Thanks!

Updated on 07 September 2021