Network won't start on host after reboot

[luison]

We are setting up a local server with Proxmox VE 1.5. After correct installation and package upgrades, we started a migration of a physical Ubuntu 9.10 server which turned more or less successful.

After a reboot of the host Proxmox VE we have now lost completely the network which won't start:

# /etc/init.d/networking start
Reconfiguring network interfaces...SIOCSIFADDR: No such device
vmbr0: ERROR while getting interface flags: No such device
SIOCSIFNETMASK: No such device
SIOCSIFBRADDR: No such device
vmbr0: ERROR while getting interface flags: No such device
vmbr0: ERROR while getting interface flags: No such device
Failed to bring up vmbr0.
done.

Found on the forums some issues about deleting /etc/udev/rules.d/rules.d/75_persistent-net.rules and rebooting but no change.
Completely stack here... any help will be appreciated.

 

[dietmar]

After a reboot of the host Proxmox VE we have now lost completely the network which won't start:

Is that a standard installation using our installer? If so, what is the content of /etc/network/interfaces? Any hints in 'dmesg' - is the network card detected?

 

[luison]

Thanks for the reply.
Standart install as we finally managed to install via HW RAID of our Gigabyte motherboard, something which I didn't expect initially.
We must have "touched" the network config by some other means instead of web interface. After some effort we managed to restore from an original install.
Our problem was a missing bridge to eth0:

auto lo vmbr0
iface lo inet loopback

iface vmbr0 inet static
address 192.168.0.20
netmask 255.255.192.0
broadcast 192.168.0.255
network 192.168.0.0
gateway 192.168.0.1

Against correct:

auto lo
iface lo inet loopback

iface eth0 inet manual

iface eth1 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.0.20
netmask 255.255.192.0
gateway 192.168.1.11
bridge_ports eth0
bridge_stp off
bridge_fd 0

Strange thing was than even regenerating them via the web interface it never worked. I could suggest having some form of PVE script to restore network to default settings in case of wrong changes after changing network cards or upgrades.

Thanks agains for the response.

Jose Luis


P.D. For those with an interest the motherboard is the Gigabyte GA-790FXTA-UD5 via the 2 (white) gSata (sata3) connectors (Marvell Chipset) that was recognized by the Proxmox VE 1.5 installer with no issues. We still have to try to get any form of driver to check the RAID status running.