No network after restarting debian-networking

M

maxvb

New Member
Oct 8, 2011
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Hi!

I set up the VM-network by using this tutorial: http://wiki.hetzner.de/index.php/KVM_mit_Nutzung_aller_IPs_aus_Subnetz (Translation: http://translate.google.com/transla...ller_IPs_aus_Subnetz&sl=de&tl=en&hl=&ie=UTF-8)

But there is an Problem when restarting the network (/etc/init.d/networking restart): No VM (KVM and OpenVZ) is still connectet to the internet. After rebooting the VMs the problem is gone.

How can I fix this problem without rebooting each VM?

I hope you understand my english (I'm from Germany) and I hope you can help me.

Thanks in advance!

Max
 
Hi macday!

Thx for your answer.

I tried typing ifdown vmbr2 and ifup vmbr2 but it still not works... I had to reboot the VMs agin.

/etc/init.d/networking restart shows some warnings, but I think they're not important.

Code: 
hugo:/opt# /etc/init.d/networking restart
Reconfiguring network interfaces...RTNETLINK answers: No such process
if-up.d/mountnfs[eth0]: waiting for interface vmbr0 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr1 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr2 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr3 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr4 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr5 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr6 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr7 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr8 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr9 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr10 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr11 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr12 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr13 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr0 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr1 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr2 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr3 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr4 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr5 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr6 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr7 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr8 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr9 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr10 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr11 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr12 before doing NFS mounts (warning).
if-up.d/mountnfs[eth0]: waiting for interface vmbr13 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr1 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr2 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr3 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr4 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr5 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr6 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr7 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr8 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr9 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr10 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr11 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr12 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr0]: waiting for interface vmbr13 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr2 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr3 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr4 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr5 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr6 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr7 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr8 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr9 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr10 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr11 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr12 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr1]: waiting for interface vmbr13 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr2]: waiting for interface vmbr3 before doing NFS mounts (warning).
if-up.d/mountnfs[vmbr2]: waiting for interface vmbr4 before doing NFS mounts (warning).
[and so on]
done.
hugo:/opt# ifdown vmbr2
hugo:/opt# ifup vmbr2
hugo:/opt# ping xxx.xxx.xxx.131
PING xxx.xxx.xxx.131 (xxx.xxx.xxx.131) 56(84) bytes of data.
From 10.10.2.1 icmp_seq=1 Destination Host Unreachable
^C
--- xxx.xxx.xxx.131 ping statistics ---
2 packets transmitted, 0 received, +1 errors, 100% packet loss, time 999ms

What's wrong with it?
 
Last edited:
Just for information : we have the same problem with Proxmox VE 3.0

after /etc/init.d/networking restart

the VM (Linux 2.6, Win 2k8, Win 2k12) cannot be reached anymork (network unreachable)

... does somebody have any clues about such a problem ?
 
Hi jbennet,

I have found a solution for this.

I have removed the bridge when the network interface shuts down. So all interfaces were removed from the bridge. I had to manually add the vm interface to the bridge again to enable the network again. See: $ bridgectl --help
 
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