NetworkManager doesn't support bridge interface defined in /etc/network/interfaces

Bug #1013963 reported by Laurent Dinclaux on 2012-06-16
This bug affects 18 people
Affects Status Importance Assigned to Milestone
network-manager (Ubuntu)

Bug Description


I need a network bridge for my virtualbox VMs on my desktop computer. If I create a br0 bridge in /etc/network/interfaces, it works but Network Manager applet doesn't see any active network connection, and as such I can't connect to VPN anymore.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager-gnome
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Date: Sat Jun 16 14:27:24 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120316)
 PATH=(custom, user)

SourcePackage: network-manager-applet
UpgradeStatus: No upgrade log present (probably fresh install)
 eth1 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/1
 eth0 802-3-ethernet connected /org/freedesktop/NetworkManager/Devices/0
 running connected enabled enabled enabled enabled disabled

Laurent Dinclaux (dreadlox) wrote :
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in network-manager-applet (Ubuntu):
status: New → Confirmed
Thomas Hood (jdthood) on 2012-10-30
affects: network-manager-applet (Ubuntu) → network-manager (Ubuntu)
summary: - Network manager doesn't support bridge interface
+ NetworkManager doesn't support bridge interface defined in
+ /etc/network/interfaces
Klaus Bielke (k-bielke) wrote :

I get this behavior when I use a bridge or an ordinary wired ethernet (eth0) for network connection iff this interface is not managed by NetworkManager but defined in /etc/network/interfaces.

Problem is (at least to my experience) that NetworkManager cannot open an VPN over a working connection that it does not manage itself.

Feature requests:
1. NetworkManager should search for and report properties of ALL network connections, even these not managed by itself. Working connections not managed by NetworkManager should marked like 'not managed by NM'.

2. NetworkManager should be able to use every working connection as basis for a VPN.
I am using ubuntu 12.04 LTS i386 32bit and NM from package

Reuben Lifshay (computator) wrote :

Network Manager in Fedora and possibly upstream as well supports bridges properly. This should be added to Ubuntu's Network manager or pulled from upstream.

Reuben Lifshay (computator) wrote :

After more research it appears that this has indeed been fixed as of NM 0.9.8 which is included in Raring or later.

I have ubuntu 13.10 with network-manager and still experience the problem.

Any workaround available ?

Tom (doubek-tomas) wrote :

Ubuntu 13.10 Still same problem with bridge and network manager

gorilych (gorilych) wrote :

Ubuntu 14.04 - the issue is the same.

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