Public bug reported:
With Vivid, having two connections to the same network subnet is
unstable due to missing metrics for local networks.
Example:
Being connected to 192.168.1.0/24 via both wired and wireless will cause
connectivity issues as sent packets hop between the two interfaces.
It used to be that this wasn't an issue. I would go between work and
home and plug in and my machine would automatically connect to wireless
and it would use the lower metric ethernet interface for all
communications, while the wlan interface would remain connected but
unused.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: network-manager 0.9.10.0-4ubuntu11
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.16.2-0ubuntu4
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Mar 25 09:17:27 2015
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2015-01-25 (58 days ago)
InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: network-manager
UpgradeStatus: Upgraded to vivid on 2015-03-17 (8 days ago)
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2:
Error: Object 'nm' is unknown, try 'nmcli help'.
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug vivid
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https://bugs.launchpad.net/bugs/1436330
Title:
Network Manager doesn't set metric for local networks any more,
causing connection issues
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