Public bug reported: My interfaces on some state changes seems to reset the MTU to 1280 after connecting to Wifi, new interface, or around every 10 minutes on VPN.
Seems to be an upstream bug with network-manager that wasn't fixed before release of 15.10 http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=a92d8b0c678e17d1cc175c3aad50afb1443785d2 http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=c44069c10a4a9c696910baf0dbbefc41528f6dbe http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=e0fa48f224abcb73a1a129f10050f7cd942ee629 All seem to be related. This is a major bug. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: network-manager 1.0.4-0ubuntu5 ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3 Uname: Linux 4.2.0-16-generic x86_64 ApportVersion: 2.19.1-0ubuntu4 Architecture: amd64 CurrentDesktop: Unity Date: Mon Nov 2 22:15:13 2015 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback InstallationDate: Installed on 2015-10-31 (2 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) IpRoute: default dev vpn0 proto static scope link metric 50 default via 192.168.1.1 dev wlp4s0 proto static metric 600 169.254.0.0/16 dev vpn0 scope link metric 1000 172.26.96.0/20 dev vpn0 proto kernel scope link src 172.26.108.224 metric 50 192.168.1.0/24 dev wlp4s0 proto kernel scope link src 192.168.1.246 metric 600 NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) modified.conffile..etc.NetworkManager.NetworkManager.conf: [modified] mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2015-11-02T00:33:31.364599 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 wily -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1512576 Title: MTU is reset to 1280 often To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1512576/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
