You have been subscribed to a public bug: 1) The version and edition of Linux Mint you are using (if you are not sure, open a terminal and run "mintwelcome").
Release: 1 (debian) Edition: Debian 64-bit 2) What you did for the problem to happen, and how to reproduce it. In NetworkManager, I configured both wired and wireless network interfaces to connect to the same network. I set both interfaces to "Off" in NetworkManager. I then turned on and connected the wireless interface. After the wireless interface was connected, I turned on and connected the wired interface. 3) What happened. When only the wireless network was connected, both the local subnet route and default route went over the wireless connect, the only one available. Upon connection of the wired interface, NetworkManager properly prioritizes the wired interface for the default route, but left the wireless network prioritized for the local subnet route. Here is an example of the improper routing table, notice that the route for wlan0 appears above the route for eth0: default via 192.168.77.254 dev eth0 proto static 192.168.77.0/24 dev wlan0 proto kernel scope link src 192.168.77.41 192.168.77.0/24 dev eth0 proto kernel scope link src 192.168.77.40 This is due to the order of the routes in the routing table that results from the order that the network connects were enabled. If the order of connection is reversed, so are the local subnet routes, correcting the issue. 4) What you expected to happen instead. I expected the wired network to be prioritized for both the default route and local subnet route, producing a routing table something like this: default via 192.168.77.254 dev eth0 proto static 192.168.77.0/24 dev wlan0 proto kernel scope link src 192.168.77.41 metric 1 192.168.77.0/24 dev eth0 proto kernel scope link src 192.168.77.40 metric 0 5) If the problem happened once, sometimes, or always. This problem always happens. At some point in the past the network routes were handled properly, producing a routing table that looked like this: default via 192.168.77.254 dev wlan0 proto static metric 1 default via 192.168.77.254 dev eth0 proto static metric 0 192.168.77.0/24 dev wlan0 proto kernel scope link src 192.168.77.41 metric 1 192.168.77.0/24 dev eth0 proto kernel scope link src 192.168.77.40 metric 0 6) Possible relevant reference. I found a NetworkManager a couple of bugs about this issue that indicates this is a problem with libnl3. Here is the NetworkManager bug report: https://bugzilla.gnome.org/show_bug.cgi?id=659983 https://bugzilla.gnome.org/show_bug.cgi?id=659984 The second NetworkManager bug (659984) references a libnl mailing list message indicating a fix to the issue. Here is that post: http://lists.infradead.org/pipermail/libnl/2011-October/000360.html ** Affects: linuxmint Importance: Undecided Status: New ** Affects: network-manager (Ubuntu) Importance: Undecided Status: New ** Affects: debian Importance: Undecided Status: New ** Affects: fedora Importance: Unknown Status: Unknown -- NetworkManager mishandles multiple interfaces on same subnet https://bugs.launchpad.net/bugs/1012211 You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
