I was able to reproduce the symptoms and then fix the problem as described here:
https://bugzilla.redhat.com/show_bug.cgi?id=712315 Perhaps this applies to you too. That is, first make sure that you can set that route manually ip route add 1.2.3.0/24 via 10.0.0.5 dev eth0 metric 1 If you get RTNETLINK answers: Invalid argument then no route is added and NM also can't add that route. Can you confirm that the route you are trying to create can be set up using "ip route"? Please post the command you use and the text you enter into the applet. Even if it turns out that your problem was also incorrect route data, it's still a shortcoming in nm-applet that it doesn't inform the user. ** Bug watch added: Red Hat Bugzilla #712315 https://bugzilla.redhat.com/show_bug.cgi?id=712315 ** Changed in: network-manager (Ubuntu) Status: New => Incomplete ** Summary changed: - specified routes don't get set up + NM doesn't set specified route -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/943197 Title: NM doesn't set specified route Status in “network-manager” package in Ubuntu: Incomplete Bug description: Steps taken: * right click on tray icon, select "Edit Connections..." * in the "Wired" tab click "Auto eth0" then "Edit..." * click "IPv4 Settings" tab * click "Routes..." * add a route, e.g., 1.2.3.0 / 255.255.255.0 / 10.0.0.5 / 1 * Click OK, Save, Close * restart computer Result: * "route -n" doesn't show this route Expected: * "route -n" would now show the route we just set up ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: network-manager 0.9.1.90-0ubuntu5.1 ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17 Uname: Linux 3.0.0-16-generic x86_64 ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CRDA: Error: [Errno 2] No such file or directory Date: Wed Feb 29 11:34:17 2012 IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) IpRoute: default via 10.0.0.77 dev eth0 proto static 10.0.0.0/8 dev eth0 proto kernel scope link src 10.0.0.11 metric 1 169.254.0.0/16 dev eth0 scope link metric 1000 IwConfig: lo no wireless extensions. eth0 no wireless extensions. NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true ProcEnviron: LC_TIME=en_GB.utf8 LANGUAGE=en_GB:en PATH=(custom, user) LANG=en_GB.utf8 SHELL=/bin/bash RfKill: SourcePackage: network-manager UpgradeStatus: Upgraded to oneiric on 2011-10-14 (137 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/943197/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp