Public bug reported:
I have set up a small LAN in our office. The LAN uses a switch to
connect computers, some of them Ubuntu desktops/laptops, with each other
to share files and printers.
The LAN switch is connected to a broadband router which acts as a
gateway to the internet for all machines connected to the LAN. So it is
possible in normal situations for computers on the LAN to connect to
each other *and* the internet without any problems.
Additionally, these Ubuntu desktops/laptops are also configured to
connect to the internet using a broadband USB modem when necessary. This
option is used in one of two situations:
1. If the laptop is out of office and therefore not connected to the LAN
2. If the broadband router collapses due to some technical snag and is unable
to offer any internet services.
It is situation 2 that I am bothered about. In this situation Network
Manager offers us the possibility of working either on the LAN or on the
internet via the USB modem but not both. So if you want to surf the web,
you have to disconnect from the LAN. If you want to use the LAN
resources you have to disconnect the USB modem.
This should not happen. I have installed wvdial and gnome-ppp on the
machines. By setting the defaultroute and replacedefaultroute options in
/etc/ppp/peers/wvdial-pipe and /etc/ppp/peers/wvdial and not setting any
DNS entry in the eth0 configuration, I am able to access both the LAN
resources and the internet. This is the way it should be.
In my view, Network Manager (or Modem Manager) is unable to replace the
default route when it connects. In my experience, this has been a long
standing problem in various Ubuntu releases ever since Network Manager
took over the network resources in lieu of /etc/networking/interfaces.
So my suggestion is that Ubuntu should use wvdial/gnome-ppp, take the
pain away from setting setuid permissions from wvdial and configure it
to replace the default route at the time of installation. Network
Manager could simply be a wrapper around wvdial to do this instead of
trying unsuccessfully to reinvent the wheel.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu14
Architecture: amd64
CRDA: Error: [Errno 2] No such file or directory
Date: Mon Oct 29 12:30:07 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
IpRoute:
default via 220.224.141.129 dev ppp0 proto static
220.224.141.129 dev ppp0 proto kernel scope link src 115.240.105.143
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=false
WWANEnabled=true
WimaxEnabled=true
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.NetworkManager.NetworkManager.conf:
2012-06-16T13:13:51.230640
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
ttyUSB0 cdma connected
/org/freedesktop/NetworkManager/Devices/2
eth1 802-11-wireless unavailable
/org/freedesktop/NetworkManager/Devices/1
eth0 802-3-ethernet disconnected
/org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI
WWAN-HARDWARE WWAN
running 0.9.4.0 connected enabled enabled
disabled enabled enabled
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise running-unity
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1072578
Title:
Network Manager: eth0 and ppp0 together do not work
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1072578/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
