Re: Default-Routing problems

[Dan Williams <dcbw redhat com>]

On Sat, 2009-03-14 at 17:54 +0000, Colin Coombs wrote:
> My situation:
> 
> I have a laptop running Fedora Core 9 with all the updated versions of
> Network Manager etc. I have an internet connection with a 3G GSM USB
> dongle, which "Just Works", and that's fine. I also have a WiFi dongle
> which works fine when I'm near a base station.
> 
> I also have a printer attached to an intranet which I can access by a
> wired Ethernet port. My problem is that as soon as I plug in the
> Ethernet cable to the laptop, I lose my internet connection; more
> specifically the default route is reset from the GSM to the Ethernet,
> even though the wired intranet does not have any internet access. 

NM 0.7.1 fixes your problem; simply check the "Use this connection only
for resources on its network" box in the Routes dialog (see the
Routes... button in that connection's IP4 page), and NM will no longer
assign the default route to that connection.

If you want to use DHCP on a wired connection at some future point,
create a second wired connection, uncheck "Connect automatically", and
you can manually click on that wired connection from the applet whenever
you want to use your ethernet as the default route.

Dan