Re: Mobile broadband and carriers

[Dan Williams <dcbw redhat com>]

On Tue, 2009-01-20 at 09:12 +0100, Marc Luethi wrote:
> On Mon, 2009-01-19 at 19:47 +0200, Janne Boman wrote:
> 
> > Nothing gets written to that file when I plug in the phone. The applet
> > goes trough the set up dialogs, an option to select my carrier appears
> > on the list of available networks, but when I select the mobile carrier
> > the connection returns to use the wireless network (or whatever I was
> > using at that time...). It's kinda weird, the last log entry is dated
> > about 7 hours ago, there's nothing on my current session (a power of in
> > the middle).
> 
> Try disabling Wireless globally in NM before starting the Mobile
> Broadband connection.
> 
> I can't get Mobile Broadband to work either on my Ubuntu 8.10 while any
> WiFi or LAN connection remains enabled. It results in a very wierd
> setup, where the default route remains on the wlan0 interface (or eth0,
> for that matter...).

That part is expected, since WiFi is almost always faster than the 3G,
NM will prefer the wifi as your primary connection.

> ~$ route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric  Iface
> 10.6.6.6        0.0.0.0         255.255.255.255 UH    0       ppp0
> 172.20.124.0	0.0.0.0		255.255.255.0	U     2	      wlan0
> 169.254.0.0     0.0.0.0         255.255.0.0     U     1000    ppp0
> 0.0.0.0         172.20.124.1    0.0.0.0         UG    0       wlan0
> 
> 
> Yet, the Mobile ISP's DNS servers take precedence over the WLAN ones:

That's not expected, and not something I can duplicate with the 0.7.0
release code.  It could be an Ubuntu-specific bug; trying the latest PPA
code which is more up-to-date might help to isolate the cause of this.

Dan

> marc torch:~$ more /etc/resolv.conf
> # Dynamic resolv.conf(5) file for glibc resolver(3) generated by
> resolvconf(8)
> #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
> nameserver 138.188.101.186
> nameserver 138.188.101.189
> nameserver 172.20.124.1
> 
> 
> 
> This can't work, really - what if the Mobile ISP assigns DNS addresses
> that are not routeable via the WLAN network?
> 
> 
> regards
> 
> Marc
> 
> 
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