Configuring network on Sierra EM7455: Lenovo x260

[Joshua Deare]

Thanks for the clarification there. I don't use NetworkManager, I've
had bad experiences in the past so I just use netctl for all my
things. But I found my issue. I was falling back to use the /24 net
prefix I'm used to on a typical home network rather that the /29
prefix. So I was calculating my broadcast address incorrectly.
Realizing this and changing to use the proper broadcast address got me
pinging out just great! I'll just script together something to scrape
the mmcli output and configure the iface. I know this isn't the
libmbim mailing list, but do you know if there would be interested in
a patch against the mbim-network script to allow for iface management?

On Wed, Apr 20, 2016 at 2:16 AM, Aleksander Morgado
<aleksander at aleksander.es> wrote:
> On Wed, Apr 20, 2016 at 6:14 AM, Joshua Deare <josh at compose.io> wrote:
>>
>> At this point I would think everything would be okay. But when I do this:
>> $ ip addr show wwp0s20f0u3i12
>> 2: wwp0s20f0u3i12: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop
>> state DOWN group default qlen 1000
>>     link/ether c6:e0:06:16:32:5c brd ff:ff:ff:ff:ff:ff
>>
>> the device isn't up and/or configured. Am I mistaken that ModemManager
>> takes responsibility for configuring the interface? If I
>> $ ip link set wwp0s20f0u3i12 up
>> then the interface goes into an unknown state. If I also take steps to
>> manually configure the static IP for the interface with iproute2 then
>> I still can't ping out. Ideas here? I'm suffering from "oh I'm so
>> close" syndrome.
>
> ModemManager won't configure the network interface, no. It will expose
> in the Bearer object what to do; in this case it's requesting to set
> the static IP configuration, which you need to do manually. Which are
> the exact iproute2 commands you're using to try to configure the wwan?
>
> But, I believe there may be a quicker way to get you working, if
> you're using NetworkManager, are you? If you're using NetworkManager,
> you just need to run the FCC auth command via cli, and then let the
> MM/NM pair work together to bring up the connection; no need to
> manually create the bearer and all that.
>
>
> --
> Aleksander
> https://aleksander.es