MC7304 + Get current settings + manual IP settings

[Aleksander Morgado]

On Sun, Jun 5, 2016 at 6:33 PM, Aleksander Morgado
<aleksander at aleksander.es> wrote:
> I've been playing today with --wds-get-current-settings, trying to
> manually setup the WWAN without using DHCP, and failed miserably, not
> sure why.
>
> Once I get the device in 802-3 LLP, connected via WDS Start Network,
> and then get the current settings, I basically just do:
>
> $ sudo ip link set dev wwan1 up
> $ sudo ip -4 addr add 47.59.92.71/255.255.255.240 dev wwan1
> $ sudo ip link set dev mtu 1430
> $ sudo ip route add default via 47.59.92.65 dev wwan1
>
> And try to ping...
> $ ping -I wwan1 8.8.8.8
>
> It won't work at all.
>
> But, if I just run dhclient on the interface, which ends up setting
> the same setup, it ends up working...
>
> $ dhclient wwan1
>
> $ ping -I wwan1 8.8.8.8
> PING 8.8.8.8 (8.8.8.8): 56 data bytes
> 64 bytes from 8.8.8.8: seq=0 ttl=52 time=1808.345 ms
> 64 bytes from 8.8.8.8: seq=1 ttl=52 time=809.933 ms
> 64 bytes from 8.8.8.8: seq=2 ttl=52 time=68.077 ms
>
> Interestingly, if I explicit tell ModemManager to request static IP
> settings to NetworkManager, I do get connected (I assume without DHCP
> involved).
>
> Any idea? What am I missing? Why does DHCP actually work here and not
> manual IP settings?

I just found this old thread where Dan says that "there are other
reports of static not working with Sierra Qualcomm-based 73xx devices
too."
https://lists.freedesktop.org/archives/modemmanager-devel/2014-August/001472.html

Hum... Did we ever know why this is like this?

-- 
Aleksander
https://aleksander.es