Re: cdc_mbim problems with Fibocom L831-EAU

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> But for the above stuff, note that MBIM modems often (always?) do *not*
> support DHCP on the net interface.  You'll get best results by reading
> the IP configuration using the MBIM protocol and assigning those
> details to the device.  ModemManager will retrieve those for you, but
> it does not do IP configuration, instead leaving that up to something
> like NetworkManager or custom scripts.
>
> mbim-network also does not set the IP configuration for you, since a
> lot more is involved than just assigning the IP address to the
> interface.  (eg, should the DNS servers be written to resolv.conf?
> what if something else is managing resolv.conf?  Should a default route
> be added through the interface?  what if something else is managing the
> default route or you don't want that to happen?)

When I tried it, I disabled everything network-related and set the IP
address, net mask, default route and resolv.conf manually based on
data from mbimcli. When I tried to ping google.com afterwards it
failed due to "System error".
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