Question

We cannot acquire an DHCP address over qmi_wwan driver when using Raspbian Linux OS?

Solution

Raspbian uses dhcpd to probe all available network interfaces found in the system, which is problematic for the qmi_wwan driver interface, if it is done before being configured properly when using cellular modules supporting only Raw-IP.



This can be avoided by setting dhcpd to deny the related cellular module network interface (most often named wwan0 by the system).

Add to the /etc/dhcpcd.conf file in Raspbian the following line (in the end):

denyinterfaces wwan0



Now, restart the system (preferably re-power it) so cellular module fully restarts also.



At next startup, the settings should be applied and you can now configure and use the qmi interface as described in some of the others faq's, found on the Techship webpage.