Unable to connect using a Quectel EC25-E modem and libqmi 1.18.0

Bjørn Mork bjorn at mork.no
Thu Jun 29 07:37:20 UTC 2017

xyj <xuyj at smartkey.com.cn> writes:

> Although IP obtained successfully, the information from `ip a` is quirk, for example:
> 1: lo
> ......
>  3. wwan0: <....>
> 	link/none					--> this line is quirk.
> 	inet scope global wwan0
> 	....
> Is it because of raw-ip mode? More knowledge to learn.

There is no link layer.  The first header is IP.  So "link/none" is as
precise as it gets :-)

I did consider using a new "raw-ip" L2 header type, but couldn't find a
real reason. The only effect would be pointless changes to all tools
dealing with the link layer (ip, ifconfig etc). So "none" it is.  This
is similar to "tun" interfaces.

There is more reason to complain about the ifconfig output IMHO.  But
that is an old ifconfig bug - it does not respect header length = 0.
I don't think it is fixable though, as it has "always" been like that.
People would probably complain if it changed.  Besides, no one maintains
ifconfig anyway.


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