problems with huawei E3372 alias Telekom Speedstick V

[Thomas Schäfer]

Am 04.09.2014 09:42, schrieb Bjørn Mork:
> Thomas Schäfer <tschaefer at t-online.de> writes:
>

> So this works better with 3.11 than with 3.17?  That's not good...
>

No panic, (all) other devices still work.


> But at least it shows us that this modem does not have any problems
> with the 16bit headers.  There DHCP offer and ack are nicely wrapped
> as 16bit versions.



> But in any case: This modem deals with it, so that's not why we have
> problems.  The problem seems to be a lack of replies to the ARP
> requests we send.  You could try turning off ARP on the wwan0
> interface and see if that helps.  Something like "ifconfig wwan0
> -arp" should do.

I will test it.


>
> I do wonder if that maybe should be the default for the
> huawei_cdc_ncm driver?
>
> But this still doesn't answer why we don't get any DHCP replies in
> 3.17.  Could explain why you couldn't make the connection work with
> static addressing though, so it might be worth testing.

dhcp is not very stable in 3.11 too. It works only once.
I said it was repeatable, but only if I completely start again.


I will try it again with static settings/routes. But this is 
error-prone, because I have no nice script for decoding at^dhcp, and i 
get completely different configurations with every new connection.

Thomas