<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Hi Bjorn,</div><div><br></div><div>Thanks your detailed explanation.</div><div><br></div><div>As to qmi_wwan support dummy header, is there patch about this now?</div><div><br></div><div>Thanks</div><div><br></div><br><br><br><br><div style="position:relative;zoom:1">--<br><div>
<div style="FONT-SIZE: 14px">
<div align="left"><strong><font color="#0000ff"><em>Best Regards,</em></font></strong></div>
<div><strong><font color="#0000ff"><em>Dai,Lijin</em></font></strong></div></div></div><div style="clear:both"></div></div><div id="divNeteaseMailCard"></div><br><pre><br>At 2016-09-09 15:59:34, "Bjørn Mork" <bjorn@mork.no> wrote:
>dailijin <dailijin126@126.com> writes:
>
>> Hi All,
>>
>>
>> I just now test Sierra dev kit and driver, the MC7430 can work and get
>> IP via dhclient, Does this indicate the modem work on 802-3 protocol?
>
>No, but the GobiNet driver will add and strip the ethernet header, so it
>appears so to the host. This is similar to what e.g. cdc_mbim does for
>MBIM functions.
>
>We had an informal vote for or against that model before implementing
>the qmi_wwan raw-ip support, and it was rejected. If anything, I regret
>having pushed for doing it in cdc_mbim. And I definitely regret having
>chosen 802-3 as the default mode for qmi_wwan. We would have been much
>better off with raw-ip from the beginning, and just rejected the
>ethernet illusion. But time machines are currently too expensive for me
>;)
>
>
>> Before somebody told me the MC7430 only can work with raw-ip mode,
>
>Correct.
>
>> so need use udhcpc include dhclient to get IP,
>
>Correct for qmi_wwan, since it does not fake an ethernet interface in
>raw-ip mode.
>
>As you have found out, there are ways to make dhclient work too since
>the modem does run a DHCP server. One method is making the driver add
>dummy headers. Another method is making dhclient accept that there is
>no header
>
>> I want to test MC7430 modem work on 802-3 mode with qmi_wwan driver,
>> but always set data packet as 802-3 fail. Does anyone know how to do
>> this?
>
>Not supported by the MC7430. Just ask Sierra Wireless.
>
>
>Bjørn
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