protocol 0806 is buggy, dev usb0 !

[Gopakumar Choorakkot Edakkunni]

Hi Markus,

It is an OpenWRT box, I am not using any web interfaces, just command
line (plug it in, cdc-ether gives me a usb0 and I launch udhcpc on it
etc..) .. I realise its pbbly a kernel bug, I was just trying my luck
to see if anyone in the modem alias has seen this before :) ..
Especially because this happens only on the modem usb0 interface in my
openwrt box and not on the wired ethernet interfaces! Will keep
looking, thanks !

Rgds,
Gopa.


On Fri, Jan 9, 2015 at 2:13 PM, Markus Gothe <nietzsche at lysator.liu.se> wrote:
> Are you using the CWID / WebUI interface (I am pretty sure you are)??? Then I guess you are on your own.
>
> You should use tcpdump or wireshark to disinsect the ARP packets and look in the kernel ARP-code for what is going wrong.
>
> Try an earlier kernel and see what happens (or check the git changelog for neigh.c et. al).
>
> //M
>
> Sent from my mobile...
> Den 9 jan 2015 10:43 skrev Gopakumar Choorakkot Edakkunni <gopakumar.c.e at gmail.com>:
>>
>> Forgot to mention: the kernel version is 3.12.27
>>
>> Rgds,
>> Gopa.
>>
>> On Fri, Jan 9, 2015 at 2:36 AM, Gopakumar Choorakkot Edakkunni <gopakumar.c.e at gmail.com> wrote:
>>>
>>> I have a ZTE MF823 modem using cdc-ether driver which gives a usb0 interface. It works well for the most part, but I keep seeing the below messages in dmesg once in every 5 seconds. Its clearly complaining about the ARP packets, the modem has some instability issues, not sure if thats related to this message. A googling doesnt give much info other than users reporting this once in a while - if anyone has more info about this please share, that will be of great help !
>>>
>>> "protocol 0806 is buggy, dev usb0"
>>>
>>> Rgds,
>>> Gopa.
>>
>>