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Re: [lwip-users] Question about pppos sometimes fail to reach internet

From: Axel Lin
Subject: Re: [lwip-users] Question about pppos sometimes fail to reach internet
Date: Mon, 20 Feb 2017 01:08:53 +0800

2017-02-20 1:02 GMT+08:00 Sylvain Rochet <address@hidden>:
> Hi Axel,
> On Mon, Feb 20, 2017 at 12:40:47AM +0800, Axel Lin wrote:
>> 2017-02-20 0:34 GMT+08:00 Sylvain Rochet <address@hidden>:
>> >
>> > It looks like your modem is not forwarding packets. Which one it is so
>> > we can prevent using it in our designs ? ;-)
>> I don't get it, I'm using Gemalto ELS31J module.
> Thank you, added to blacklist ;-)
>> I compare the successful log below: Seems some pppos_input() got
>> different length.
> A serial link is a byte stream, having different buffer lengths for each
> run is normal behavior.

Right, after checking more log I think it's normal to get different
buffer lengths.

> Anyway, you can enable PPP packet trace with PRINTPKT_SUPPORT and
> optionally PPP_PROTOCOLNAME if you wish to have a closer look at PPP
> control packets content but I doubt it will provide any useful
> information in this case because the session is successfully
> established.

Thanks a lot, I'll try it.

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