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[lwip-devel] [bug #49285] PPP doesn't get connected anymore after a link

From: Marco
Subject: [lwip-devel] [bug #49285] PPP doesn't get connected anymore after a link fail
Date: Thu, 6 Oct 2016 14:40:48 +0000 (UTC)
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36


                 Summary: PPP doesn't get connected anymore after a link fail
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: marcoe
            Submitted on: Thu 06 Oct 2016 02:40:45 PM GMT
                Category: PPP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: Other



The use case is a PPP (PPPoS) connection to a GPRS modem. 
We have developed our firmware and tested it using the lwip version
STABLE-2_0_0_RC1 and all what we have tested was ok.
Now we have decided to upgrade to the RC2 version but we have found the
following problem: if the GPRS link fails (for example, to have a easy
reproducible condition, removing and then reinserting the SIM) the PPP can't
When it's working the PHASE sequence is 3,6,9,10, while when it's failing the
sequence is 3,6,9,6,12,0.

I've identified the last working commit as the one with commit hash =


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