From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick Mahan Date: Wed, 27 May 2020 19:16:07 +0000 Subject: PPP cycling between UP and DOWN Message-Id: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ppp@vger.kernel.org PPP v2.3.11 RP-PPPOE v3.12 Linux 2.6.35 I am seeing some issues with respect to how PPP is handling a PPPoE connection. My PPPoE connection gets established and pppd reports UP via the ip-up script. Then at some point (sometimes within a second, sometimes hours) pppd reports down via the ip-down script, but does not exit then re-establishes the UP state and reports it via ip-up. I have a script that monitors by this by having a modified ip-up and ip-down script write a value to a specific file under /var/run/pppd/ and if it is ip-down, then I schedule a restart of pppd to occur once the pppd image exits. I have assumed that ip-down being triggered is and indication that PPPoE connection is down and over. But I am now seeing that this assumption could be incorrect. I don't claim to understand the entire protocol layers involved. But is it supported that a PPPoE connection can shift back from the IPCP layer to the LCP layer? Then back? Or is this a ppp protocol issue. I see in the pppd code that we can moved to a down state if we get a request to restart negotiations, so I can see that my assumption may be incorrect. Any help is appreciated. Thanks, Patrick