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[lwip-users] PPP phase dead every 2 hours


From: Nishant Agrawal
Subject: [lwip-users] PPP phase dead every 2 hours
Date: Thu, 21 Jun 2018 12:37:09 +0545

Hello,

I am using the ppp stack, using a modem to keep a device online and it is sending ping requests every 30 seconds. The problem is that roughly every 2 hours, I end up with error, PPPERR_CONNECT. The phase change generally is as follows,

PHASE_NETWORK
PHASE_ESTABLISH
PHASE_DISCONNECT
PHASE_DEAD

The PHASE_NETWORK and ESTABLISH happens simultaneously. PHASE_DISCONNECT happens about 5 seconds later and the phase goes to DEAD immediately as well. After PHASE_DEAD, I get the error, PPPERR_CONNECT. I believe that the issue is related to the IP lease time. Because the time is more or less consistent and I am seeing the same pattern with 2 different prototypes that are on test. And every time I reconnect I get a new IP. So my question is, is there any way for me to request a renew of the old connection, like something that can be done with DHCP. Or what I can I do to keep the device connected?


--
With Regards,
Nishant Agrawal


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