# Pppd connection loss then reconnect **URL:** \ **Category:** Network\ **Created:** [January 28, 2016, 8:46am UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319 "2016-01-28T08:46:23Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![saucompeng](https://linux-tips.com/user_avatar/linux-tips.com/saucompeng/32/176_2.png) [@saucompeng](https://linux-tips.com/u/saucompeng)\ **Post date:** [January 28, 2016, 8:46am UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/1 "2016-01-28T08:46:23Z")
Hi; I make pppd connection with configurations which are at the bottom. But many times later, my connection loses then can’t reconnect to internet. What is the stable configuration for pppd? ``` ttyACM0 460800 user internet password internet connect 'chat -f /etc/ppp/chat/gprs_chat -e' novj asyncmap 0 defaultroute usepeerdns debug kdebug 7 nodetach noipdefault lock modem lcp-echo-interval 0 lcp-echo-failure 4 lcp-max-configure 60 lcp-restart 2 idle 600 noipx logfile /home/logppp.txt ``` ---
**Author:** ![demirten](https://linux-tips.com/user_avatar/linux-tips.com/demirten/32/64_2.png) [@demirten](https://linux-tips.com/u/demirten)\ **Post date:** [January 28, 2016, 4:27pm UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/2 "2016-01-28T16:27:42Z")
Could you send pppd logfile output? ---
**Author:** ![saucompeng](https://linux-tips.com/user_avatar/linux-tips.com/saucompeng/32/176_2.png) [@saucompeng](https://linux-tips.com/u/saucompeng)\ **Post date:** [January 29, 2016, 5:29am UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/3 "2016-01-29T05:29:01Z")
logfile and pppd always on script : [https://drive.google.com/folderview?id=0B3FMvhilYdQFWjFHWnZXMG9uMms&usp=sharing](https://drive.google.com/folderview?id=0B3FMvhilYdQFWjFHWnZXMG9uMms&usp=sharing) ---
**Author:** ![demirten](https://linux-tips.com/user_avatar/linux-tips.com/demirten/32/64_2.png) [@demirten](https://linux-tips.com/u/demirten)\ **Post date:** [January 29, 2016, 10:42am UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/4 "2016-01-29T10:42:20Z")
There is no exact hint about the problem in the log file. You can check LCP configuration options starts with **lcp-** (see: [man pppd](http://manpages.org/pppd/8#options)) If you set `lcp-echo-interval` to 30 seconds and LCP-Echo requests failed at number of `lcp-echo-failure`, pppd will exit. It is not clear that how pppd behaves when `lcp-echo-interval = 0` like your setup. So, it is good to use a reasonable value here. You also have `idle = 600` parameter, so if no IP packets seen by pppd for last 600 seconds, it will be stopped. ---
**Author:** ![saucompeng](https://linux-tips.com/user_avatar/linux-tips.com/saucompeng/32/176_2.png) [@saucompeng](https://linux-tips.com/u/saucompeng)\ **Post date:** [January 31, 2016, 12:42pm UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/5 "2016-01-31T12:42:17Z")
My client is connecting to webservice every minute. This configuration is good for me ? ttyACM0 460800 user internet password internet connect 'chat -f /etc/ppp/chat/gprs\_chat -e’ novj asyncmap 0 defaultroute usepeerdns debug kdebug 7 nodetach noipdefault modem lcp-echo-interval 10 lcp-echo-failure 12 lcp-max-configure 60 lcp-restart 120 idle 600 noipx logfile /home/logppp.txt ---
**Author:** ![demirten](https://linux-tips.com/user_avatar/linux-tips.com/demirten/32/64_2.png) [@demirten](https://linux-tips.com/u/demirten)\ **Post date:** [January 31, 2016, 2:33pm UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/6 "2016-01-31T14:33:44Z")
You’re sending IP data on every 60 seconds. It will be good to detect GPRS session lost errors, so you can use ```auto lcp-echo-interval 30 lcp-echo-failure 2 ``` With above configuration, pppd will be terminated if it can’t get any replies for two consecutive LCP Echo Request. ---
**Author:** ![saucompeng](https://linux-tips.com/user_avatar/linux-tips.com/saucompeng/32/176_2.png) [@saucompeng](https://linux-tips.com/u/saucompeng)\ **Post date:** [February 1, 2016, 5:17pm UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/7 "2016-02-01T17:17:36Z")
Hi; I found problem, it is about usb driver. When repower modem, it works normallya again. Logs are at link. Could you analyse it ? [https://drive.google.com/folderview?id=0B3FMvhilYdQFYVgtcnRGNUIzZG8&usp=sharing](https://drive.google.com/folderview?id=0B3FMvhilYdQFYVgtcnRGNUIzZG8&usp=sharing) is it about this parameter? ``` dwc_otg.speed=1 //forces usb full-speed (12 Mbit/s), otherwise the usb is running at hi-speed (480 Mbit/s). ``` ---
**Author:** ![demirten](https://linux-tips.com/user_avatar/linux-tips.com/demirten/32/64_2.png) [@demirten](https://linux-tips.com/u/demirten)\ **Post date:** [February 1, 2016, 8:18pm UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/8 "2016-02-01T20:18:36Z")
It is not easy to find root cause of the problem. All of the USB 3G modems I used has very buggy drivers. None of them designed for 7x24 non-interactive work, it basically targets desktop user who can un-plug and plug the device again if it doesn’t work. It is also possible to have usb problems in your embedded board but I can easily say that main problem is the 3G usb modem itself according to my previous experience. So, good luck 😄 ---
**Author:** ![saucompeng](https://linux-tips.com/user_avatar/linux-tips.com/saucompeng/32/176_2.png) [@saucompeng](https://linux-tips.com/u/saucompeng)\ **Post date:** [February 2, 2016, 12:18am UTC](https://linux-tips.com/t/pppd-connection-loss-then-reconnect/319/9 "2016-02-02T00:18:31Z")
😕 I want to cry , insaallah I will find solution, If I find, I will share it. Thanks for your help.