Thanks a lot Sylvain and Ajay for your replies. On Thu, Jun 21, 2018 at 3:23 PM, Ajay Bhargav (SiWi) < cont...@rickeyworld.info> wrote:
> Hi Nishant, > > > > It is normal for network providers to close PDP context. And 2hrs seems to > be common duration as per what I have tested. All you can do is simply > reconnect. Moreover IP provided by most service providers are not public so > you wont be able to run a server in most cases and IP will change all the > time for sure. > > > > Regards, > > Ajay B. > > > > > > *From: *Sylvain Rochet <grada...@gradator.net> > *Sent: *Thursday, June 21, 2018 2:19 PM > *To: *Mailing list for lwIP users <lwip-users@nongnu.org> > *Subject: *Re: [lwip-users] PPP phase dead every 2 hours > > > > Hi Nishant, > > > > On Thu, Jun 21, 2018 at 12:37:09PM +0545, Nishant Agrawal wrote: > > > 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. > > > > That's the normal clean disconnection behavior. I believe the peer sent > > you a LCP TermReq request. Could you check that ? (Using PPP_DEBUG and > > PRINTPKT_SUPPORT support). > > > > > > > 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. > > > > This is no such renew thing in PPP. If the peer change your local IP > > address it means it really want to change it or just they don't care at > > all and give a random one each time you connect. > > > > There is no such thing of IP lease time as well, if a peer disconnect > > you every two hours it means the peer want you to reconnect every two > > hours. > > > > However, you could try with another modem brand/model, I doubt the issue > > is on the modem side (once in a while :p) but some of them are, > > especially cellular ones, are doing stupid things or just full of bugs. > > > > > > > Or what I can I do to keep the device connected? > > > > Well, ask your ISP to stop disconnecting you every two hours :-) > > > > > > Sylvain > > > > _______________________________________________ > lwip-users mailing list > lwip-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/lwip-users > -- With Regards, Nishant Agrawal, Real Time Solutions Pvt. Ltd. Dhobighat, Patan-44600, P.O. Box: 25090 Phone: +977-1-5538687, 5529953 Ext: 1442 Fax: +977-1-5525695, Mobile: +977 9802034152 www.wscada.com www.easy-q.com
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