2017-07-01 12:28 GMT+08:00 Axel Lin <[email protected]>: > 2017-07-01 0:47 GMT+08:00 Patrick Klos <[email protected]>: >> On 6/30/2017 11:18 AM, Axel Lin wrote: >>> >>> It's not easy to hit this issue, usually it needs to run for a couple >>> hours or more than one day. >>> But the symptom seems to be the same. >>> >>> BTW, my device always keep sending data to LTE through pppos. >>> I'm wondering why the bad fcs usually happened on LCP packet. >> >> >> Can you dump out the failing LCP packet? And maybe a few of the preceding >> packets? What kind of connection do you have between the micro running lwip >> and the LTE modem? Is there any way to tap that serial link and watch it to >> compare that against your micro's serial receive routine? > Hi Patrick, > > I cannot tap the serial link now, but I will try to dump out the failing > packet. > My device keep sending data to a http server. > i.e. compare to the the total traffic count, LCP packet is pretty small count. > So i'm wondering why the bad fcs usually happens on LCP packet. > I have to test it more times.
The bad fcs issue I hit is because of running out of pbuf. pppos_input[0]: NO FREE PBUFS! pppos_input[0]: Dropping bad fcs 0xceb3 proto=0xb7 I'm testing again after increasing number of PBUF_POOL. _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
