Я давно использую pppd на стандартном rasbiany (raspberry pi 3b), никогда не сталкивался с проблемой подключения inte rnet. Но на этот раз я использую пользовательское linux изображение для малины (созданное yocto) и сталкиваюсь с проблемой при подключении inte rnet, как показано в журналах ниже. UART соединение работает нормально между малиной и 4g модемом. любезно предлагаю для того же. Спасибо
ATZ
OK
AT+CGDCONT=1,"IP","portalnmms","",0,0
OK
ATD*99#
CONNECT
Script chat -v -f /etc/ppp/chat/4g.chat finished (pid 6198), status = 0x0
Serial connection established.
using channel 30
Using interface ppp0
Connect: ppp0 <--> /dev/ttyAMA0
Warning - secret file /etc/ppp/pap-secrets has world and/or group access
sent [LCP ConfReq id=0x1c <asyncmap 0xa0000> <magic 0xa8f80db7> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x74 <asyncmap 0x0> <auth chap MD5> <magic 0xcfcfa215> <pcomp> <accomp>]
sent [LCP ConfNak id=0x74 <auth pap>]
rcvd [LCP ConfAck id=0x1c <asyncmap 0xa0000> <magic 0xa8f80db7> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x75 <asyncmap 0x0> <auth pap> <magic 0xcfcfa215> <pcomp> <accomp>]
sent [LCP ConfAck id=0x75 <asyncmap 0x0> <auth pap> <magic 0xcfcfa215> <pcomp> <accomp>]
sent [LCP EchoReq id=0x0 magic=0xa8f80db7]
Warning - secret file /etc/ppp/pap-secrets has world and/or group access
sent [PAP AuthReq id=0xa user="raspberrypi3" password=<hidden>]
rcvd [LCP DiscReq id=0x76 magic=0xcfcfa215]
rcvd [LCP EchoRep id=0x0 magic=0xcfcfa215 a8 f8 0d b7]
rcvd [PAP AuthAck id=0xa ""]
PAP authentication succeeded
sent [CCP ConfReq id=0xa <deflate 15> <deflate(old#) 15> <bsd v1 15>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
rcvd [LCP ProtRej id=0x77 80 fd 01 0a 00 0f 1a 04 78 00 18 04 78 00 15 03 2f]
Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [IPCP ConfReq id=0xa <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
sent [LCP EchoReq id=0x1 magic=0xa8f80db7]
IPCP: timeout sending Config-Requests
sent [LCP TermReq id=0x1d "No network protocols running"]
sent [LCP TermReq id=0x1e "No network protocols running"]
Connection terminated.
Modem hangup