Need help with Linux PPP connection and Telit modem

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  • Updated 2 years ago
Trying to get PPP up on a custom ARM board running a Yocto flavor of Linux. The same modem, with the same configuration files works fine on a different (but similar) board.

The failed debgug messages are (after removing the account name and password):

pppd &[1] 802
pppd options in effect:
debug           # (from /etc/ppp/options)
nodetach                # (from /etc/ppp/options)
persist         # (from /etc/ppp/options)
dump            # (from /etc/ppp/options)
noauth          # (from /etc/ppp/options)
user              # (from /etc/ppp/options)
password ??????         # (from /etc/ppp/options)
/dev/ttyACM0            # (from /etc/ppp/options)
115200          # (from /etc/ppp/options)
lock            # (from /etc/ppp/options)
connect /usr/sbin/chat -v -t15 -f/etc/ppp/chatscripts/                # (from /etc/ppp/options)
crtscts         # (from /etc/ppp/options)
noaccomp                # (from /etc/ppp/options)
-ac             # (from /etc/ppp/options)
nopcomp         # (from /etc/ppp/options)
lcp-echo-failure 3              # (from /etc/ppp/options)
lcp-echo-interval 3             # (from /etc/ppp/options)
show-password           # (from /etc/ppp/options)
novj            # (from /etc/ppp/options)
novjccomp               # (from /etc/ppp/options)
ipcp-accept-local               # (from /etc/ppp/options)
ipcp-accept-remote              # (from /etc/ppp/options)
noipdefault             # (from /etc/ppp/options)
defaultroute            # (from /etc/ppp/options)
usepeerdns              # (from /etc/ppp/options)
nobsdcomp               # (from /etc/ppp/options)
root@imx6soloc421:/etc/ppp# chat:  May 26 22:21:25 CONNECT
Script /usr/sbin/chat -v -t15 -f/etc/ppp/chatscripts/ finished (pid 803), status = 0x0
Serial connection established.
using channel 1
Using interface ppp0
Connect: ppp0 <--> /dev/ttyACM0
rcvd [LCP ConfReq id=0x1 <asyncmap 0x0> <auth pap> <magic 0x96a24aa4> <pcomp> <accomp>]
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x9950d399>]
sent [LCP ConfRej id=0x1 <pcomp> <accomp>]
rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x9950d399>]
rcvd [LCP ConfReq id=0x2 <asyncmap 0x0> <auth pap> <magic 0x96a24aa4>]
sent [LCP ConfAck id=0x2 <asyncmap 0x0> <auth pap> <magic 0x96a24aa4>]
sent [LCP EchoReq id=0x0 magic=0x9950d399]
sent [PAP AuthReq id=0x1 user="" password="XXXXXXXX"]
rcvd [LCP EchoRep id=0x0 magic=0x96a24aa4]
rcvd [PAP AuthAck id=0x1 ""]
PAP authentication succeeded
sent [CCP ConfReq id=0x1 <deflate 15> <deflate(old#) 15>]
sent [IPCP ConfReq id=0x1 <addr> <ms-dns1> <ms-dns2>]
rcvd [LCP ProtRej id=0x3 80 fd 80 fd 01 01 00 0c 1a 04 78 00]
Protocol-Reject for 'Compression Control Protocol' (0x80fd) received
sent [LCP EchoReq id=0x1 magic=0x9950d399]
sent [IPCP ConfReq id=0x1 <addr> <ms-dns1> <ms-dns2>]
rcvd [LCP EchoRep id=0x1 magic=0x96a24aa4]
rcvd [LCP TermReq id=0x4]
LCP terminated by peer
sent [LCP TermAck id=0x4]
Modem hangup
Connection terminated.
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Patrick Philp

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Posted 2 years ago

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Photo of Norma Pavao

Norma Pavao, Official Rep

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Hello Patrick,

Your inquiry has been directed to our engineers for review.  I will provide you an update on their assessment of the reported issue you have submitted.  Thank you for your patience while we investigate this matter.

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Norma Pavao, Official Rep

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Hello Patrick,

Per review from our engineers the disconnect is being rejected due to compression setting.
It has been recommended you try to add “nodeflate” option in the /etc/ppp/peers/options file, can you attempt this and let me know the results of this change?

Thank you,