• PPP over standard serial port

    From xieblueone@gmail.com@21:1/5 to All on Sun Nov 19 18:54:31 2017
    I try to run:
    pppd proxyarp mtu 1280 persist nodeflate noauth lcp-echo-interval 10
    crtscts lock 10.10.1.2:10.10.1.1 /dev/ttyS4 115200 debug nodetach

    in my system,and it sending the same thing over and over:

    sent [LCP ConfReq id=0x1 <asyncmap
    <magic 0x8bab12d4> <pcomp> <accomp>]

    How can I check the problem

    Thank you!

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  • From Moe Trin@21:1/5 to All on Mon Nov 20 21:15:08 2017
    On Sun, 19 Nov 2017, in the Usenet newsgroup comp.protocols.ppp, in article <fa1ebc1a-2d3e-451a-b474-2a2107ac07e0@googlegroups.com>,
    xieblueone@gmail.com wrote:

    NOTE: Posting from groups.google.com (or some web-forums) dramatically
    reduces the chance of your post being seen. Find a real news server.

    I try to run

    pppd proxyarp mtu 1280 persist nodeflate noauth lcp-echo-interval 10
    crtscts lock 10.10.1.2:10.10.1.1 /dev/ttyS4 115200 debug nodetach
    in my system

    What are you trying to do? Connect to an ISP? Connect a serial
    link to another computer? What operating system? You show
    "/dev/ttyS4" which in Linux would be the fifth (very uncommon) classic
    RS-232 serial port. Assuming Linux, what does 'ls' show?

    [spica ~]$ ls /dev/ttyS*
    /dev/ttyS0 /dev/ttyS1 /dev/ttyS2 /dev/ttyS3
    [spica ~]$

    During boot, is your kernel loading an appropriate serial driver?
    In /var/log/dmesg, I see

    [ 0.518034] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
    [ 0.538368] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

    Notice the second line - on this computer, there is an actual RS-232
    serial port. On two other computers here, the line is missing
    because there is no classic serial port (everything is USB, which is
    a different device and driver).

    and it sending the same thing over and over

    sent [LCP ConfReq id=3D0x1 <asyncmap
    <magic 0x8bab12d4> <pcomp> <accomp>]

    "Hello! Is anyone out there?"

    The peer at the other end of the serial link is not responding.
    Is your connection to the peer (modem, cross-over cable or similar)
    connected? Is there a pppd daemon listening on the appropriate port
    on the peer? More details needed.

    Old guy

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