From: hedrick@geneva.rutgers.edu (Charles Hedrick) Subject: Re: Trouble with KA9Q/SLIP Date: 23 Jan 1993 00:51:50 GMT
daves@techmpc.csg.mot.com (Dave Schmitt) writes:
>I've been trying to get KA9Q to talk SLIP with a machine at work
>over a modem, but apparently they don't speak the same dialect
>of slip, or the terminal server is interfering. When I try
>to ping from the remote end, this is the error message KA9Q
>gives:
>l0 recv: [Tue Jan 19 20:40:00 1993]
>IP: len 84 100.0.0.1->100.0.0.2 ihl 20 ttl 64 prot ICMP
>ICMP: Echo Request id 28392 seq 36 CHECKSUM ERROR (4626)
I wonder if you're overflowing a buffer on the machine at the other
end. I looks to me like the overall packet structure is OK, so there
doesn't seem to be a gross compatibility problem. Checksum error
probably indicates either some bytes are being garbled or dropped. If
you're going through a terminal server, make sure both it and telnetd
on your machine give a transparent path. It looks like you're getting
the high order bit, so the other possibility is that its turned LF
into CRLF or something like that. On our cisco terminal servers you
have to do "term download" if you want a transparent path. We've also
had to patch telnetd on the Unix machines for some releases, in order
to give a transparent path.