Installing SLIP

[Robin Wilson]

In article <2737 at sirius.ucs.adelaide.edu.au> john at chook.ua.oz (John Warburton) writes:
>From article <1991Mar28.155736.2688 at rock.concert.net>, by rmccoy at rock.concert.net (Ron McCoy - Yale Security):
>> I'm trying to set up SLIP on a couple of RS/6000's. Please be
>> gentle, I'm new at this and RTFM'ing as fast as I can.

>Well - I rang up Mr IBM and (finally) got a copy of their fix for this.
A
>You must be running 3003 for this to work though...
>ok - checklist:
>	1) TCP/IP installed
>	2) tty configured properly for the modem. Also you should add "clocal"
>	  to "stty attributes for run time" when configuring the tty.

Wrong.  This will have no affect on a SLIP line.  The "stty attributes for
runtime" are not set until after a getty process has called "login" and login
has successfully verified your login name and password.  So setting "clocal"
here will not do anything.  Instead, you must strap Carrier Detect High on 
the modem.  (This is a bug, and will be fixed in a later version...)  This
is something I often forget about because the last version I played with had
the fix in it...  This is caused by the "BLOCKING" IO on the serial port
line discipline.  Slattach does not open the port with non-blocking IO so
it can't write to the serial port until Carrier Detect comes high.


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