Subject: Re: ppp woes continued
To: Hauke Fath <hauke@Espresso.Rhein-Neckar.DE>
From: Bill Studenmund <>
List: current-users
Date: 11/06/1999 23:00:57
On Sat, 6 Nov 1999, Hauke Fath wrote:

> At 10:44 Uhr +0100 06.11.1999, Ignatios Souvatzis wrote:
> >On Fri, Nov 05, 1999 at 10:55:41PM -0800, Space Case wrote:
> >> Nov  5 22:29:13 c610 /netbsd: zstty0: 22 silo overflows, 3 ibuf floods
> ibuf floods, even, and on a Q650... what port speed are you using? You can
> bump the serial buffer size somewhere in dev/zs.c, IIRC.

Steve, consider lowering your connection speed with the moden. silo
overflows are bad, especially this many of them that fast. Each one means
that you've messed up a ppp packet (though once a packet's dead, more
won't make that packet worse :-)

> >to me, this sounds like a handshaking problem. 
> >
> >You probably know that, but you have to
> >
> >- check that your pppd uses crtscts, (or maybe it is cdtrcts for your sort
> >  of Mac?)
> You want cdtrcts -- which, IMO, is a bad misnomer, because on mac68k it
> delivers what drtscts promises to do. This is causing all sorts of havoc
> when you try to run off-the-shelf unix comm applications on mac68k (try to
> run uucp with hardware flow control =8( ).

Well, there two reasons we named it like we did. First off, in terms of
the chip, it really is the DTR line (RTS is used to turn the line drivers
on and off). Also, a fair amount of Apple serial port documentation talks
about "DTR" handshaking. :-)

Though we really should fix all packaged comm stuff to support cdtrcts.
Please file a PR if we've messed up.

Take care,