Re: silo overflow

[Laurence Moore <lmoore@starwon.com.au>]

On Sun, 2 Dec 2001, Florian Zimmermann wrote:

> Hi there,
> 
> i got this annoying messages while i send data
> via the serial port, the data is transmitted
> in a say...fucking slow way as well from the first
> occurence of the message at least.
> 

Its probably slow because of the errors in the ppp frames that have to be
re-transmitted. I have achieved a sustained throughput of about 18KBytes
per second with pppd and no or silo overflows using a baud rate of 230400.

> /etc/ppp/peers/ipaq:
> 
> -detach
> noauth
> lock
> debug
> user ppp
> connect '/usr/sbin/chat -v -t3 ogin--ogin: ppp'
> tty00 115200 nocrtscts
> 192.168.1.1:192.168.1.46

Your problem is most likely attributed to handshakeing problems. If you
aren't going to use RTS/CTS flow control then you are going to need to
setup your modems to use software (XON/XOFF) flow control which is usually
activated with AT&K4 being sent to the modems. However hardware flow
control is the best way to drive the modem for a DATA connection.

You could use netstat -ni to see what the error counts are for the ppp
interfaces.

Cheers,

Larry.