Subject: Re: PPP and flow control
To: Mike Long <email@example.com>
From: None <firstname.lastname@example.org>
Date: 01/20/1996 08:47:46
At 14:50 1/17/96, Mike Long wrote:
>I'm still having problems sending data over my PPP link. I can
>receive data or send *small* amounts of data without difficulty
>(e.g. sup works); but any attempt to send a chunk of data over a
>certain limit fails. The only possible explanation I think likely is
>that flow control is broken. I am running an i386 -current system; my
>PPP link runs on my 14.4kbps modem.
>I experimented with ping's -s flag last night. While pinging a
>machine 3 hops away over a PPP link:
>64 byte packets: 0% failure
>128 byte packets: 0% failure
>256 byte packets: 0% failure
>384 byte packets: 38% failure
>512 byte packets: 100% failure
>Anything over 512 bytes also has 100% failure.
>I first ran into trouble after I switched from gcc 2.4.5 to 2.7.2, but
>my current kernel was built with -fno-strength-reduce.
>Can anyone give me any pointers as to how I can diagnose and debug
>Mike Long <email@example.com> http://www.shore.net/~mikel
>VLSI Design Engineer finger firstname.lastname@example.org for PGP public key
>Analog Devices, CPD Division CCBF225E7D3F7ECB2C8F7ABB15D9BE7B
>Norwood, MA 02062 USA (eq (opinion 'ADI) (opinion 'mike)) -> nil
Have you checked to ensure that the MTU being used on BOTH ends of the link
are set to the same amount?