From owner-freebsd-isp Mon Oct 14 00:44:04 1996 Return-Path: owner-isp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id AAA07612 for isp-outgoing; Mon, 14 Oct 1996 00:44:04 -0700 (PDT) Received: from labinfo.iet.unipi.it (labinfo.iet.unipi.it [131.114.9.5]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id AAA07553; Mon, 14 Oct 1996 00:43:58 -0700 (PDT) Received: from localhost (luigi@localhost) by labinfo.iet.unipi.it (8.6.5/8.6.5) id IAA12451; Mon, 14 Oct 1996 08:13:59 +0100 From: Luigi Rizzo Message-Id: <199610140713.IAA12451@labinfo.iet.unipi.it> Subject: ppp over vty possible ? To: question@freebsd.org Date: Mon, 14 Oct 1996 08:13:59 +0100 (MET) Cc: isp@freebsd.org X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-isp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Hi, I was wondering if there is an easy way to run ppp over a pty/ttyp pair in order to make some tests. For those interested on which tests I want to do: When I use ppp from home (14.4 modem) with telnet (and possibly other apps, I haven't checked), the RTT is suspiciously close to 200 ms (within 10ms; I have a modified kernel which prints the current RTT and bandwidth on every connection). As you can imagine, typing this way is not the most pleasant thing in the world. I suspect that something is triggering delayed acks, but don't know what. The same does not occur with local connections, or even with hosts a few hops apart. The modem should add roughly 40ms each way (perhaps less, since there is PRED1 compression enabled -- and the same happens with VJ_COMP), so I really cannot tell where the delay comes from. Thanks Luigi ==================================================================== Luigi Rizzo Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it Universita' di Pisa tel: +39-50-568533 via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 http://www.iet.unipi.it/~luigi/ ====================================================================