Date: Mon, 14 Oct 1996 08:21:30 +0100 (MET) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: questions@freebsd.org Subject: ppp over pty/ttyp possible ? Message-ID: <199610140721.IAA12488@labinfo.iet.unipi.it>
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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/ ====================================================================
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