jim@baroque.Stanford.EDU (James Helman) (08/16/90)
pbiron@weber.ucsd.edu (Paul Biron) writes:
I got one reply from someone at Telebit, who explained
at little bit about PEP itself, and specifically about
Telebit's and SLIP. The jist of his message was that
Telebit's don't handle SLIP very well -- it causes
thrashing between small and large packets
Telebit (or someone they've
donated a mass of TB's to) is working on ways to
improve their performance on SLIP
This is probably Van Jacobson's CSLIP (SLIP + header compression), the
beta version of which has been available for more than half a year
(from ftp.ee.lbl.gov). I believe the header compression is supposed
to make single character TCP/IP packets much smaller, hopefully small
enough to fit into one of Telebit's micro-short packets, rather than
requiring a largely unused 256 byte long packet.
I have CSLIP running on our Sun-3's (SunOS 4.0.3 w/Rayan
Zachariassen's driver for streams). Now, I'm looking for modems.
Questions:
1) Does anyone have any experience running the beta CSLIP on Telebits?
If so, how well does it work (throughput and interactivity) and with
what models, settings, etc?
2) Will SLIP's successor, PPP, have different modem requirements?
3) Does CSLIP beta work with SunOS 4.1?
4) The System V streams stuff in SunOS 4.0 slowed down the serial
ports considerably. How much CPU horsepower does it take to service a
port around 9600 or 19.2K? Is SunOS 4.1 any better?
Thanks,
Jim Helman
Department of Applied Physics Durand 012
Stanford University FAX: (415) 725-3377
(jim@KAOS.stanford.edu) Voice: (415) 723-9127