dyer@spdcc.COM (Steve Dyer) (10/10/90)
I think your problems are more to do with the nature of your modems
than any inherent problems with medium speed SLIP links. I lived for
two years quite happily with a LADS circuit supporting a full time
point-to-point SLIP connection running at 19.2kb. No fancy modems,
just a pair of local data sets. 19.2kb SLIP is subjectively quite
reasonable, and I found that even on a heavily loaded line supporting
NNTP, a couple of telnet/rlogin sessions, regular SMTP traffic and the
occasional FTP, the delay wasn't all THAT bad.
All bets are off when you start talking about pseudo-full-duplex modems
like Telebit Trailblazers or MNP6, or noisy lines or lossy serial interfaces.
But let's identify *these* as potential areas of problems, and not tar
the underlying technology unjustly.
--
Steve Dyer
dyer@ursa-major.spdcc.com aka {ima,harvard,rayssd,linus,m2c}!spdcc!dyer
dyer@arktouros.mit.edu, dyer@hstbme.mit.edubob@MorningStar.Com (Bob Sutterfield) (10/10/90)
In article <4401@spdcc.SPDCC.COM> dyer@spdcc.COM (Steve Dyer) writes:
All bets are off when you start talking about pseudo-full-duplex
modems like Telebit Trailblazers or MNP6, or noisy lines or lossy
serial interfaces. But let's identify *these* as potential areas
of problems, and not tar the underlying technology unjustly.
We see very reasonable performance with compressed-header SLIP or PPP
between Sun-4/60s over a pair or Trailblazer Plusses: 1.3-1.5Kb/sec
FTP throughput with PPP, nearing the modem's advertised pipe diameter.
Interactive response OK too, though not what you'd call "pleasant" if
you're used to fatter hoses. I haven't tried high values of MNP or
HST.
Don't bother with Classic SLIP, particularly not with TBs.DRJ100@psuvm.psu.edu (Daniel R. Jeuch) (10/11/90)
In article <BOB.90Oct10095447@volitans.MorningStar.Com>, bob@MorningStar.Com (Bob Sutterfield) says: > >We see very reasonable performance with compressed-header SLIP or PPP >between Sun-4/60s over a pair or Trailblazer Plusses: 1.3-1.5Kb/sec >FTP throughput with PPP, nearing the modem's advertised pipe diameter. >Interactive response OK too, though not what you'd call "pleasant" if >you're used to fatter hoses. I haven't tried high values of MNP or >HST. > >Don't bother with Classic SLIP, particularly not with TBs. Unfortunately, here at Penn State, all we have is MNP5 9600 V.32 dial-in lines... I get throughput with classic SLIP (PSU also doesn't use compression) of somewhere between .8-.9kb/sec. Not great, but it's free for Penn State students... (Kind of important for my budget!) TN3270 does suffer, though! ----- Daniel R. Jeuch Microsoft Corp. Student Rep. 10 Vario Blvd., Box 185 DRJ100@PSUVM, drj100@psuvm.psu.edu State College, PA 16803 (814) 867-4622, (800) 232-5129