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perle jetstream settings

Marion Hakanson hakansom@ohsu.edu
Fri, 11 Aug 2006 14:31:10 -0700 (PDT)


I'm a long-time conserver user, and a long-time terminal-server user,
but this is the first time I've used conserver with a terminal-server.
We're setting conserver up to connect to a Perle JetStream 8548 in
reverse-telnet mode.  Our console master host platform is Solaris-10
on both Sun Blade 150 and also Solaris-10_x86 on a P4 PC.

One thing I've noticed is that reverse telnet connections seem to have
very bursty output on this unit.  Instead of a steady stream of characters
that a direct (hardwired) serial connection gives, you get a batch of
characters (maybe 4-5 lines of text) in a quick burst, pause, then another
batch, etc.  This happens when using both conserver and plain old telnet
to connect to a port, so it's nothing wrong with conserver itself.

As I said, I've used terminal servers for years, but this is my first
experience with the JetStream product.  We also have an old IOLAN+ Rack
unit, and the IOLAN+ does not exhibit this bursty output behavior, even
when given the same serial-line output from identical hardware.  The Perle
seems to behave the same when the port is in "reverse raw" mode and conserver
is set with the "protocol raw" option to match.

We're running ports at 9600bps almost without exception, and no serial
flow control is in effect at this time.  Network gear is all switched
10/100, operating at 100Mbps (except for the IOLAN+).  I'm wondering if
folks have guidance as to settings that one can tune on either the
JetStream or on the Solaris side to give smoother serial output with
this arrangement.

Thanks and regards,