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From: BILLW@mathom.cisco.com (WilliamChops Westfield)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: SLIP on STS-10X terminal servers
Message-ID: <34209@boulder.Colorado.EDU>
Date: 16 Apr 91 00:33:32 GMT
Sender: daemon@boulder.Colorado.EDU
Lines: 21

Using a TCP connection (sun sending to port 40xx of a terminal server),
the csc/3, csc/2 and sts10 have aggregate data rates (apparently interrupt
limited) of about 60k, 30k, and 12k bytes/sec, respectively.  This is
essentially the same for telnet doing output to the screen.  SLIP
uses a rather different interrupt handler, and its performance has not
been measured.  It should be somewhat faster...

The next release of software (8.3) will support some odd baud rates
including 14.4kbps and 57.6kbps (with the same overall throughput).

It will also support NCD's "Xremote" X compression protocol, which
makes X rather nice even over a 9.6kbps link.

While some TS vendors advertise the ability to operate all lines at
max speed in both directions concurrently, what this generally means
is that they are vastly over-engineered for the normal operating point
of a terminal server...

Bill Westfield
cisco Systems.
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