Path: utzoo!attcan!uunet!lts!amanda
From: amanda@lts.UUCP (Amanda Walker)
Newsgroups: comp.protocols.appletalk
Subject: Re: tweaking NCSA Telnet's ftp performance?
Message-ID: <720@lts.UUCP>
Date: 10 Nov 88 15:26:20 GMT
References: <30734@think.UUCP>
Organization: InterCon Corporation, Reston, VA
Lines: 30

In article <30734@think.UUCP>, ephraim@think.COM (Ephraim Vishniac) writes:
  [Kinetics EtherPort II]
> As soon as we got a card installed, I tried some sample transfers to
> check performance.  The default settings (mtu = 512, maxseg = 512,
> rwin = 512) gave me 4.2KB/S.  Opening the window all the way (rwin =
> 4096) tripled that figure to 13KB/S.  (This is under system software
> 6.0.2, without MultiFinder since it seems cripple ftp performance.)
> Unfortunately, the manual isn't very informative about the maximum
> values for mtu and maxseg in the absence of a Kinetics gateway.

For hosts sitting on your Ethernet, you can bump the mtu and maxseg to 1024.
This won't work for going across the internet, though, since NCSA
telnet can't handle fragmentation.  Also, since 6.0.2 provides the
WaitNextEvent trap, telnet thinks it's under MultiFinder.  Setting
timeslice=0 should tweak things up a little bit.

Something that may be a limiting factor about the EtherPort II is that
it uses the Intel Ethernet chip, which does not handle collisions or
back-to-back packets very well.

> 1. Is there an NCSA Telnet 2.2e?

2.2 handles both LocalTalk and Ethernet.  if you put 'hardware=ether'
in your config.tel, it will use your EtherPort II.

-- 
Amanda Walker
InterCon Corporation, 11732 Bowman Green Drive, Reston, VA 22090

...!uunet!lts!amanda / lts!amanda@uunet.uu.net