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Date:      Wed,  1 Sep 1999 10:15:00 -0400 (EDT)
From:      Andrew Gallatin <gallatin@cs.duke.edu>
To:        Phil Regnauld <regnauld@ftf.net>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: Testing gigabit NIC/ switches and 3C985B-SX support
Message-ID:  <14285.13363.795038.838208@grasshopper.cs.duke.edu>
In-Reply-To: <19990901160814.23604@ns.int.ftf.net>
References:  <19990901160814.23604@ns.int.ftf.net>

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Phil Regnauld writes:
 > 	[a bit off-topic]
 > 
 > A colleague of mine is using 3Com 9300 SSII gigabit switches
 > in tandem with 3C985B-SX 1000baseSX NICs (we don't support those, do we ?)
 > 
 > Using NT (Compaq PII-400 boxes) they get 132~133 Mbit/s (tested with netperf),
 > thorough the switch.
 > 
 > 3Com has drivers for Linux (2.1.131), but I wonder if Linux would
 > be realistic enough for this kind of tests -- any suggestions ?
 > 
 > 131 seems a bit low -- I've heard of 250-300 Mbit/s on that kind of hardware
 > (maybe not with NT :-)
 > 

These should be supported using the tigon driver (if_ti).  You can
expect about 2-3x this level of performance from FreeBSD.  Perhaps even
more if you can use "jumbo" (aka 9000 byte) frames.  Does this 3Com
9300 SSII switch support jumbo frames?


Cheers,

Drew

------------------------------------------------------------------------------
Andrew Gallatin, Sr Systems Programmer	http://www.cs.duke.edu/~gallatin
Duke University				Email: gallatin@cs.duke.edu
Department of Computer Science		Phone: (919) 660-6590


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