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Date:      Tue, 22 May 2001 10:06:06 -0700
From:      "Kevin Oberman" <oberman@es.net>
To:        "Mike Oligny" <moligny@kanotech.com>
Cc:        "C J Michaels" <cjm2@27in.tv>, "FreeBSD Questions" <freebsd-questions@FreeBSD.ORG>
Subject:   Re: Network Collisions 
Message-ID:  <200105221706.f4MH66c32206@ptavv.es.net>
In-Reply-To: Your message of "Tue, 22 May 2001 09:54:06 MDT." <76928F3E231DE4478876350F08358336044A86@kt-exchange.edmonton.kanotech.net> 

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If you have collisions on the output of netstat -i, the interface is
half duplex. Among other things, full-duplex operation MUST disable
collision detection. 

Typical duplex mis-match indicator is that one side of the connection
has zero collisions but shows framing or other data errors and the
other end shows many collisions and other errors; esp. late
collisions.

R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634

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