From owner-freebsd-questions@FreeBSD.ORG Wed May 23 23:51:38 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id AC17F16A400 for ; Wed, 23 May 2007 23:51:38 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from mail-out3.apple.com (mail-out3.apple.com [17.254.13.22]) by mx1.freebsd.org (Postfix) with ESMTP id 9779E13C458 for ; Wed, 23 May 2007 23:51:38 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from relay6.apple.com (relay6.apple.com [17.128.113.36]) by mail-out3.apple.com (Postfix) with ESMTP id E529B1F42A4; Wed, 23 May 2007 16:51:04 -0700 (PDT) Received: from relay6.apple.com (unknown [127.0.0.1]) by relay6.apple.com (Symantec Mail Security) with ESMTP id 6C1B81006B; Wed, 23 May 2007 16:51:38 -0700 (PDT) X-AuditID: 11807124-a32bbbb000001b27-f6-4654d38a4134 Received: from [17.214.13.96] (cswiger1.apple.com [17.214.13.96]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by relay6.apple.com (Apple SCV relay) with ESMTP id 53CD310046; Wed, 23 May 2007 16:51:38 -0700 (PDT) In-Reply-To: <20070524002543.7f6d6b34@gumby.homeunix.com> References: <20070517152529.GA15636@tigger.digitaltorque.ca> <20070520011025.GX11625@tigger.digitaltorque.ca> <20070524002543.7f6d6b34@gumby.homeunix.com> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <404317EA-2E8C-45CD-9418-6493610D4D69@mac.com> Content-Transfer-Encoding: 7bit From: Chuck Swiger Date: Wed, 23 May 2007 16:51:37 -0700 To: RW X-Mailer: Apple Mail (2.752.2) X-Brightmail-Tracker: AAAAAA== Cc: freebsd-questions@freebsd.org Subject: Re: looking for ethernet errors, collisions X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 May 2007 23:51:38 -0000 On May 23, 2007, at 4:25 PM, RW wrote: >> Well, there are plenty there on my sis0 interface (internal). >> >> [msoulier@kanga ~]$ netstat -i >> Name Mtu Network Address Ipkts Ierrs Opkts >> Oerrs Coll >> sis0 1500 00:0a:e6:4a:56:c2 37989565 3980 36808783 >> 5749 6492857 >> sis0 1500 192.168.1 kanga 12380344 - >> 9255757 - > > What are collisions in this context? > > Traditional ethernet collisions aren't possible on modern hardware, > since there's never more than one output writing to each twisted-pair. Even though all modern NICs will happily do full-duplex operation when connected via a switch, people still use hubs rather than switches, sometimes.... :-) You can still get ethernet collisions on a hub. > netstat -i on my desktop PC shows collisions on the ppp tun0 > interface. I haven't a clue what that means. I admit that this one is a bit puzzling to me, too. -- -Chuck