From owner-freebsd-net@FreeBSD.ORG Wed Jul 6 21:47:46 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A77CC1065670 for ; Wed, 6 Jul 2011 21:47:46 +0000 (UTC) (envelope-from davidch@broadcom.com) Received: from mms2.broadcom.com (mms2.broadcom.com [216.31.210.18]) by mx1.freebsd.org (Postfix) with ESMTP id 666FA8FC13 for ; Wed, 6 Jul 2011 21:47:46 +0000 (UTC) Received: from [10.9.200.131] by mms2.broadcom.com with ESMTP (Broadcom SMTP Relay (Email Firewall v6.3.2)); Wed, 06 Jul 2011 14:52:19 -0700 X-Server-Uuid: D3C04415-6FA8-4F2C-93C1-920E106A2031 Received: from IRVEXCHCCR01.corp.ad.broadcom.com ([10.252.49.30]) by IRVEXCHHUB01.corp.ad.broadcom.com ([10.9.200.131]) with mapi; Wed, 6 Jul 2011 14:47:35 -0700 From: "David Christensen" To: "pyunyh@gmail.com" Date: Wed, 6 Jul 2011 14:47:24 -0700 Thread-Topic: bce packet loss Thread-Index: Acw8JYlqG+cpsl5GQESfGwNh3KE5lwAAE8lg Message-ID: <5D267A3F22FD854F8F48B3D2B523819385C32D912B@IRVEXCHCCR01.corp.ad.broadcom.com> References: <20110706201509.GA5559@michelle.cdnetworks.com> <5D267A3F22FD854F8F48B3D2B523819385C32D9115@IRVEXCHCCR01.corp.ad.broadcom.com> <20110706214016.GB5559@michelle.cdnetworks.com> In-Reply-To: <20110706214016.GB5559@michelle.cdnetworks.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-cr-hashedpuzzle: AYMA DXBL FujJ IECB JPNI JYy9 Mpjt OJ9+ O9p/ Prdt Wky7 Xgxy b7R+ hPFc jpaF qmaK; 4; ZABhAHYAaQBkAGMAaABAAGYAcgBlAGUAYgBzAGQALgBvAHIAZwA7AGYAcgBlAGUAYgBzAGQALQBuAGUAdABAAGYAcgBlAGUAYgBzAGQALgBvAHIAZwA7AHAAeQB1AG4AeQBoAEAAZwBtAGEAaQBsAC4AYwBvAG0AOwBzAHAAbwByAGsAQABiAHcAYQB5AC4AbgBlAHQA; Sosha1_v1; 7; {45DA51BE-6966-479E-97CC-E853A6819681}; ZABhAHYAaQBkAGMAaABAAGIAcgBvAGEAZABjAG8AbQAuAGMAbwBtAA==; Wed, 06 Jul 2011 21:47:24 GMT;UgBFADoAIABiAGMAZQAgAHAAYQBjAGsAZQB0ACAAbABvAHMAcwA= x-cr-puzzleid: {45DA51BE-6966-479E-97CC-E853A6819681} acceptlanguage: en-US MIME-Version: 1.0 X-WSS-ID: 620A069962O20352548-01-01 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Cc: Charles Sprickman , David Christensen , "freebsd-net@freebsd.org" Subject: RE: bce packet loss X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Jul 2011 21:47:46 -0000 > > > Data sheet says IfHCInBadOctets indicates number of octets received > > > on the interface, including framing characters for packets that > > > were dropped in the MAC for any reason. > > > > The IfHcInBadOctets counter says the controller received X bytes > > that were bad on the wire (collisions, FCS errors, etc.). A value >=20 > I thought that too. But other counters such as FCS, FAE, Collisions, > Jabbers were all zero. >=20 Also includes frames dropped due to an incorrect destination MAC address (i.e. perfect MAC filter mismatch). This means the NIC=20 received a unicast frame for a MAC address that doesn't match the NIC's MAC address. Very common on a hub and occurs occasionally on switches as well. Dave