From owner-freebsd-stable@FreeBSD.ORG Wed Jan 24 18:54:04 2007 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id F363B16A402 for ; Wed, 24 Jan 2007 18:54:03 +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 DE0B913C45D for ; Wed, 24 Jan 2007 18:54:03 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from relay8.apple.com (relay8.apple.com [17.128.113.38]) by mail-out3.apple.com (8.13.8/8.13.8) with ESMTP id l0OIOCda020864; Wed, 24 Jan 2007 10:24:12 -0800 (PST) Received: from relay8.apple.com (unknown [127.0.0.1]) by relay8.apple.com (Symantec Mail Security) with ESMTP id 722A840028; Wed, 24 Jan 2007 10:24:12 -0800 (PST) X-AuditID: 11807126-a2682bb000000245-75-45b7a44cab73 Received: from [17.214.13.96] (unknown [17.214.13.96]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by relay8.apple.com (Apple SCV relay) with ESMTP id 645D840025; Wed, 24 Jan 2007 10:24:12 -0800 (PST) In-Reply-To: <45B751E0.5080907@mail.ru> References: <45B751E0.5080907@mail.ru> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Chuck Swiger Date: Wed, 24 Jan 2007 10:24:11 -0800 To: Ilia Gorstkin X-Mailer: Apple Mail (2.752.2) X-Brightmail-Tracker: AAAAAA== Cc: freebsd-stable@freebsd.org Subject: Re: arp: unknown hardware address format X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jan 2007 18:54:04 -0000 On Jan 24, 2007, at 4:32 AM, Ilia Gorstkin wrote: > I'm having trouble with arp: > arp: unknown hardware address format (0x4500) > and > arp: unknown hardware address format (0x4242) > these messages fall on the console in a plenty. > > I do tcpdump -exn "arp[0]=0x45 and arp[1]=0": > > tcpdump: verbose output suppressed, use -v or -vv for full protocol > decode > listening on xl0, link-type EN10MB (Ethernet), capture size 68 bytes Please run "tcpdump -exxn -s 0 arp" to show the full packets including link-layer headers. You should be seeing a byte sequence more like: 0001 0800 0604 0001 ...followed by the sender's MAC address. This is from /usr/include/net/if_arp.h and means: ARPHRD_ETHER, ETHERTYPE_IP, hln=6, pln=4, ARPOP_REQUEST I don't know what 0x4500 means, but 0x4242 is: #define ETHERTYPE_PCS 0x4242 /* PCS Basic Block Protocol */ It seems more likely that you've got a hardware problem like a wacked out NIC or switch, or some really odd software bug... -- -Chuck