From owner-freebsd-net@FreeBSD.ORG Tue Aug 4 18:59:59 2009 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 111BC106564A; Tue, 4 Aug 2009 18:59:59 +0000 (UTC) (envelope-from delphij@delphij.net) Received: from tarsier.delphij.net (delphij-pt.tunnel.tserv2.fmt.ipv6.he.net [IPv6:2001:470:1f03:2c9::2]) by mx1.freebsd.org (Postfix) with ESMTP id 95EB48FC0C; Tue, 4 Aug 2009 18:59:58 +0000 (UTC) (envelope-from delphij@delphij.net) Received: from tarsier.geekcn.org (tarsier.geekcn.org [211.166.10.233]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by tarsier.delphij.net (Postfix) with ESMTPS id A1DD75C024; Wed, 5 Aug 2009 02:59:57 +0800 (CST) Received: from localhost (tarsier.geekcn.org [211.166.10.233]) by tarsier.geekcn.org (Postfix) with ESMTP id 397BA55CDAFE; Wed, 5 Aug 2009 02:59:57 +0800 (CST) X-Virus-Scanned: amavisd-new at geekcn.org Received: from tarsier.geekcn.org ([211.166.10.233]) by localhost (mail.geekcn.org [211.166.10.233]) (amavisd-new, port 10024) with ESMTP id ZLSdyHeYZJAp; Wed, 5 Aug 2009 02:58:58 +0800 (CST) Received: from charlie.delphij.net (adsl-76-237-33-62.dsl.pltn13.sbcglobal.net [76.237.33.62]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by tarsier.geekcn.org (Postfix) with ESMTPSA id BBF2E55CD9BB; Wed, 5 Aug 2009 02:58:51 +0800 (CST) DomainKey-Signature: a=rsa-sha1; s=default; d=delphij.net; c=nofws; q=dns; h=message-id:date:from:reply-to:organization:user-agent: mime-version:to:cc:subject:references:in-reply-to: x-enigmail-version:openpgp:content-type:content-transfer-encoding; b=BlFfasxgQTz3L9bIaeE6B3dZX9J9IrCMCNbnWz3DllIe1vUUZGs/sd0S/Ajrv5voc hCMdbhJbAJlBWMYrtNarQ== Message-ID: <4A7884DA.2020006@delphij.net> Date: Tue, 04 Aug 2009 11:58:34 -0700 From: Xin LI Organization: The FreeBSD Project User-Agent: Thunderbird 2.0.0.22 (X11/20090803) MIME-Version: 1.0 To: "Li, Qing" References: <4A773D09.3030404@delphij.net> In-Reply-To: X-Enigmail-Version: 0.95.7 OpenPGP: id=18EDEBA0; url=http://www.delphij.net/delphij.asc Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Jack F Vogel , freebsd-net@freebsd.org, d@delphij.net Subject: Re: em(4): sending ARP regardless of NOARP flag X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: d@delphij.net List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Aug 2009 18:59:59 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Li, Qing wrote: > Is this on -CURRENT ? No, it's 7.2-RELEASE-p2. > --Qing > > >> -----Original Message----- >> From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd- >> net@freebsd.org] On Behalf Of Xin LI >> Sent: Monday, August 03, 2009 12:40 PM >> To: Jack F Vogel >> Cc: freebsd-net@freebsd.org >> Subject: em(4): sending ARP regardless of NOARP flag >> > Hi, Jack, > > I have observed that, even if -arp is specified when adding an IP > address to the em(4) interface, an ARP request is still being sent. > Here is a tcpdump from my network environment: > > 11:15:01.370256 00:13:72:66:b5:d7 > ff:ff:ff:ff:ff:ff, ethertype ARP > (0x0806), length 60: Request who-has *.*.152.120 tell *.*.152.120, > length 46 > 11:15:01.370270 00:15:17:92:39:0e > 00:13:72:66:b5:d7, ethertype ARP > (0x0806), length 42: Reply *.*.152.120 is-at 00:00:5e:00:01:07, length > 28 > > (The first ARP request was sent from a Dell branded Intel 82541EI >> based > NIC, the latter is from a cheaper server that is part of CARP > configuration which is unrelated to the problem in response to the ARP > request) > > I was originally under the impression that there is some bug in our >> ARP > code but with a bce(4) card, the problem does not exist. After a > glance > at e1000 driver code, it looks like that the e1000 NIC has a feature >> of > hardware interception of ARP, can this be somehow connected? The > hardware in question is 82541EI based: > > em1@pci0:7:8:0: class=0x020000 card=0x016d1028 chip=0x10768086 > rev=0x05 > hdr=0x00 > vendor = 'Intel Corporation' > device = '82541EI Gigabit Ethernet Controller' > class = network > subclass = ethernet > > Thanks in advance! > > Cheers, _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" - -- Xin LI http://www.delphij.net/ FreeBSD - The Power to Serve! -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iEYEARECAAYFAkp4hNkACgkQi+vbBBjt66Bo0ACbBWVUdrEmwqaiRUYmezoMukqA lskAnRPsFHa+BssSt4sBnPDKDhj+sczw =dKzv -----END PGP SIGNATURE-----