From owner-freebsd-questions@FreeBSD.ORG Thu Dec 14 07:30:46 2006 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 D026316A415 for ; Thu, 14 Dec 2006 07:30:46 +0000 (UTC) (envelope-from mksmith@adhost.com) Received: from mail-in08.adhost.com (mailnat.adhost.com [216.211.128.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id B150E43CB1 for ; Thu, 14 Dec 2006 07:29:12 +0000 (GMT) (envelope-from mksmith@adhost.com) Received: from ad-exh01.adhost.lan (unknown [216.211.143.69]) by mail-in08.adhost.com (Postfix) with ESMTP id 964578FC71; Wed, 13 Dec 2006 23:30:45 -0800 (PST) (envelope-from mksmith@adhost.com) Received: from [24.17.246.20] ([10.142.3.172]) by ad-exh01.adhost.lan with Microsoft SMTPSVC(6.0.3790.1830); Wed, 13 Dec 2006 23:30:45 -0800 In-Reply-To: <20061214011324.GF79418@dan.emsphone.com> References: <20061214010124.29818.qmail@web34502.mail.mud.yahoo.com> <20061214011324.GF79418@dan.emsphone.com> Mime-Version: 1.0 (Apple Message framework v752.3) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Michael Smith Date: Wed, 13 Dec 2006 23:30:43 -0800 To: Dan Nelson X-Mailer: Apple Mail (2.752.3) X-OriginalArrivalTime: 14 Dec 2006 07:30:45.0442 (UTC) FILETIME=[C4977220:01C71F51] Cc: "N. Harrington" , freebsd-questions@freebsd.org Subject: Re: How does one bond two interfaces together to share bandwidth? 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: Thu, 14 Dec 2006 07:30:46 -0000 Hello: On Dec 13, 2006, at 5:13 PM, Dan Nelson wrote: > In the last episode (Dec 13), N. Harrington said: >> I am trying to figure out how to bond or combine 2 interfaces >> together. Such that they each share traffic. >> >> I have tried one way, however when I use it I seem to have an odd >> broadcast occuring on my switch. Such that I am seeing incoming >> traffic hit some other ports on the switch. Can someone confirm if I >> am doing it correctly? Perhaps I have a switch issue? Do I also need >> to bond the ports together on the switch? Sadly the switch they are >> connected to does not support port bonding. Does that matter? I have >> not seen any mention of that being required. > > If the remote switch doesn't support it, only outgoing traffic will be > split across both ports. Incoming traffic will probably come in on > the > first port that came up, or the switch may decide that there's a > routing loop (or other misconfiguration) because the same MAC address > is seen on both ports, and disable one of the ports (or even both). > Most managed switches should support it; they may call it trunking. Both sides need to support EtherChannel which is 802.3ad (although Cisco does have a proprietary variant (go figure)). If only one side is set to channel and the other side is not, the non-channeled side will detect a loop and set one of the ports into blocking state; that is, if it's Spanning Tree aware. If it's a consumer-grade switch or hub, the network will do the functional equivalent of a Bill the Cat face and fall over most dramatically. Regards, Mike