From owner-freebsd-stable@FreeBSD.ORG Fri Feb 4 12:19:26 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 565EF106566B for ; Fri, 4 Feb 2011 12:19:26 +0000 (UTC) (envelope-from petefrench@ingresso.co.uk) Received: from constantine.ticketswitch.com (constantine.ingresso.co.uk [IPv6:2002:57e0:1d4e:1::3]) by mx1.freebsd.org (Postfix) with ESMTP id 1D69E8FC0C for ; Fri, 4 Feb 2011 12:19:26 +0000 (UTC) Received: from dilbert.london-internal.ingresso.co.uk ([10.64.50.6] helo=dilbert.ticketswitch.com) by constantine.ticketswitch.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.73 (FreeBSD)) (envelope-from ) id 1PlKdH-000KKu-7B; Fri, 04 Feb 2011 12:19:23 +0000 Received: from petefrench by dilbert.ticketswitch.com with local (Exim 4.72 (FreeBSD)) (envelope-from ) id 1PlKdH-0000hK-6J; Fri, 04 Feb 2011 12:19:23 +0000 Date: Fri, 04 Feb 2011 12:19:23 +0000 Message-Id: To: freebsd-stable@freebsd.org, ml@my.gd In-Reply-To: <4D4BED80.5060806@my.gd> From: Pete French Cc: Subject: Re: link aggregation - bundling 2 lagg interfaces together 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: Fri, 04 Feb 2011 12:19:26 -0000 If you want failover using lagg then your best bet is to get lagg between two ports on different switches. If you have a pair of switches which will present as a single device then you can use LACP to do this, else use simple failover. I do this for all our servers and it works very nicely. In your setup I am not sure why you are originally lagging the pairs of interfaces to the same switch. Is that to try and increase capacity ? If so then I have never found it to work - all the traffic goes over one interface for me. -pete.