From owner-freebsd-stable@FreeBSD.ORG Fri Feb 4 15:55:59 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 6A776106566B for ; Fri, 4 Feb 2011 15:55:59 +0000 (UTC) (envelope-from fjwcash@gmail.com) Received: from mail-qw0-f54.google.com (mail-qw0-f54.google.com [209.85.216.54]) by mx1.freebsd.org (Postfix) with ESMTP id 1A13D8FC0C for ; Fri, 4 Feb 2011 15:55:58 +0000 (UTC) Received: by qwj9 with SMTP id 9so1846882qwj.13 for ; Fri, 04 Feb 2011 07:55:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=UejmoZ0h44TQ2gxxByl4X7YKNoVvndkuy8FRLTNravU=; b=csTbflSGDwAM+tn0gnVNZuWkKQJ8Kor48PMctU/dBe/7E4Njj/IQpkO3iXxWGWkEvd AOohOLVvj57E6a6NmwJU1WJik6ajEkBauqZ+a2H05RGAHRYQ7veYC0J5vkasu9hp+o4s D5iAEZfEYRRcZcyQs8e2FQo2dwclzpf/g0wQA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=DpZFikvFukG/3X9geik1AjNmJ9/mJ75ZxhA/J6t7W2KswZuezcXIdB1p8yiR0jkpK1 lj3lmdh0s3sihZ+LwUmoUIDrNr3bQeRatRnggX1qRVbqhqVxoOT1UUs+V/Qft0ZXXLzi OFIUxwZX53+0D/w0mSXNrCgH/toc6e2o+okag= MIME-Version: 1.0 Received: by 10.229.211.6 with SMTP id gm6mr8695466qcb.112.1296834957707; Fri, 04 Feb 2011 07:55:57 -0800 (PST) Received: by 10.229.186.68 with HTTP; Fri, 4 Feb 2011 07:55:57 -0800 (PST) In-Reply-To: <4D4BED80.5060806@my.gd> References: <4D4BED80.5060806@my.gd> Date: Fri, 4 Feb 2011 07:55:57 -0800 Message-ID: From: Freddie Cash To: Damien Fleuriot Content-Type: text/plain; charset=UTF-8 Cc: "freebsd-stable@freebsd.org" 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 15:55:59 -0000 On Fri, Feb 4, 2011 at 4:13 AM, Damien Fleuriot wrote: > I have a firewall with 2x Intel pro dual port cards. > > On Intel A , port 1 goes to switch 1, port 2 goes to switch 2 > On Intel B , port 1 goes to switch 1, port 2 goes to switch 2 > > I have created the following 2 lagg devices using LACP: > > lagg0 = A1 + B1 > lagg1 = A2 + B2 > > This works fine. > > Now, what I had in mind was creating a lagg2 device using lagg0 and > lagg1 with failover. > > That would provide redundancy in case of a switch failure. Couple different options: - create a single lagg0 device using all port NIC ports - create your lagg0 using A1 + B2, and your lagg1 using A2+B1 Both of those will give you fail-over support for losing a single NIC port, an entire NIC, or an entire switch. Of course, if your switched aren't stacked to support LACP across them, then you will be limited to a single links bandwidth. But you will be extremely safe. :) -- Freddie Cash fjwcash@gmail.com