From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 37C493B2A4 for ; Mon, 11 Mar 2019 21:04:41 -0400 (EDT) Received: by mail-pf1-x434.google.com with SMTP id v21so507804pfm.12 for ; Mon, 11 Mar 2019 18:04:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=gGKMgwX6HqCG1xlabN3xBde81G9u7qSOqsP+o/2yVbM=; b=F5pMvs1ABQFKuz2NvDJsp2D3ZZtieV+YyyqYA5FksNe+w1swyD/stByEDG9skNS75K OK0CV+rd5Udlw+9apxKDBln34hQRB+M4ryBw+HXSa/kZ1pQ81Yxj9GTJw8ScoutlqMeE 7I/73WitSBUNrZ3hZMXCFOpUcGpPsH/E2psyQV/JYEwaJ7ge6P/fAtI4+KcO8cYjG6Jv TsW2ii6PuUzJIqH/gJYakPPzBmsY4vomzBHAADVlj0EFesljC4TDE6adIqEUZH92K9Ws NO0e447q+QoVOD0AmJbZUo8mK49HU/6vkoYFUHHIDapgkiJKaBS0iQ8f7SgzPkqxxFWG Mf1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=gGKMgwX6HqCG1xlabN3xBde81G9u7qSOqsP+o/2yVbM=; b=Q0cRnSvHWam//+wj6BtZe2TjUbMgx1OMuKpW5YrLyq1FDV7s4iXw3Y+JKMlOaFsgEV DkB9DrEtNa5XcYgy5+MNiG8ZSopyWHi1riam4+vv9p1Rtf9f38GtYSsFAvwnQSLwDJHn 4UGwW0rg32ytgKpAwBN8y+KixPA8AjhIpHX23t+pSWYHhUBztQvOhNn0/ZP5eLpTZep3 vs15tzk5Pp4VbIauhH1fYfFdkPanndx4LUXIlDwbBznisP5+labdC8Drm9T6HRijYuuC 9cfgxubUGllKxZorF5mJto1ebl6wguCu2xsQmhvkQwXSEZi14ekMx1omPwyqTV+R4lLy 5DnQ== X-Gm-Message-State: APjAAAWi89ZEz84KvatS1wLijadT0dKJQROxo6xSgUprAsBqTd60Zx8n +mBqouQUWzQHaPWtxnoBvdwTfR8hRI+73w== X-Google-Smtp-Source: APXvYqxJfXFxgZZyc0t7HrZ6GLrJ8G2a+WvMvhFZ6oCP55Hcz+wPFOBlegzmfkmLInyJ4BQ+Uw25eg== X-Received: by 2002:a63:1766:: with SMTP id 38mr32706848pgx.204.1552352679943; Mon, 11 Mar 2019 18:04:39 -0700 (PDT) Received: from shemminger-XPS-13-9360 (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id o2sm13509656pgq.29.2019.03.11.18.04.39 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 11 Mar 2019 18:04:39 -0700 (PDT) Date: Mon, 11 Mar 2019 18:04:37 -0700 From: Stephen Hemminger To: Dev Cc: bloat Message-ID: <20190311180437.6ddd1948@shemminger-XPS-13-9360> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [Bloat] transparenty bridge/tap with fq_codel X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Mar 2019 01:04:41 -0000 On Mon, 11 Mar 2019 16:01:36 -0700 Dev wrote: > I built a transparent bridge on a Debian platform earlier running fq_code= l between eth2 and eth3 as br0 which seemed to improve throughput.=20 >=20 > Now, I=E2=80=99m wondering if there=E2=80=99s a way to copy some of those= packets to another onboard NIC eth4 for analysis on another box on the net= work. How significant of a performance hit will this be on commodity hardwa= re on my bridge throughput, and/or what is best practices? Has anyone alrea= dy done this and made it work? It is possible to do this with ingress qdisc and a mirred filter to mirror = packets to another device. That is the Linux way to create SPAN ports on a = bridge.