From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-il1-x12d.google.com (mail-il1-x12d.google.com [IPv6:2607:f8b0:4864:20::12d]) (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 AA06E3B29E for ; Sat, 20 Feb 2021 14:27:45 -0500 (EST) Received: by mail-il1-x12d.google.com with SMTP id g9so7487467ilc.3 for ; Sat, 20 Feb 2021 11:27:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to :content-transfer-encoding; bh=mRLJFiCii6nuqTDj0NSMXVdw4TnP+x4ylIsJLdO1JhQ=; b=fF1S/rJE+wWPrGZRIR9BF0R+m5u/fO168J+j1Ozs9zlKXQDGSN4nBqu4gYMymtKLSI oFdDwCczWVJKzBQQ9TWD02pY5rEeyjyy33KRcsfTr7afi7YjW8r7Ls3tLUYVNBZyDs4T n08olhN7QCtuMTuvYu3Sx84sQAUSEQSP+y9j3Z0aYQoQR/5BUhtBzW8Z+A0tllQYoBG3 7WPpxkICNbSJGkZuFCA/HsKZGxphx6T7RFjtW7yqDz5NkuMKmQicmPdaE3eY1t2YkRat uJxtGfs0K4raYl9RIR+Ztuqj8IBPzxujN0PewSPyC0LRiLpgjKN73kjOUlsp9poTRdfe O69w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-transfer-encoding; bh=mRLJFiCii6nuqTDj0NSMXVdw4TnP+x4ylIsJLdO1JhQ=; b=B+hA8zZMOhLHNK82r6yq6tk6rl6TNxxvmh55W9TCbaOx8BTlLd0VU04Zy+za3PQ6od dC+ilv9oM/RBI4PrKziHHjUBpiT7Xre99D/H8W5GFLsg/efEvJWsbdByYR0xhEj8LlAT n2fC+wu/NbOhwUSNJdfyb3uud+GrS0Pb7anFH4xddpleD1f7g1/cTKkMN4RBzd/lGbgO flI8cGq0TVh8QS2e+g/70TJzjJ+FtPzJv9q/uqXND8V8STLHMXdxRZBYrsIUea8M+WHs YET5dnbgTNUDFQFjDY8gX+9WVY7UcxHSQ0Umz98LLkQD9YccAxsDxEae62biwIP7UIoJ 9qEw== X-Gm-Message-State: AOAM531rPENPG2hO25qlP8SD8TVQ+qPJnFIKymB3w28tA5gSMv2D9c7T LxsMV7cTN7KEtlIdchzCYAkCN7fZLQj4BFPuruNQZFl/8vs= X-Google-Smtp-Source: ABdhPJxPOVhVGn+FSETFgLfTryhs9suRDeMrsRmJUDMtiiPrJ8Vh2TlOJsfVpElr+9rCgn/A90RPKud+Z/hqiKvcPRM= X-Received: by 2002:a05:6e02:14cd:: with SMTP id o13mr8470783ilk.0.1613849264768; Sat, 20 Feb 2021 11:27:44 -0800 (PST) MIME-Version: 1.0 From: Dave Taht Date: Sat, 20 Feb 2021 11:27:33 -0800 Message-ID: To: ECN-Sane Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [Ecn-sane] ect(1) queue selector question X-BeenThere: ecn-sane@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussion of explicit congestion notification's impact on the Internet List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 20 Feb 2021 19:27:45 -0000 I note that I have done my best to stay out of this for a while, so long that I (thankfully) mis-remember various aspects of the debate. Today I have a question about l4s vs SCE as it's come up again. l4s uses both a dscp codepoint AND ect(1) to indicate dctcp style congestion control is in use, and also can dump other protocols into that queue lacking any ecn markings. SCE proposes to use ect(1) as an indicator of some congestion and does not explictly require a dscp codepoint in a FQ'd implementation. Do I have that right? Now, my question was, simply, in MPLS or X-G are they out of bits, and that's why they want to use up this one in L4S? --=20 "For a successful technology, reality must take precedence over public relations, for Mother Nature cannot be fooled" - Richard Feynman dave@taht.net CTO, TekLibre, LLC Tel: 1-831-435-0729