From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io1-xd2f.google.com (mail-io1-xd2f.google.com [IPv6:2607:f8b0:4864:20::d2f]) (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 5F4A33B2A4; Tue, 9 Mar 2021 15:39:04 -0500 (EST) Received: by mail-io1-xd2f.google.com with SMTP id p16so15466355ioj.4; Tue, 09 Mar 2021 12:39:04 -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=GVAGeWg6XsRjUaRJD61DYxUa7s824hSAmjpfgaj/9dg=; b=E5NCOTzH75dBEP5FnH7HLaSJ69WoPAKgC7eFljQTd6qce0UmLMQtwccYFDXaPjhL6J NZz2zXNm8VpfFmXq6csSYYRVxACr5Voz+vmm9S3k9qimpbLz+ecr2JMm/jR/TrZtGk9O 3UT2bRdZHc/Eeww9QZpBs71NcQyzyxoGGZPHpFdMVVt1T8b582IzQZB7W41AdWJFW0eD FjlINeEKaV9n9/vGqZrg6p5lkdnXjpOEmLWqSDQyJsNhRlAYdNdKpHGTu9qnenQWfXwv 7uoQHGHvDQP4IGUPZrWBKIM7dVQiZbyb0yN/7+gDM3nZIsXO9TUYcKpIH2eww5Ykx0TX 91eQ== 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=GVAGeWg6XsRjUaRJD61DYxUa7s824hSAmjpfgaj/9dg=; b=jx7oPq2BGQ44alkZvTac0qtO2MnIaXFW0jVPqtbflRxtcxFIjpnk9qH5LVPKEKuoRm ymzTRQQkODcx5eQF+ipNtmFudxCLAQbh+i/X1hljFveWuBZfHLuqTd9c9TN6KbLVMPW3 Gfl1lfa9wonU/u7R1h9lwgN11H+WsbjkRgK+GB/pbwbP7q9Q1wOC175ghEjY35rSur7S 4QdpNCeI3kkpS8dnpCtrX1ruzalaKjH38W7ZafDP9SiR4ZOk5TCCwyGdlgF9lpraks34 N9OrAgxIPwhfNBG2md0a1vIB7rn8FMzpknP9P7SA2l5pVWGflCIzAZqE49fgeBmJ2BlP +eVg== X-Gm-Message-State: AOAM530RUNXsg3RZXoDHHcif5GIXyfp9hPXVojbHBFOArV0qbgcxykwL xm+yJvurz0vQCntmm2W4tB5gPTj85HCDLUI2bWdgCy+AQUAqVQ== X-Google-Smtp-Source: ABdhPJyGlYh5zRl4PHBiTyM9sxULbZ8rABs8KkyGkXLeGM86EdqFp/f8fg3UVfn6EUTRK1bHQM7rx/PCxPbr6NOnCAs= X-Received: by 2002:a5d:9641:: with SMTP id d1mr23884878ios.123.1615322343562; Tue, 09 Mar 2021 12:39:03 -0800 (PST) MIME-Version: 1.0 From: Dave Taht Date: Tue, 9 Mar 2021 12:38:52 -0800 Message-ID: To: ECN-Sane , bloat , Make-Wifi-fast , cerowrt-devel , Cake List , tsvwg IETF list Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [Make-wifi-fast] how to ecn again on osx and ios!!! X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Mar 2021 20:39:04 -0000 The additional sysctl required to re-enable ecn negotiation always is sudo sysctl -w net.inet.tcp.disable_tcp_heuristics=3D1 See also: https://github.com/apple-opensource/xnu/blob/master/bsd/netinet/tcp_cache.c= #L164 It disables mptcp and tfo, which for purposes of even basic worldwide testing of the survival of the ect(0) and ect(1) codepoints, don't really matter. I am delirious with joy to be able to test this stuff again from devices more people have, and I hope y'all turn it on for a while, on ethernet/wifi and lte, get a bunch of captures and see what happens in day to day use. I would so love packet captures from many many vantage points against the worldwide flent testing network. Those of you that have root access on your iphones can also test ecn in this way. A huge thanks to Christoph Paasch over at apple for pointing this out. --=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