From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from emea01-db3-obe.outbound.protection.outlook.com (mail-db3on0076.outbound.protection.outlook.com [157.55.234.76]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "MSIT Machine Auth CA 2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 9F4E421F1F7 for ; Mon, 18 May 2015 01:09:26 -0700 (PDT) Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=kevin@darbyshire-bryant.me.uk; Received: from [IPv6:2001:470:183f:da2b::9b1c:6a15] (2001:470:183f:da2b::9b1c:6a15) by VI1PR07MB0942.eurprd07.prod.outlook.com (25.161.110.147) with Microsoft SMTP Server (TLS) id 15.1.166.22; Mon, 18 May 2015 08:09:19 +0000 Message-ID: <55599E1F.1070105@darbyshire-bryant.me.uk> Date: Mon, 18 May 2015 09:09:03 +0100 From: Kevin Darbyshire-Bryant User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Mikael Abrahamsson References: <55552014.2010808@darbyshire-bryant.me.uk> <5555AB46.5010508@darbyshire-bryant.me.uk> <905D3263-3F21-4BF0-A827-A29E98B8AA8F@darbyshire-bryant.me.uk> In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms010003090903050403050505" X-Originating-IP: [2001:470:183f:da2b::9b1c:6a15] X-ClientProxiedBy: CY1PR13CA0030.namprd13.prod.outlook.com (25.162.30.168) To VI1PR07MB0942.eurprd07.prod.outlook.com (25.161.110.147) X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:VI1PR07MB0942; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(601004)(5005006)(3002001); SRVR:VI1PR07MB0942; BCL:0; PCL:0; RULEID:; SRVR:VI1PR07MB0942; X-Forefront-PRVS: 058043A388 X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10009020)(6009001)(51704005)(199003)(479174004)(189002)(24454002)(33656002)(87976001)(512944002)(83506001)(46102003)(74482002)(92566002)(64126003)(101416001)(59896002)(42186005)(106356001)(99136001)(105586002)(5001960100002)(110136002)(189998001)(5001830100001)(5001860100001)(5001920100001)(76176999)(54356999)(50986999)(65816999)(64706001)(87266999)(65806001)(65956001)(81156007)(93886004)(4001540100001)(19580395003)(4001350100001)(62966003)(68736005)(80316001)(84326002)(86362001)(97736004)(2950100001)(568964001)(5890100001)(40100003)(77156002)(122386002)(36756003)(3826002)(5001840100002); DIR:OUT; SFP:1101; SCL:1; SRVR:VI1PR07MB0942; H:[IPv6:2001:470:183f:da2b::9b1c:6a15]; FPR:; SPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en; Received-SPF: None (protection.outlook.com: darbyshire-bryant.me.uk does not designate permitted sender hosts) X-OriginatorOrg: darbyshire-bryant.me.uk X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 May 2015 08:09:19.8134 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR07MB0942 Cc: bloat Subject: Re: [Bloat] tc -s qdisc questions X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 May 2015 08:09:56 -0000 X-List-Received-Date: Mon, 18 May 2015 08:09:56 -0000 --------------ms010003090903050403050505 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: quoted-printable On 18/05/15 06:46, Mikael Abrahamsson wrote: > On Sun, 17 May 2015, Kevin Darbyshire-Bryant wrote: > >> Thanks Mikael - some ECN tweakage in progress. I'll see which bits=20 >> of the Internet I use break :-) > > I have been running this on my macbook for almost 2 years (since I got = > it): > > $ cat /etc/sysctl.conf > net.inet.tcp.ecn_initiate_out=3D1 > net.inet.tcp.ecn_negotiate_in=3D1 > > and this on my linux server for 5+ years: > > $ cat /etc/sysctl.conf | grep -i ecn > net.ipv4.tcp_ecn =3D 1 > > I used the same on my previous Ubuntu based laptop for 5+ years. > > I have yet to encounter any ECN related breakage. I have had=20 > significant problems with IPv6 PMTUD blackholing, but no ECN related=20 > problems. I had ECN related problems back in 2001 (or whenever it=20 > was) when Linux first introduced it due to a lot of firewalls being=20 > very paranoid about it, but then I turned it back on again 5-7 years=20 > ago and by then all problems were gone. > That's good to know :-) And for those struggling (ok just me then) to get ecn to survive a=20 reboot on OpenWrt despite playing with sysctl.conf, instead add "option=20 tcp_ecn '1'" in /etc/config/firewall something like: config defaults option syn_flood '1' option input 'ACCEPT' option output 'ACCEPT' option forward 'REJECT' option drop_invalid '1' option tcp_ecn '1' Kevin (being that 'better built idiot' since 1971) :-) --------------ms010003090903050403050505 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIINnDCC BjQwggQcoAMCAQICAR4wDQYJKoZIhvcNAQEFBQAwfTELMAkGA1UEBhMCSUwxFjAUBgNVBAoT DVN0YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNp Z25pbmcxKTAnBgNVBAMTIFN0YXJ0Q29tIENlcnRpZmljYXRpb24gQXV0aG9yaXR5MB4XDTA3 MTAyNDIxMDE1NVoXDTE3MTAyNDIxMDE1NVowgYwxCzAJBgNVBAYTAklMMRYwFAYDVQQKEw1T dGFydENvbSBMdGQuMSswKQYDVQQLEyJTZWN1cmUgRGlnaXRhbCBDZXJ0aWZpY2F0ZSBTaWdu aW5nMTgwNgYDVQQDEy9TdGFydENvbSBDbGFzcyAxIFByaW1hcnkgSW50ZXJtZWRpYXRlIENs aWVudCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMcJg8zOLdgasSmkLhOr lr6KMoOMpohBllVHrdRvEg/q6r8jR+EK75xCGhR8ToREoqe7zM9/UnC6TS2y9UKTpT1v7RSM zR0t6ndl0TWBuUr/UXBhPk+Kmy7bI4yW4urC+y7P3/1/X7U8ocb8VpH/Clt+4iq7nirMcNh6 qJR+xjOhV+VHzQMALuGYn5KZmc1NbJQYclsGkDxDz2UbFqE2+6vIZoL+jb9x4Pa5gNf1TwSD kOkikZB1xtB4ZqtXThaABSONdfmv/Z1pua3FYxnCFmdr/+N2JLKutIxMYqQOJebr/f/h5t95 m4JgrM3Y/w7YX9d7YAL9jvN4SydHsU6n65cCAwEAAaOCAa0wggGpMA8GA1UdEwEB/wQFMAMB Af8wDgYDVR0PAQH/BAQDAgEGMB0GA1UdDgQWBBRTcu2SnODaywFcfH6WNU7y1LhRgjAfBgNV HSMEGDAWgBROC+8apEBbpRdphzDKNGhD0EGu8jBmBggrBgEFBQcBAQRaMFgwJwYIKwYBBQUH MAGGG2h0dHA6Ly9vY3NwLnN0YXJ0c3NsLmNvbS9jYTAtBggrBgEFBQcwAoYhaHR0cDovL3d3 dy5zdGFydHNzbC5jb20vc2ZzY2EuY3J0MFsGA1UdHwRUMFIwJ6AloCOGIWh0dHA6Ly93d3cu c3RhcnRzc2wuY29tL3Nmc2NhLmNybDAnoCWgI4YhaHR0cDovL2NybC5zdGFydHNzbC5jb20v c2ZzY2EuY3JsMIGABgNVHSAEeTB3MHUGCysGAQQBgbU3AQIBMGYwLgYIKwYBBQUHAgEWImh0 dHA6Ly93d3cuc3RhcnRzc2wuY29tL3BvbGljeS5wZGYwNAYIKwYBBQUHAgEWKGh0dHA6Ly93 d3cuc3RhcnRzc2wuY29tL2ludGVybWVkaWF0ZS5wZGYwDQYJKoZIhvcNAQEFBQADggIBAAqD CH14qywGXLhjjF6uHLkjd02hcdh9hrw+VUsv+q1eeQWB21jWj3kJ96AUlPCoEGZ/ynJNScWy 6QMVQjbbMXltUfO4n4bGGdKo3awPWp61tjAFgraLJgDk+DsSvUD6EowjMTNx25GQgyYJ5RPI zKKR9tQW8gGK+2+RHxkUCTbYFnL6kl8Ch507rUdPPipJ9CgJFws3kDS3gOS5WFMxcjO5DwKf KSETEPrHh7p5shuuNktvsv6hxHTLhiMKX893gxdT3XLS9OKmCv87vkINQcNEcIIoFWbP9HOR z9v3vQwR4e3ksLc2JZOAFK+ssS5XMEoznzpihEP0PLc4dCBYjbvSD7kxgDwZ+Aj8Q9PkbvE9 sIPP7ON0fz095HdThKjiVJe6vofq+n6b1NBc8XdrQvBmunwxD5nvtTW4vtN6VY7mUCmxsCie uoBJ9OlqmsVWQvifIYf40dJPZkk9YgGTzWLpXDSfLSplbY2LL9C9U0ptvjcDjefLTvqSFc7t w1sEhF0n/qpA2r0GpvkLRDmcSwVyPvmjFBGqUp/pNy8ZuPGQmHwFi2/14+xeSUDG2bwnsYJQ G2EdJCB6luQ57GEnTA/yKZSTKI8dDQa8Sd3zfXb19mOgSF0bBdXbuKhEpuP9wirslFe6fQ1t 5j5R0xi72MZ8ikMu1RQZKCyDbMwazlHiMIIHYDCCBkigAwIBAgIDCm0/MA0GCSqGSIb3DQEB BQUAMIGMMQswCQYDVQQGEwJJTDEWMBQGA1UEChMNU3RhcnRDb20gTHRkLjErMCkGA1UECxMi U2VjdXJlIERpZ2l0YWwgQ2VydGlmaWNhdGUgU2lnbmluZzE4MDYGA1UEAxMvU3RhcnRDb20g Q2xhc3MgMSBQcmltYXJ5IEludGVybWVkaWF0ZSBDbGllbnQgQ0EwHhcNMTQwNzAzMTE1NjM5 WhcNMTUwNzA0MTc0MjQ1WjBxMRkwFwYDVQQNExA2dVNGb1pMU1d2dGgyd2tNMSYwJAYDVQQD DB1rZXZpbkBkYXJieXNoaXJlLWJyeWFudC5tZS51azEsMCoGCSqGSIb3DQEJARYda2V2aW5A ZGFyYnlzaGlyZS1icnlhbnQubWUudWswggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoIC AQDqCZMbkat9lukbtY+VQ4HBVkcHtcUU1sWZlg7foJ6XEQXCb3ArlyY7V+AldkNY6qRlrlVt YZmSFtDsors5e3Z1VWlEYBZEbnR57t5jmfGYmaaDzc8YsWr5gsUTa+MV/MNHpuAlf9GwgQCQ e7SC7kEzkQZApfB8/zG/a5JxgVXD9c3vK40p3OW27ZqVN9rie5SoLi1KEfQbA//VyPPeDpus oDwYGq6AA82lLFvgBxi1JPlS7M9zToUQCXpvDexQPiok1iqhwYBwX3qmSInlVWnudgaJ25iL m8/9bG5nCIo+dOEZP/bOCEsMzV8n9RaCNu8ilpjMXsHbkgrlvng81CTUFlYWhdMg58CM7N9y gSBjCKuHmJwQbIdsCmuKEOFVLZR8OZzoue6e/HAQlunWEfrr/H4+UYp8yTNLybqfcyZ3k7Sg i207jicY5dVKKFFY8eSB8Ps2svxj6BgrNPZMGzW36zRwaK1MpOZxHItCcuyXo+WkI3/61BZ5 mg34ejrgalQ04887n+4u3XPKnM/IwXfivlOD+n8bOOAGR8iZVlLTVmvypMdX3+wL/yB/w8g1 Ojj9Bk5/ksZb9Eh+3q1cVOOuXa/hcCLLqetNFzlxHjbVXzBKwO9pOs50DVxtv070KalD3iqz 8hCwnDt7odkGHwXyZAErmUSjc6tqVMivid/1swIDAQABo4IC4zCCAt8wCQYDVR0TBAIwADAL BgNVHQ8EBAMCBLAwHQYDVR0lBBYwFAYIKwYBBQUHAwIGCCsGAQUFBwMEMB0GA1UdDgQWBBSg QyTrQHiayWJq77xyyu7kpPmJ2jAfBgNVHSMEGDAWgBRTcu2SnODaywFcfH6WNU7y1LhRgjAo BgNVHREEITAfgR1rZXZpbkBkYXJieXNoaXJlLWJyeWFudC5tZS51azCCAUwGA1UdIASCAUMw ggE/MIIBOwYLKwYBBAGBtTcBAgMwggEqMC4GCCsGAQUFBwIBFiJodHRwOi8vd3d3LnN0YXJ0 c3NsLmNvbS9wb2xpY3kucGRmMIH3BggrBgEFBQcCAjCB6jAnFiBTdGFydENvbSBDZXJ0aWZp Y2F0aW9uIEF1dGhvcml0eTADAgEBGoG+VGhpcyBjZXJ0aWZpY2F0ZSB3YXMgaXNzdWVkIGFj Y29yZGluZyB0byB0aGUgQ2xhc3MgMSBWYWxpZGF0aW9uIHJlcXVpcmVtZW50cyBvZiB0aGUg U3RhcnRDb20gQ0EgcG9saWN5LCByZWxpYW5jZSBvbmx5IGZvciB0aGUgaW50ZW5kZWQgcHVy cG9zZSBpbiBjb21wbGlhbmNlIG9mIHRoZSByZWx5aW5nIHBhcnR5IG9ibGlnYXRpb25zLjA2 BgNVHR8ELzAtMCugKaAnhiVodHRwOi8vY3JsLnN0YXJ0c3NsLmNvbS9jcnR1MS1jcmwuY3Js MIGOBggrBgEFBQcBAQSBgTB/MDkGCCsGAQUFBzABhi1odHRwOi8vb2NzcC5zdGFydHNzbC5j b20vc3ViL2NsYXNzMS9jbGllbnQvY2EwQgYIKwYBBQUHMAKGNmh0dHA6Ly9haWEuc3RhcnRz c2wuY29tL2NlcnRzL3N1Yi5jbGFzczEuY2xpZW50LmNhLmNydDAjBgNVHRIEHDAahhhodHRw Oi8vd3d3LnN0YXJ0c3NsLmNvbS8wDQYJKoZIhvcNAQEFBQADggEBAChYSPOI6HHjtB2zQSGb 7vqo2f/QAum648uoNCFXf/ZmpU42ca6hq/JqsugqbnCY72hNTpCh3JZwTTaBWBvj1vzjjMra pLixIvceaAqMj6vd+L43APuMMmTH9tUUNS1ksXdA2r6STVIbr4p2sbVV3WktLGFnNAy5uXbr mLHay5w6jcmSfTAh1aA49sSvp+8CB6q6uDef2j9X8OE9Ajr5l0mcnGdVOkLZU6Zq20G8jb3p sdqoO9MU5UbKfZCN4/ibr+/0Pj3VZIE3jCEW2DwguN6DIDAYVc6b7RFGf3cWadJrSa887Sc/ 9wzXymTKAyBvfgRQeWcZ+5w4RlOI/TmpNfwxggTdMIIE2QIBATCBlDCBjDELMAkGA1UEBhMC SUwxFjAUBgNVBAoTDVN0YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENl cnRpZmljYXRlIFNpZ25pbmcxODA2BgNVBAMTL1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJ bnRlcm1lZGlhdGUgQ2xpZW50IENBAgMKbT8wCQYFKw4DAhoFAKCCAh0wGAYJKoZIhvcNAQkD MQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTUwNTE4MDgwOTAzWjAjBgkqhkiG9w0B CQQxFgQUjRt6h+clewk2yPGITrW90SftmAwwbAYJKoZIhvcNAQkPMV8wXTALBglghkgBZQME ASowCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA4GCCqGSIb3DQMCAgIAgDANBggqhkiG9w0D AgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKDCBpQYJKwYBBAGCNxAEMYGXMIGUMIGMMQsw CQYDVQQGEwJJTDEWMBQGA1UEChMNU3RhcnRDb20gTHRkLjErMCkGA1UECxMiU2VjdXJlIERp Z2l0YWwgQ2VydGlmaWNhdGUgU2lnbmluZzE4MDYGA1UEAxMvU3RhcnRDb20gQ2xhc3MgMSBQ cmltYXJ5IEludGVybWVkaWF0ZSBDbGllbnQgQ0ECAwptPzCBpwYLKoZIhvcNAQkQAgsxgZeg gZQwgYwxCzAJBgNVBAYTAklMMRYwFAYDVQQKEw1TdGFydENvbSBMdGQuMSswKQYDVQQLEyJT ZWN1cmUgRGlnaXRhbCBDZXJ0aWZpY2F0ZSBTaWduaW5nMTgwNgYDVQQDEy9TdGFydENvbSBD bGFzcyAxIFByaW1hcnkgSW50ZXJtZWRpYXRlIENsaWVudCBDQQIDCm0/MA0GCSqGSIb3DQEB AQUABIICAKqAM1PeHXNgNSL80JVcJTks55WsKmlLCoSXmjpTOcgvCa2SQVgZVJTJwCuDdeEE rmo1k9jKRpSz2svILjzwPm2HkDBWASfqsaRrckMeDI/HEZm+CWCgfpU3hiAoFhlyX8G+yNqT SS575+OfjSHV5ml8EnbkbIgAlRMB3ApRayWFuC+gsd0X6Mfsr7JbdUtYwTgIdzXHdMh+Y8o8 hXjdxj7Cuog1SbFOdAsgYJzxkeSr8aQv7I5OE/lvWL7s5kmQBEd6TeYXU9nB8OZ41nFBHr4o UH/sU67ElvBeP6SnutRVSM0TZqREQUZEySF20UOf7U7QN5hi6cWh5QsK53W25v5gwOLOIoIk TZjFvlehndjm8VAplfD9EmGHYqtr7n8ifV1rYiy8+493hMjcQ+Et9aBM3ziQvYeoDXgkxepH WpEH7RJS65A9m2jTfOuSPPECyT39iiV+uxX6aq7/KsWV2T7ubsx1yh6oCGaI3zjGt32uMll7 2XjLnT1KECi8iR3ecNk6wizXbh0sYhapXSYy0IlQ3XAyWZNvpAT1TZ99O8wQG41NhbMLgSJn XoqYy1mer9sjrUtRNs+gwQ/SLuMON8IV++zHEXATRqwxjfGeZgQV2YBfKCGVYtZVOmBe0Qml XBYkx8Ur2otfagtIW9VWn3uyGPXPcfm1QkIHwmiLf4PXAAAAAAAA --------------ms010003090903050403050505--