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Tue, 12 Jun 2018 23:02:58 +0000 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.4 \(3445.8.2\)) From: Geoff Huston In-Reply-To: Date: Wed, 13 Jun 2018 09:02:43 +1000 Cc: Dave Taht , bloat Content-Transfer-Encoding: quoted-printable Message-Id: <4E4AF97A-8B22-4355-AF63-B27529F22D94@apnic.net> References: <345707C0-F15A-4CBB-A224-27C14BFEC0DF@apnic.net> To: "Bless, Roland (TM)" X-Mailer: Apple Mail (2.3445.8.2) X-Originating-IP: [2001:44b8:1121:1a00:848e:72c9:e760:bee] X-ClientProxiedBy: ME2PR01CA0009.ausprd01.prod.outlook.com (2603:10c6:201:15::21) To SG2PR04MB1184.apcprd04.prod.outlook.com (2a01:111:e400:7810::30) X-MS-PublicTrafficType: Email X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652020)(5600026)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7153060)(7193020); SRVR:SG2PR04MB1184; X-Microsoft-Exchange-Diagnostics: 1; SG2PR04MB1184; 3:UD7q2czDwb8scYnAcO8dQ87PmD+VnbJ3PMDzhuuW8304/FpWrBksl6S42RpuRIic+l7lPA47mziPNoksJNAaTzolNQN9CEl/4hvEhFDpOBJdmpomLipLhUcG+sxP2JS2HWpomzkQ8gxr10sW5oMvDWos33e/WLFELISRlUgt8yTOyz1QZDnijePGCDUJIb0cR4eEWcdaG/et88sW2kYhGHT6zInEjY4BR9Uf+ktan/oixY0URnUc3vFAFDBVjXBc; 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So using 11, 23, and 34 seconds may > make a difference in convergence speed (that was at least observed > in our experiments). I=E2=80=99m not sure that I follow this - It was my understanding that = BBR used the RTT interval as its control timer, and maintained a = constant send rate for 6 successive RTTY intervals, then inflated the = sending r4ate by 25% for the next RTT interval and deflated it by the = same amount for the next RTT interval. I don=E2=80=99t believe that = there is any absolute timer in BBR along the lines of a 10 second timer = that you appear to be suggesting here. regards, Geoff