From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oa1-x2b.google.com (mail-oa1-x2b.google.com [IPv6:2001:4860:4864:20::2b]) (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 C196E3B2A4 for ; Sun, 16 Apr 2023 13:54:17 -0400 (EDT) Received: by mail-oa1-x2b.google.com with SMTP id 586e51a60fabf-187b51ed66fso7916507fac.6 for ; Sun, 16 Apr 2023 10:54:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1681667657; x=1684259657; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=to87IH6bH0UGhGVccuB39yTzJXHH4jFZK9EXXu3hK+c=; b=NrUB5TqgEuIVOuy9AqvNaktuS1n2xLxka25SuzqXN6Gc0UBFdUFMz+599zRSBdpY4g 2IF4UnV4UcPgTuy3iA+U3ycEGQ4sl2hn7pdDpMwHH9JLFpUrDv+qe26nEKyIQwbQhSss 5hlF66w4uHXAb4kmNDOWGTNYEIu/SDpqlSj26tDS/1SdevRDggMVeKRyAuIMpHHZMflP SOVlYnBDXrBhdzi5KVHMozMLDfV/TgEI9ipuFlF5IYKE+Tfamaw0E+iIAUA//jAMmYT1 HsFsj5QKDcirog7g5usTL0S6uVZx8LfS46A7Cx8lcBOfXBJwtsrN58gu4KBp5hqCOF2x +/pQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681667657; x=1684259657; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=to87IH6bH0UGhGVccuB39yTzJXHH4jFZK9EXXu3hK+c=; b=Ir7Em/qTuIet/IAXzCSFD8l6YBXfUM2jKzPc8QaC5GbVrk5EqaJJiru+U5+rnCa7fh NxLXzeEhp5HSH7KOzpgstnnoQkMyEQeFpyTtaZbaBbXoXsFRx0uUvjp4kdHNSYa5lNAc JTYSJZ0kVLz7UFhc+Fnbe3RJ6FENjBbOXtKTeQsuiMOIaYV1VbLTs5aIMu/Uw+Gx0nIv NmwSssTrYQ7hnmPpfT6Aw4othIs5kXc0vexki5z5n/ALQ4wK14brG3kR1HwAzxPsOxXc ldxLpGqu0DldbTzhO1dbe07NSkMQfr//btkoqx7dDIwKzCqLHyB1Maml7LRaF7bNiUAC jV/Q== X-Gm-Message-State: AAQBX9eZuEqJnIr5ifXK6I6NAS9JUyVqUoC7h/rXe6hL3Jq8bBgmrN6v 9VklhpO1H7Eya8GfzG0p9tTVUvVydwN9+ObEo3w+bhA1xow= X-Google-Smtp-Source: AKy350ZP3yHsWQdbJTWfpJBDYhQK7lF5EEa2jh5PVtN/Nl1YipUQoN7M8p6l1uOU/GRYaaw9tC3nc80HRSVY9997Sz0= X-Received: by 2002:a05:6870:440e:b0:17e:d308:776f with SMTP id u14-20020a056870440e00b0017ed308776fmr4770373oah.1.1681667656677; Sun, 16 Apr 2023 10:54:16 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a05:6358:8813:b0:112:aa6f:321f with HTTP; Sun, 16 Apr 2023 10:54:16 -0700 (PDT) From: =?UTF-8?Q?David_Fern=C3=A1ndez?= Date: Sun, 16 Apr 2023 19:54:16 +0200 Message-ID: To: starlink@lists.bufferbloat.net Content-Type: text/plain; charset="UTF-8" Subject: Re: [Starlink] fiber IXPs in space X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 16 Apr 2023 17:54:17 -0000 In case you put a DNS server in the satellite, so that it replies instead of a DNS server on ground, the RTT is reduced by half. The idea would be that the satellite inspects IP packets and when it detects a DNS query, instead of forwarding the packet to ground station, it just answers back to the sender of the query. Nowadays, satellites (starlink included) are still transparent and are signal repeaters, not routers processing IP packets, so doing this is not immediate at all, but it could bring some benefits. CDNs or even datacenters (Cloud) in GEO or LEO is even more complex. Regards, David