From owner-svn-src-all@freebsd.org Sun Jul 26 19:47:40 2015 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 006CA9ABFCB; Sun, 26 Jul 2015 19:47:40 +0000 (UTC) (envelope-from gjb@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id D87D31F0C; Sun, 26 Jul 2015 19:47:39 +0000 (UTC) (envelope-from gjb@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.70]) by repo.freebsd.org (8.14.9/8.14.9) with ESMTP id t6QJld4w032552; Sun, 26 Jul 2015 19:47:39 GMT (envelope-from gjb@FreeBSD.org) Received: (from gjb@localhost) by repo.freebsd.org (8.14.9/8.14.9/Submit) id t6QJldJU032551; Sun, 26 Jul 2015 19:47:39 GMT (envelope-from gjb@FreeBSD.org) Message-Id: <201507261947.t6QJldJU032551@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: gjb set sender to gjb@FreeBSD.org using -f From: Glen Barber Date: Sun, 26 Jul 2015 19:47:39 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r285899 - releng/10.2/release/doc/en_US.ISO8859-1/relnotes X-SVN-Group: releng MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Jul 2015 19:47:40 -0000 Author: gjb Date: Sun Jul 26 19:47:38 2015 New Revision: 285899 URL: https://svnweb.freebsd.org/changeset/base/285899 Log: Document r273838, PLPMTUD blackhole detection (RFC 4821). Submitted by: sbruno Approved by: re (implicit) Sponsored by: The FreeBSD Foundation Modified: releng/10.2/release/doc/en_US.ISO8859-1/relnotes/article.xml Modified: releng/10.2/release/doc/en_US.ISO8859-1/relnotes/article.xml ============================================================================== --- releng/10.2/release/doc/en_US.ISO8859-1/relnotes/article.xml Sun Jul 26 19:47:08 2015 (r285898) +++ releng/10.2/release/doc/en_US.ISO8859-1/relnotes/article.xml Sun Jul 26 19:47:38 2015 (r285899) @@ -730,7 +730,80 @@ Network Procols -   + Support for PLPMTUD + blackhole detection (RFC 4821) has been + added to the &man.tcp.4; stack, disabled by default. New + control tunables have been added: + + + + + + + + Tunable + Description + + + + + + net.inet.tcp.pmtud_blackhole_detection + Enables or disables PLPMTUD + blackhole detection + + + + net.inet.tcp.pmtud_blackhole_mss + MSS to try for IPv4 + + + + net.inet.tcp.v6pmtud_blackhole_mss + MSS to try for IPv6 + + + + + + New monitoring &man.sysctl.8;s haven been added: + + + + + + + + Tunable + Description + + + + + + net.inet.tcp.pmtud_blackhole_activated + Number of times the code was activated to attempt + downshifting the MSS + + + + net.inet.tcp.pmtud_blackhole_min_activated + Number of times the blackhole + MSS was used in an attempt to + downshift + + + + net.inet.tcp.pmtud_blackhole_failed + Number of times that the blackhole failed to + connect after downshifting the + MSS + + + + +