From patchwork Sun Apr 12 23:50:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Bastien =?ISO-8859-1?Q?Roucari=E8s?= X-Patchwork-Id: 221255 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13FF0C2BB85 for ; Sun, 12 Apr 2020 23:52:48 +0000 (UTC) Received: from vger.kernel.org (unknown [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D025B20673 for ; Sun, 12 Apr 2020 23:52:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LWTrf8pv" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D025B20673 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=netdev-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726736AbgDLXvR (ORCPT ); Sun, 12 Apr 2020 19:51:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.18]:43036 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726185AbgDLXvR (ORCPT ); Sun, 12 Apr 2020 19:51:17 -0400 Received: from mail-wm1-x342.google.com (mail-wm1-x342.google.com [IPv6:2a00:1450:4864:20::342]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67124C0A3BE0 for ; Sun, 12 Apr 2020 16:51:17 -0700 (PDT) Received: by mail-wm1-x342.google.com with SMTP id y24so8479098wma.4 for ; Sun, 12 Apr 2020 16:51:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=yeuAm93V6IpEC7hxCyYl+KMTNm6d7S6GxycZRvnFds8=; b=LWTrf8pvvN3hx5zvIy7WoVh0gYEFLT4wSOE+7kUGjogd/1AuOufzhKbHGeJ8r2Uh0W bZJHg7BIQQfrhuV7OyHlwSCcd8t7DWTVlEiLX77oU3Oz6hB0t3h81g4uKwrw0ppra4sS ABlsFeGptiQrb5a90v2e++YoWkG9FvJMbyWU9LDNnJpvLKK4SLfieZREoLKhtCqGGPVe REh+kmQ5Y0f0AwkfhJCUeEZVSpkrtDdXSiJTCIKCtbET3OoxufuBSq1lQxkz09r8BtZQ pWK5v21LqR9835POJNAzb0K7FVuho/H0iyjETz3HEgxX9ouyr2CGFwoXf962Cd330IWh isrQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=yeuAm93V6IpEC7hxCyYl+KMTNm6d7S6GxycZRvnFds8=; b=oPoQW8wJfE/jYVvJwtvafXIOmLAU7FSm14KfFaLkcc8ntSK7KiYLdUe48nREcs1HnN 3C0nGimWESwBFzipMoWH99OZFMnN3pG5aJ4NGPRcgOVsvUYKIlLiZqc1ea6O2gBikUHk bvMPnmqvajNOIhhQVYTKcaHlp4Xl7/myO8HL13GOiUuO6rFWCgpznKJOIBhOVwPK4IrF Fg9skE7IMIeuIEbz+Oq2mcFCnMM9OULESu1ES0BVpgYlxMZgNJnjBeXfQF1SpVyOqyk/ 6+f7gPbn8+UrE1O9xyAuv3QtUnZSQtLcXrDonyLdPmW9hJCOy+CHWX/QeJZC2Ff+R6RL kD7g== X-Gm-Message-State: AGi0PubCuLwSLPKv94R49SdIO4B8qOGQbvsswKK/zHcOiV2ZPMi15jdt j6ajvW0yYv/kkGCR4oqCwN1DDosp X-Google-Smtp-Source: APiQypKYArWXzY7GWj7cL2QTXMX9oTs/ofWKVf9dKqysCXIVKpoA4KhbqcJ8o60fK8KyIN7CsRCiMg== X-Received: by 2002:a1c:7f91:: with SMTP id a139mr15405018wmd.164.1586735475580; Sun, 12 Apr 2020 16:51:15 -0700 (PDT) Received: from localhost ([2a01:e35:2f01:a61:fc49:14b:88c:2a9c]) by smtp.gmail.com with ESMTPSA id w11sm12100578wmi.32.2020.04.12.16.51.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Apr 2020 16:51:14 -0700 (PDT) From: roucaries.bastien@gmail.com X-Google-Original-From: rouca@debian.org To: netdev@vger.kernel.org Cc: sergei.shtylyov@cogentembedded.com, Stephen Hemminger , =?utf-8?q?Bastien_Roucari=C3=A8s?= Subject: [PATCH 5/6] Document root_block option Date: Mon, 13 Apr 2020 01:50:37 +0200 Message-Id: <20200412235038.377692-6-rouca@debian.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200412235038.377692-1-rouca@debian.org> References: <20200405134859.57232-1-rouca@debian.org> <20200412235038.377692-1-rouca@debian.org> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Bastien Roucariès Root_block is also called root port guard, document it. Signed-off-by: Bastien Roucariès --- man/man8/bridge.8 | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/man/man8/bridge.8 b/man/man8/bridge.8 index 9bfd942f..ff6a5cc9 100644 --- a/man/man8/bridge.8 +++ b/man/man8/bridge.8 @@ -372,6 +372,11 @@ enabled on the bridge. By default the flag is off. Controls whether a given port is allowed to become root port or not. Only used when STP is enabled on the bridge. By default the flag is off. +This feature is also called root port guard. +If BPDU is received from a leaf (edge) port, it should not +be elected as root port. This could be used if using STP on a bridge and the downstream bridges are not fully +trusted; this prevents a hostile guest from rerouting traffic. + .TP .BR "learning on " or " learning off " Controls whether a given port will learn MAC addresses from received traffic or