From mboxrd@z Thu Jan 1 00:00:00 1970 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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 74DB8C433E0 for ; Thu, 25 Feb 2021 01:42:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 28F9E64F03 for ; Thu, 25 Feb 2021 01:42:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235570AbhBYBms (ORCPT ); Wed, 24 Feb 2021 20:42:48 -0500 Received: from vps0.lunn.ch ([185.16.172.187]:56880 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235552AbhBYBmq (ORCPT ); Wed, 24 Feb 2021 20:42:46 -0500 Received: from andrew by vps0.lunn.ch with local (Exim 4.94) (envelope-from ) id 1lF5fI-008Kfh-C1; Thu, 25 Feb 2021 02:42:04 +0100 Date: Thu, 25 Feb 2021 02:42:04 +0100 From: Andrew Lunn To: Vladimir Oltean Cc: netdev@vger.kernel.org, Florian Fainelli , Vivien Didelot , Jiri Pirko , Ido Schimmel , DENG Qingfang , Tobias Waldekranz , George McCollister , Horatiu Vultur , Kurt Kanzenbach Subject: Re: [RFC PATCH net-next 10/12] Documentation: networking: dsa: add paragraph for the HSR/PRP offload Message-ID: References: <20210221213355.1241450-1-olteanv@gmail.com> <20210221213355.1241450-11-olteanv@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210221213355.1241450-11-olteanv@gmail.com> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org > +IEC 62439-3 (HSR/PRP) > +--------------------- > + > +The Parallel Redundancy Protocol (PRP) is a network redundancy protocol which > +works by duplicating and sequence numbering packets through two independent L2 > +networks (which are unaware of the PRP tail tags carried in the packets), and > +eliminating the duplicates at the receiver. The High-availability Seamless > +Redundancy (HSR) protocol is similar in concept, except all nodes that carry > +the redundant traffic are aware of the fact that it is HSR-tagged (because HSR > +uses a header with an EtherType of 0x892f) and are physically connected in a > +ring topology. Both HSR and PRP use supervision frames for monitoring the I don't know HSR/PRP terms. Should it be supervisory instead of supervision? > +health of the network and for discovering the other nodes. Either "discovering other nodes" or "discovery of other nodes". > + > +In Linux, both HSR and PRP are implemented in the hsr driver, which > +instantiates a virtual, stackable network interface with two member ports. > +The driver only implements the basic roles of DANH (Doubly Attached Node > +implementing HSR) and DANP (Doubly Attached Node implementing PRP); the roles > +of RedBox and QuadBox aren't (therefore, bridging a hsr network interface with In colloquial English, you can get away with just 'aren't'. But in Queens English, you should follow it with something, in this case 'supported'. Andrew