From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eliot Blennerhassett Subject: AVB QoS support (IEEE802.1 Qav and Qat) Date: Thu, 17 Feb 2011 08:51:17 +1300 Message-ID: <4D5C2AB5.8010009@audioscience.com> References: <4D488D9B.5080409@audioscience.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from smtp4.clear.net.nz ([203.97.37.64]:55501 "EHLO smtp4.clear.net.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751063Ab1BPTvU (ORCPT ); Wed, 16 Feb 2011 14:51:20 -0500 Received: from [192.168.36.2] (121-72-250-62.cable.telstraclear.net [121.72.250.62]) by smtp4.clear.net.nz (CLEAR Net Mail) with ESMTP id <0LGQ00LXF75I0S50@smtp4.clear.net.nz> for netdev@vger.kernel.org; Thu, 17 Feb 2011 08:51:19 +1300 (NZDT) In-reply-to: <4D488D9B.5080409@audioscience.com> Sender: netdev-owner@vger.kernel.org List-ID: Greetings Can linux network stacks can support the various protocols required by AVB? It is not clear to me if it already does, and in any case how the setup would be accessed? In particular these two standards and the interaction between them 802.1Qat - Stream Reservation Protocol 802.1Qav - Forwarding and Queuing Enhancements for Time-Sensitive Streams (approved on Dec 10th, 2009) Qav requires traffic shaping to smooth the traffic flow in guaranteed stream class. This is afaik based on 1 packet per stream per 125us Note that in future (maybe already) there will be hardware assist for this feature in NIC chips. -- Eliot Blennerhassett AudioScience Inc. [1] http://www.ieee802.org/1/pages/avbridges.html [2] http://en.wikipedia.org/wiki/Audio_Video_Bridging#Traffic_shaping_for_AV_streams