Re: [MBONED] I-D Action: draft-ietf-mboned-ieee802-mcast-problems-01.txt
"Morten V. Pedersen" <morten@steinwurf.com> Mon, 12 March 2018 15:59 UTC
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From: "Morten V. Pedersen" <morten@steinwurf.com>
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Subject: Re: [MBONED] I-D Action: draft-ietf-mboned-ieee802-mcast-problems-01.txt
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Hi Mike and Charlie (and other co-authors), I did a read though of the: https://datatracker.ietf.org/doc/draft-ietf-mboned-ieee802-mcast-problems I used this for the line numbers: https://www.ietf.org/tools/idnits?url=https://www.ietf.org/archive/id/draft-ietf-mboned-ieee802-mcast-problems-01.txt Line 31: performace -> performance Line 509: Says that a DTIM of 3 means that the AP will send a multicast packet every 3 packets. I may be reading it wrong, but I do believe that it means that the AP will send multicast packets after every 3 beacon. An additional item for section 3. Is air-time restrictions on multicast traffic. E.g. see this patch for the ath9k driver in Linux. It is effectively limiting the time which can be spent on sending multicast packets to 1/8'th of the beacon interval. https://patchwork.kernel.org/patch/2687951/ This is a major problem for data intensive applications such as video delivery. Thanks for you great work on creating some visibility on this problem. All the best, Morten On 02/16/2018 08:40 PM, Mike McBride wrote: > Please review this draft. Charlie and I are committed to update this > draft (hopefully with your comments) with the latest info on this > problem space. We will request time in London to have further > discussion. mboned is in a position to offer an important reference to > these problems while also sneaking in workarounds and recommendations > to ieee 802. > > There may be much more we can add to this document with your help. We > will likely add information about higher layer protocols (OPC-UA, DDS, > etc) that utilize multicast in their message bus which may be > transmitted over 802. There are industries which rely upon these > protocols and they could use this draft to help address wireless > transmission issues. > > thanks, > mike > > On Sat, Feb 3, 2018 at 10:04 AM, <internet-drafts@ietf.org > <mailto:internet-drafts@ietf.org>> wrote: > > > A New Internet-Draft is available from the on-line Internet-Drafts > directories. > This draft is a work item of the MBONE Deployment WG of the IETF. > > Title : Multicast Considerations over IEEE 802 > Wireless Media > Authors : Charles E. Perkins > Mike McBride > Dorothy Stanley > Warren Kumari > Juan Carlos Zuniga > Filename : > draft-ietf-mboned-ieee802-mcast-problems-01.txt > Pages : 20 > Date : 2018-02-03 > > Abstract: > Well-known issues with multicast have prevented the deployment of > multicast in 802.11 [dot11], [mc-props], [mc-prob-stmt], and other > local-area wireless environments. IETF multicast experts have been > meeting together to discuss these issues and provide IEEE updates. > The mboned working group is chartered to receive regular reports on > the current state of the deployment of multicast technology, create > "practice and experience" documents that capture the experience of > those who have deployed and are deploying various multicast > technologies, and provide feedback to other relevant working > groups. > This document offers guidance on known limitations and problems > with > wireless multicast. Also described are various multicast > enhancement > features that have been specified at IETF and IEEE 802 for wireless > media, as well as some operational chioces that can be taken to > improve the performace of the network. Finally, some > recommendations > are provided about the usage and combination of these features and > operational choices. > > > The IETF datatracker status page for this draft is: > https://datatracker.ietf.org/doc/draft-ietf-mboned-ieee802-mcast-problems/ > <https://datatracker.ietf.org/doc/draft-ietf-mboned-ieee802-mcast-problems/> > > There are also htmlized versions available at: > https://tools.ietf.org/html/draft-ietf-mboned-ieee802-mcast-problems-01 > <https://tools.ietf.org/html/draft-ietf-mboned-ieee802-mcast-problems-01> > https://datatracker.ietf.org/doc/html/draft-ietf-mboned-ieee802-mcast-problems-01 > <https://datatracker.ietf.org/doc/html/draft-ietf-mboned-ieee802-mcast-problems-01> > > A diff from the previous version is available at: > https://www.ietf.org/rfcdiff?url2=draft-ietf-mboned-ieee802-mcast-problems-01 > <https://www.ietf.org/rfcdiff?url2=draft-ietf-mboned-ieee802-mcast-problems-01> > > > Please note that it may take a couple of minutes from the time of > submission > until the htmlized version and diff are available at > tools.ietf.org <http://tools.ietf.org>. > > Internet-Drafts are also available by anonymous FTP at: > ftp://ftp.ietf.org/internet-drafts/ > <ftp://ftp.ietf.org/internet-drafts/> > > _______________________________________________ > MBONED mailing list > MBONED@ietf.org <mailto:MBONED@ietf.org> > https://www.ietf.org/mailman/listinfo/mboned > <https://www.ietf.org/mailman/listinfo/mboned> > > > > > _______________________________________________ > MBONED mailing list > MBONED@ietf.org > https://www.ietf.org/mailman/listinfo/mboned
- [MBONED] I-D Action: draft-ietf-mboned-ieee802-mc… internet-drafts
- Re: [MBONED] I-D Action: draft-ietf-mboned-ieee80… Mike McBride
- Re: [MBONED] I-D Action: draft-ietf-mboned-ieee80… Morten V. Pedersen