Re: [Detnet] Packet Ordering Function (draft-varga-detnet-pof-00.txt)
Greg Mirsky <gregimirsky@gmail.com> Sat, 24 April 2021 01:04 UTC
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Fri, 23 Apr 2021 18:03:52 -0700
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To: Balázs Varga A <balazs.a.varga=40ericsson.com@dmarc.ietf.org>
Cc: "detnet@ietf.org" <detnet@ietf.org>
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Subject: Re: [Detnet] Packet Ordering Function (draft-varga-detnet-pof-00.txt)
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Hi Balazs, thank you for the well-designed mechanism of one of the key DetNet functions. I have a scenario and would appreciate your consideration if you think it is a plausible one: - assume that POFLastSent = 100 - a packet with seq_num = 103 is received and placed into the buffer for the duration of POFMaxDelay - next received packet has seq_num = 102. It is also moved into the buffer for the duration of POFMaxDelay - finally, before all delayed packets transmitted out of the buffer, a packet with seq_num = 101 is received and is forwarded right away - the delay timer expires on the packet with seq_num=103. It is forwarded and POFLastSent = 103 - next, the delay timer expires on the packet with seq_num=102. It, in turn, is forwarded and POFLastSent = 102 - from now, based on my understanding of the described POF algorithm, every packet will be delayed even if there are no re-ordered packets. For example, the sequence of arriving packets is as 104, 105, 106, ... Much appreciate your opinion if the scenario, i.e., a sequence like 100, 103, 102, 101, is a realistic one. Regards, Greg On Mon, Apr 19, 2021 at 10:39 PM Balázs Varga A <balazs.a.varga= 40ericsson.com@dmarc.ietf.org> wrote: > Hi, > > A draft on Packet Ordering Function (POF) algorithms were uploaded. > Comments and views are highly appreciated. > > Thanks > Bala'zs (and the authors) > > -----Original Message----- > From: internet-drafts@ietf.org <internet-drafts@ietf.org> > Sent: Tuesday, April 20, 2021 7:14 AM > To: Balázs Varga A <balazs.a.varga@ericsson.com>; Janos Farkas < > Janos.Farkas@ericsson.com>; Balázs Varga A <balazs.a.varga@ericsson.com>; > Janos Farkas <Janos.Farkas@ericsson.com>; Stephan Kehrer < > Stephan.Kehrer@belden.com>; Stephan Kehrer <stephan.kehrer@belden.com>; > Tobias Heer <Tobias.Heer@belden.com>; Tobias Heer <tobias.heer@belden.com> > Subject: New Version Notification for draft-varga-detnet-pof-00.txt > > > A new version of I-D, draft-varga-detnet-pof-00.txt has been successfully > submitted by =?utf-8?q?Bal=C3=A1zs_Varga?= and posted to the IETF > repository. > > Name: draft-varga-detnet-pof > Revision: 00 > Title: Deterministic Networking (DetNet): Packet Ordering Function > Document date: 2021-04-19 > Group: Individual Submission > Pages: 10 > URL: > https://www.ietf.org/archive/id/draft-varga-detnet-pof-00.txt > Status: https://datatracker.ietf.org/doc/draft-varga-detnet-pof/ > Htmlized: > https://datatracker.ietf.org/doc/html/draft-varga-detnet-pof > Htmlized: https://tools.ietf.org/html/draft-varga-detnet-pof-00 > > > Abstract: > Replication and Elimination functions of DetNet [RFC8655] may result > in out-of-order packets, which may not be acceptable for some time- > sensitive applications. The Packet Ordering Function (POF) algorithm > described herein enables to restore the correct packet order when > replication and elimination functions are used in DetNet networks. > > > > > 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. > > The IETF Secretariat > > > _______________________________________________ > detnet mailing list > detnet@ietf.org > https://www.ietf.org/mailman/listinfo/detnet >
- [Detnet] Packet Ordering Function (draft-varga-de… Balázs Varga A
- Re: [Detnet] Packet Ordering Function (draft-varg… Mohammadpour Ehsan
- Re: [Detnet] Packet Ordering Function (draft-varg… Balázs Varga A
- Re: [Detnet] Packet Ordering Function (draft-varg… Ludovic Thomas
- Re: [Detnet] Packet Ordering Function (draft-varg… Balázs Varga A
- Re: [Detnet] Packet Ordering Function (draft-varg… Greg Mirsky
- Re: [Detnet] Packet Ordering Function (draft-varg… Stephan Kehrer
- Re: [Detnet] Packet Ordering Function (draft-varg… Jeong-dong Ryoo
- Re: [Detnet] Packet Ordering Function (draft-varg… Balázs Varga A
- Re: [Detnet] Packet Ordering Function (draft-varg… Jeong-dong Ryoo
- [Detnet] 答复: Packet Ordering Function (draft-varg… Yangfan (IP Standard)
- Re: [Detnet] Packet Ordering Function (draft-varg… Balázs Varga A