Re: [Gen-art] Genart last call review of draft-ietf-detnet-architecture-08
János Farkas <janos.farkas@ericsson.com> Wed, 06 February 2019 22:17 UTC
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To: "Joel M. Halpern" <jmh@joelhalpern.com>
CC: gen-art@ietf.org, DetNet WG <detnet@ietf.org>
References: <0cf9f2ac-f813-8f30-9889-4c1e5fc95b7b@ericsson.com> <a773d59b-92e0-8acc-348c-b79b3b6048a6@ericsson.com> <ce26f203-2429-1eaf-4b5e-c81c2b76bed4@joelhalpern.com>
From: János Farkas <janos.farkas@ericsson.com>
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Date: Wed, 06 Feb 2019 23:17:45 +0100
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Subject: Re: [Gen-art] Genart last call review of draft-ietf-detnet-architecture-08
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Hi Joel, Thank you very much again for your review! The draft had multiple updates since v08 you reviewed. The latest revision is v 11: https://mailarchive.ietf.org/arch/msg/detnet/SP63CCzi4C2Biy9mk0Qxrehoa_0 The updates address review comments, and comments and discussions on the DetNet WG list. Please let us know if you have further comments. Regards, Janos On 10/19/2018 9:17 PM, Joel M. Halpern wrote: > Thank you Janos. Two clarifications under retained text, with the > rest elided. > > Yours, > Joel > > On 10/19/18 3:10 PM, János Farkas wrote: > ... >> On 9/22/2018 2:59 AM, Joel Halpern wrote: > ... >>> Minor issues: >>> Section 3.1 states that worst case delay for priority queueing is >>> unbounded. That does not match my understanding. I know that >>> DelayBound >>> DSCP behavior tightly (although, I think, not as tightly as >>> Detnet) limits >>> both the worst case delay and the delay variation. >> Strict priority is not good enough for DetNet. A high priority packet >> may need to wait until the transmission of a lower priority packet is >> finished at an outbound port, which can cause too much uncertainties >> in the network. > > I understand that strict priority queueing is viewed as insufficient. > I wasn;t arguing about that. I was arguing with the use of the word > "unbounded". As far as I can tell, with suitable priority queueing > the worst case delay is bounded, simply not well enough bounded. > > ... >>> In section 4.1.2, I realized that the Detnet Transit node >>> terminology had >>> mildly confused me. The text says "DetNet enabled nodes are >>> interconnected >>> via transit nodes (e.g., LSRs) which support DetNet, but are >>> not DetNet >>> service aware." Reading this, and the definitions in section >>> 2.1, it >>> appears that a Detnet Transit node is a node that is providing >>> transport >>> behavior that detnet needs, but is not actually modified for >>> detnet. >> Based on last call comments: >> https://www.ietf.org/mail-archive/web/detnet/current/msg01791.html, >> the phrase "DetNet enabled nodes" is removed from the document and it >> has been made clear what type of DetNet node is meant: >> The text is updated to: >> >> A "Deterministic Network" will be composed of DetNet enabled end >> systems, DetNet edge nodes, DetNet relay nodes and collectively >> deliver DetNet services. DetNet relay and edge nodes are >> interconnected via DetNet transit nodes (e.g., LSRs) which support >> DetNet, but are not DetNet service aware. > > Any chance you could simply say "transit nodes" instead of "DetNet > transit nodes? As far as I can tell, they are existing nodes that > were designed and implemented (and even configured) potentially before > DetNet was even defined? > > ...
- [Gen-art] Genart last call review of draft-ietf-d… Joel Halpern
- Re: [Gen-art] Genart last call review of draft-ie… János Farkas
- Re: [Gen-art] Genart last call review of draft-ie… Joel M. Halpern
- Re: [Gen-art] Genart last call review of draft-ie… János Farkas
- Re: [Gen-art] Genart last call review of draft-ie… Pascal Thubert (pthubert)
- Re: [Gen-art] Genart last call review of draft-ie… János Farkas
- Re: [Gen-art] Genart last call review of draft-ie… János Farkas
- Re: [Gen-art] Genart last call review of draft-ie… Joel M. Halpern
- Re: [Gen-art] Genart last call review of draft-ie… Joel M. Halpern
- Re: [Gen-art] [Detnet] Genart last call review of… János Farkas