[Detnet] Alissa Cooper's Discuss on draft-ietf-detnet-architecture-11: (with DISCUSS and COMMENT)
Alissa Cooper <alissa@cooperw.in> Wed, 20 February 2019 14:54 UTC
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From: Alissa Cooper <alissa@cooperw.in>
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Date: Wed, 20 Feb 2019 06:54:37 -0800
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Subject: [Detnet] Alissa Cooper's Discuss on draft-ietf-detnet-architecture-11: (with DISCUSS and COMMENT)
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Alissa Cooper has entered the following ballot position for draft-ietf-detnet-architecture-11: Discuss When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-detnet-architecture/ ---------------------------------------------------------------------- DISCUSS: ---------------------------------------------------------------------- = Section 6 = "DetNet is provides a Quality of Service (QoS), and as such, does not directly raise any new privacy considerations." This seems like a false statement given the possibility that DetNet may require novel flow IDs and OAM tags that create additional identification and correlation risk beyond existing fields used to support QoS today. ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- I support Benjamin's DISCUSS. I agree with others that this document should be informational. = Section 3.1 = "There are, of course, simpler methods available (and employed, today) to achieve levels of latency and packet loss that are satisfactory for many applications." I think this paragraph would make more sense if it said "specific levels of latency and packet loss for particular applications." A lot of applications have satisfactory performance without any of the methods/techniques described. "Prioritization and over-provisioning is one such technique." It seems these are two techniques, not one. = Section 3.2.1.2 = s/sensitive/time-sensitive/ I can't parse this sentence: 'In general, users are encouraged to use, instead of, "do this when you get the packet," a combination of: o Sub-microsecond time synchronization among all source and destination end systems, and o Time-of-execution fields in the application packets.' = Section 3.2.2.2 = s/ Either of these functions/ Any of these functions/ "Providing sequencing information to the packets of a DetNet compound flow. This may be done by adding a sequence number or time stamp as part of DetNet, or may be inherent in the packet, e.g., in a higher layer protocol, or associated to other physical properties such as the precise time (and radio channel) of reception of the packet." How do multiple connected DetNet nodes know which fields they are supposed to use as the packet sequence number? = Section 3.3.1 = "the highest-priority non-DetNet packet is also ensured a worst-case latency." --> Did you mean "ensured less than or equal to a worst-case latency"? = Section 4.3.2 = If applications need to be altered to be run over DetNet, or if they need to be DetNet-aware, it would be useful to state that explicitly up front somewhere in this document. This is sort of implied in this section but it's not clear. = Section 6 = "However, the requirement for every (or almost every) node along the path of a DetNet flow to identify DetNet flows may present an additional attack surface for privacy, should the DetNet paradigm be found useful in broader environments." I'm not sure what is meant by "broader environments." Is the implication that flow identification doesn't present a privacy risk within a single administrative domain? I don't think that is always true.
- [Detnet] Alissa Cooper's Discuss on draft-ietf-de… Alissa Cooper
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Lou Berger
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Alissa Cooper
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Lou Berger
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… János Farkas
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… János Farkas
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Alissa Cooper
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… János Farkas
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Greg Mirsky
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Stewart Bryant
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Alissa Cooper
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Black, David
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… János Farkas
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… János Farkas
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… Alissa Cooper
- Re: [Detnet] Alissa Cooper's Discuss on draft-iet… János Farkas