[Detnet] Roman Danyliw's No Objection on draft-ietf-detnet-bounded-latency-09: (with COMMENT)
Roman Danyliw via Datatracker <noreply@ietf.org> Wed, 06 April 2022 13:22 UTC
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From: Roman Danyliw via Datatracker <noreply@ietf.org>
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Date: Wed, 06 Apr 2022 06:22:47 -0700
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Subject: [Detnet] Roman Danyliw's No Objection on draft-ietf-detnet-bounded-latency-09: (with COMMENT)
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Roman Danyliw has entered the following ballot position for draft-ietf-detnet-bounded-latency-09: No Objection 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/about/groups/iesg/statements/handling-ballot-positions/ for more information about how to handle DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: https://datatracker.ietf.org/doc/draft-ietf-detnet-bounded-latency/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- Thank you to Watson Ladd for the SECDIR review. ** Section 8. It wasn’t clear to me that outright control of a resource (e.g., relay) was needed impact the latency bound calculation. Recommending a bit more flexibility on what an attack would take: OLD but may have the ability to control some resources within the boundary of the DetNet domain. NEW but may have the ability to control or change the behavior of some resources within the boundary of the DetNet domain. ** Section 8. An example of such attacks is to make some traffic sources under the control of the attacker send more traffic than their assumed T-SPECs. This type of attack is typically avoided by ingress conditioning at the edge of a DetNet domain If a traffic source _in the DetNet_ is induced to send more than their T-SPEC, how does ingress conditioning at the edge help with mitigation? This DetNet node is already in the DetNet domain. ** Section 8. Figure 1 presented a taxonomy of delays (#1 – 6) for the timing model. It would be helpful to explicitly extend this taxonomy to a threat analysis, or to rule out that mitigating certain threats are out of scope. For example: -- 1: Output delay: ? -- 2: Link delay: somewhat covered by the discussion of timing; and violating T-SPECs. -- 3: Frame preemption delay: ? -- 4: Processing delay: ? -- 5: Regulation delay: ? -- 6: Queuing delay: covered by “Some queuing mechanisms require time synchronization and operate correctly only if the time synchronization works correctly ...”
- [Detnet] Roman Danyliw's No Objection on draft-ie… Roman Danyliw via Datatracker
- Re: [Detnet] Roman Danyliw's No Objection on draf… Mohammadpour Ehsan