Hello Warren,
That’s a tough one. In section 5 I state: “IPv4 and IPv6 instances in the same network node MUST operate in different PTP Domains.” I am reluctant to take this further as IEEE 1588 hasn’t addressed it. One might be tempted to treat a dual stack as two ports to the same PTP instance. But that would be a problem for PTP timeTransmitters and timeReceivers which are specifically defined as one port clocks, with one protocol address. I am not sure what happens in real implementations if a single Ethernet port had a dual stack, with two PTP instances, one in each version of IP. Do they receive each other's messages and react to them as if it were two different PTP nodes? Is there a use case where someone wants them to, or wants them not to? I really don’t know at this time, and since no one requested either behavior I retreated to safety and kept them in different domains. Regards, Doug ________________________________ From: Warren Kumari via Datatracker <[email protected]> Sent: Wednesday, May 15, 2024 2:08 PM To: The IESG <[email protected]> Cc: [email protected] <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]> Subject: Warren Kumari's No Objection on draft-ietf-tictoc-ptp-enterprise-profile-26: (with COMMENT) Warren Kumari has entered the following ballot position for draft-ietf-tictoc-ptp-enterprise-profile-26: 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-tictoc-ptp-enterprise-profile/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- Thank you very much for writing this document - I found it an interesting read. Also, much thanks to Tim Chown for their excellent Ops-Dir review (https://datatracker.ietf.org/doc/review-ietf-tictoc-ptp-enterprise-profile-24-opsdir-lc-chown-2024-03-07/), and to the authors for addressing the comments; I think that there is still one remaining unaddressed comment ("In practice, would PTP operate over just one or the other, or might messages be duplicated in each protocol? How does the profile look for a dual-stack environment?").
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