Subject: Re: [TICTOC] I-D Action: draft-ietf-tictoc-ptp-enterprise-profile-07.txt

From: John Fletcher <[email-masked]>
Date: Tue, 5 Sep 2017 13:49:45 +0000

Comments/questions on Announce Receipt Timeout:

The profile says: "The Announce Receipt Timeout Interval SHALL be three Announce Intervals for Preferred Masters, and four Announce Intervals for all other masters."  However, IEEE 1588 says (section 7.7.3.1) that the product of Announce Receipt Timeout and Announce Interval should be uniform throughout a domain.  Why the departure from the 1588 recommendation?

Announce Receipt Timeout is used in the state machine for slave-only as well as full (master-capable) implementations so the profile needs to clearer about where the different values apply.

Minor comments:

In section 6, I think Follow-up messages also have to be sent multicast but this is not specified.

In section 12, typo "of for"

In section 14, typo "Profile Profile will will not"

Regards,
John Fletcher

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Sent: 21 August 2017 16:57
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Subject: [TICTOC] I-D Action: draft-ietf-tictoc-ptp-enterprise-profile-07.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Timing over IP Connection and Transfer of Clock WG of the IETF.

        Title           : Enterprise Profile for the Precision Time Protocol With Mixed Multicast and Unicast Messages
        Authors         : Doug Arnold
                          Heiko Gerstung
        Filename        : draft-ietf-tictoc-ptp-enterprise-profile-07.txt
        Pages           : 12
        Date            : 2017-08-21

Abstract:
    This document describes a profile for the use of the Precision
    Time Protocol in an IPV4 or IPv6 Enterprise information system
    environment.  The profile uses the End to End Delay Measurement
    Mechanism, allows both multicast and unicast Delay Request and Delay
    Response Messages.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-tictoc-ptp-enterprise-profile/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-tictoc-ptp-enterprise-profile-07
https://datatracker.ietf.org/doc/html/draft-ietf-tictoc-ptp-enterprise-profile-07

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-tictoc-ptp-enterprise-profile-07

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.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

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