rfc9748v3.txt   rfc9748.txt 
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Updating the NTP Registries Updating the NTP Registries
Abstract Abstract
The Network Time Protocol (NTP) and Network Time Security (NTS) The Network Time Protocol (NTP) and Network Time Security (NTS)
documents define a number of registries, collectively called the NTP documents define a number of registries, collectively called the NTP
registries. registries.
Some registries are correct, but some include incorrect assignments Some registries are correct, but some include incorrect assignments
and some dont follow common practice. For the sake of completeness, and some don't follow common practice. For the sake of completeness,
this document reviews all NTP and NTS registries, and corrects the this document reviews all NTP and NTS registries, and corrects the
registries where necessary. registries where necessary.
This document updates RFCs 5905, 5906, 7821, 7822, and 8573. This document updates RFCs 5905, 5906, 7821, 7822, and 8573.
Status of This Memo Status of This Memo
This is an Internet Standards Track document. This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force This document is a product of the Internet Engineering Task Force
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1. Introduction 1. Introduction
The Network Time Protocol (NTP) and Network Time Security (NTS) The Network Time Protocol (NTP) and Network Time Security (NTS)
documents define a number of registries, collectively called the NTP documents define a number of registries, collectively called the NTP
registries. The NTP registries can all be found at registries. The NTP registries can all be found at
<https://www.iana.org/assignments/ntp-parameters> and the NTS <https://www.iana.org/assignments/ntp-parameters> and the NTS
registries can all be found at <https://www.iana.org/assignments/ registries can all be found at <https://www.iana.org/assignments/
nts>. nts>.
Some registries are correct, but some include incorrect assignments Some registries are correct, but some include incorrect assignments
and some dont follow common practice. For the sake of completeness, and some don't follow common practice. For the sake of completeness,
this document reviews all NTP and NTS registries, and corrects the this document reviews all NTP and NTS registries, and corrects the
registries where necessary. registries where necessary.
The bulk of this document can be divided into two parts: The bulk of this document can be divided into two parts:
* a summary of the relevant registries, including syntax * a summary of the relevant registries, including syntax
requirements, registration procedures, and the defining documents. requirements, registration procedures, and the defining documents.
* a revised format and entries for each registry being modified. * a revised format and entries for each registry being modified.
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| 0xC502 | Reserved for historic reasons | RFC 9748 | | 0xC502 | Reserved for historic reasons | RFC 9748 |
+---------------+------------------------------------+-------------+ +---------------+------------------------------------+-------------+
| 0xC602 | Reserved for historic reasons | RFC 9748 | | 0xC602 | Reserved for historic reasons | RFC 9748 |
+---------------+------------------------------------+-------------+ +---------------+------------------------------------+-------------+
| 0xC702 | Reserved for historic reasons | RFC 9748 | | 0xC702 | Reserved for historic reasons | RFC 9748 |
+---------------+------------------------------------+-------------+ +---------------+------------------------------------+-------------+
| 0xC802 | Reserved for historic reasons | RFC 9748 | | 0xC802 | Reserved for historic reasons | RFC 9748 |
+---------------+------------------------------------+-------------+ +---------------+------------------------------------+-------------+
| 0xC902 | Reserved for historic reasons | RFC 9748 | | 0xC902 | Reserved for historic reasons | RFC 9748 |
+---------------+------------------------------------+-------------+ +---------------+------------------------------------+-------------+
| 0xF000-0xFFFF | Reserved for Experimental Use | RFC 9748 | | 0xF000-0xFFFF | Reserved for Private or | RFC 9748 |
| | Experimental Use | |
+---------------+------------------------------------+-------------+ +---------------+------------------------------------+-------------+
Table 1 Table 1
5. Security Considerations 5. Security Considerations
This document adds no new security considerations, as they are This document adds no new security considerations, as they are
defined in the document that defines the extension. See the defined in the document that defines the extension. See the
References column of the appropriate IANA registry. References column of the appropriate IANA registry.
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