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Re: [Ntp] Antw: Re: Antw: [EXT] Local time in NTPv5?

Hal Murray <halmurray@sonic.net> Mon, 01 August 2022 00:20 UTC

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To: James <james.ietf@gmail.com>
cc: Hal Murray <halmurray@sonic.net>, "ntp@ietf.org" <ntp@ietf.org>
From: Hal Murray <halmurray@sonic.net>
In-Reply-To: Message from James <james.ietf@gmail.com> of "Mon, 01 Aug 2022 00:55:42 +0200." <BF45EFF3-E992-4C4E-BB80-78061B60678F@gmail.com>
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Subject: Re: [Ntp] Antw: Re: Antw: [EXT] Local time in NTPv5?
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> It would be very much appreciated if you could dig out the RFC number or
> point to wherever DHCP specification...

>From Miroslav Lichvar <mlichvar@redhat.com>
Date: Fri, 29 Jul 2022 09:51:32 +0200 (00:51 PDT)

> You mean the TZ POSIX string (option 100) from RFC4833? That looks like it
> could work, even for announcing the DST change. 

>From https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-paramete
rs.xhtml
You want slots 100 and 101:
 100  PCode  N  IEEE 1003.1  TZ String 	[RFC4833]
 101  TCode  N  Reference to the TZ Database  [RFC4833]

RFC 4833 is titled Timezone Options for DHCP




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