Re: [Ntp] Antw: [EXT] Re: Quick review of WGLC for status change for draft-ietf-ntp-update-registries

[Heiko Gerstung <[e-mail]>]

OK, I checked and found out that the ntpq tool in 4.2.8p13 is sending all queries with VN=2 - therefore ntpd is responding with the same version. 

As it seems, there is no standard describing/defining mode 6 or mode 7, so maybe we should treat both as "vendor/implementation specific"?

Regards,
  Heiko

Am 16.08.22, 13:10 schrieb "ntp im Auftrag von Heiko Gerstung" <[e-mail] im Auftrag von heiko.gerstung=[e-mail]>:

    The RFC says 
    " VN Version Number (version): 3-bit integer representing the NTP
       version number, currently 4."

    It does not make any exceptions for different modes, so why should the meaning of the version number field be different for mode 6 packets? I did not find anything in RFC5905 about mode 6 packets. 

    Regards,
      Heiko

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    Am 16.08.22, 11:22 schrieb "ntp im Auftrag von Harlan Stenn" <[e-mail] im Auftrag von [e-mail]>:

        On 8/16/2022 2:09 AM, Ulrich Windl wrote:
        >>>> Harlan Stenn <[e-mail]> schrieb am 15.08.2022 um 23:53 in Nachricht
        > <[e-mail]>:
        > ...
        >> So if we're a V4 server and we get a v5 request, we will respond with a
        >> v4 packet that says v5.
        >>
        >> This is consistent with the design.
        >>
        >> No one has seen a v1 packet format in a very long time.  The v1 stuff
        >> folks are seeing now are v[234] packets claiming to be v1.
        >>
        >> The format of the base packet saw a slight change going from v2 to v3
        >> (sync dispersion was replaced by estimated drift rate), and there was
        >> (TTBOMK) no change to the base packet from v3 to v4.
        >>
        >> The change from v2 to v3 caused no problems that I can recall, and even
        >> so, I'm unaware of ANY surviving v2 servers out there.
        > 
        > Well, ntpq 4.2.8p15 is using version==2 when doing mode 6 queries, so there are V2 packets!

        What exactly does the version field mean in a mode 6 packet?

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