>If I understand right, SNTP is the client implementation of the NTP
protocol?
SNTP can actually be a client or a server, it is "unreliable" (my word)
compared to NTP and some devices simply won't accept time from it.
RFC 1769 "The model for a SNTP server operating with either a NTP or
SNTP client is an RPC server with no persistent state. Since a SNTP
server ordinarily does not implement the full set of NTP
algorithms intended to support redundant peers and diverse network
paths, it is recommended that a SNTP server be operated only in
conjunction with a source of external synchronization, such as a
reliable radio clock."
Similarly, an SNTP client is one which receives time from a server, but
makes no independent assessment as to the quality of the data. It simply
assumes the server is authoritative.
Quoting Nick Maclaren who wrote an SNTP server-
"The client-side of SNTP is really just a description of some common
synchronisation methods that have been used since time immemorial,
applied to NTP. You don't HAVE to be as crude as the RFC implies,
though you can be.
The server-side of SNTP is really just a description of short cuts that
you could take in a dedicated stratum 1 time-server. If it were used
at another level, it should be described differently."
If you really want the nitty gritty, read the stuff Nick and David Mills
(father of NTP) write in comp.protocols.time.ntp or visit David's site.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Creamer, Mark
Sent: Thursday, February 17, 2005 1:46 PM
To: ActiveDir@mail.activedir.org
Subject: RE: [ActiveDir] W32Time and *nix
The ubiquitous "No Server Suitable for Synchronization Found". I've
found lots of questions about this
in my googling, but no definitive answers.
If I understand right, SNTP is the client implementation of the NTP
protocol? If that's true, how
could it serve time updates to anything? What's your understanding of
W32Time?
<mc>
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Mulnick, Al
Sent: Thursday, February 17, 2005 3:47 PM
To: 'ActiveDir@mail.activedir.org'
Subject: RE: [ActiveDir] W32Time and *nix
It can work, what problems are you having? What kinds of errors and
what
are you using?
W2K3 is supposed to answer for both IIRC, but that was in the archives.
There are still some nuances that might be getting in your way. You
know,
the nuances about how an RFC is interpreted when it says things like
"SHOULD" vs. "MUST" :)
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Creamer, Mark
Sent: Thursday, February 17, 2005 1:51 PM
To: ActiveDir@mail.activedir.org
Subject: [ActiveDir] W32Time and *nix
Folks, I'd like to throw this back out for comments if I can. A while
back I
asked about using our current W32Time server, the forest root AD box, as
the
authoritative time server for the non-Windows clients on our network. I
haven't had any luck getting this to work. If I remember correctly,
W32Time
is a derivation of the NTP protocol, (is it SNTP maybe??). Anyway,
nothing
I've tried enables the Linux and Unix boxes to sync with this server.
One
article I read said it will not work, but you obviously can't rely on
everything posted on the net :-)
Am I missing something, or do I need to maybe look at a 3rd party
solution
to handle all of the time services? What are some of you using for this
situation? Thanks!
Mark Creamer
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