[ntpwg] Additional text for SNTP

[Greg Dowd]

Is it actually true in 4330 that a sntp client cannot be a sntp server.
I thought that it said that it was designed to operate at the "edges" of
the network, without a constraint that it couldn't do a stratum2
function explicitly stated.  

I understand the logic, but I believe the addition of text to constrain
operation is a NEW idea for ntpv4.

 


Greg Dowd
gdowd at symmetricom dot com (antispam format)
Symmetricom, Inc.
www.symmetricom.com
"Everything should be made as simple as possible, but no simpler" Albert
Einstein

-----Original Message-----
From: ntpwg-bounces+gdowd=symmetricom.com at lists.ntp.org
[mailto:ntpwg-bounces+gdowd=symmetricom.com at lists.ntp.org] On Behalf Of
David L. Mills
Sent: Friday, March 28, 2008 11:28 AM
To: NTP Working Group
Subject: Re: [ntpwg] Additional text for SNTP

Danny,

I'm not sure any words are necessary. An SNTP client is ipso facto a
client and by spec sends only mode-3 messages. We have defined an SNTP
server and an SNTP client, but not an SNTP peer. Also, I'm a little
uneasy about saying what an SNTP client can or cannot accept. It can't
have dependent clients, so in truth we don't care what it does with the
server packet other than to say if it follows the peer process rules it
will make good clock.

Dave

Danny Mayer wrote:

> I'd like to propose additional text be added to section 14 on SNTP in 
> the NTPv4 protocol draft. I'm requesting this addition due to an issue

> that came up last week with an SNTP client.
>
> Suggested text:
>
> "An SNTP client MUST only send mode 3 packets (client) and MUST only 
> accept mode 4 (server) and mode 5 (broadcast) packets. An SNTP client 
> MAY send or receive mode 6 (NTP control) packet. All other packet 
> modes MUST be ignored.
>
> An SNTP server MUST not send mode 3 (client) packets."
>
> Any objections or refinements?
>
> Danny
> _______________________________________________
> ntpwg mailing list
> ntpwg at lists.ntp.org
> https://lists.ntp.org/mailman/listinfo/ntpwg


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