[ntpwg] NTP Protocol Draft

[David L. Mills]

Jack,

The minimum and maximum poll intervals are determined by the stability 
envelope of the clock discipline algorithm. With the current design, the 
limits are 4 (16s) to 17 (36h). I doubt any other discipline will extend 
this interval; most will diminish that range. If the traffic model I 
suggested previously is believed, the minimum peak headway must be not 
less than two seconds and the minimum average headway not less than 15 
seconds. Thus, the minimum poll interval with burst mode is 256 seconds.

Dave

Burbank, Jack L. wrote:

> All:
>  
> An updated protocol draft can be found at:
>  
> http://www.innovationslab.net/~brian/drafts/draft-ietf-ntp-ntpv4-proto-02.txt
> This updated version has had several changes to address comments 
> received to date and to fill in holes in previous versions.  However, 
> there are still some items that require some attention.  In particular:
>  
> -there is a need to add a definition of NTPv4 Extension Fields, and a 
> description of already-defined extensions. 
>  
> -a decision on what elements we would like IANA to manage so we 
> can populate the IANA considerations section.  For example, do we 
> want IANA to manage the 4-character reference identifiers?  Do we 
> want IANA to manage kiss codes?  Anything else?  Feedback on this 
> subject would be appreciated.
>  
> -inclusion of guidance regarding the poll interval.  Right now, the 
> draft has a recommended maximum poll interval of (TBD).  In general, we 
> removed a lot of 'consideration' text as several 
> statements/discussions were overwhelmingly deemed as too 
> implementation-specific, and not necessary in a protocol specification.  
> However, I think guidance regarding the poll interval is appropriate.  
> We would appreciate feedback on appropriate poll interval guidance for 
> inclusion in the draft.
>  
> Regards,
> Jack
> 
> 
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