[ntpwg] REQUEST FOR TEXT - Protocol Doc Changes

Danny Mayer mayer at ntp.isc.org
Mon Nov 12 05:23:49 GMT 2007


Jim Martin wrote:
> Gentlepeople,
> 	Based upon the notes (and my recollection) from the meeting in  
> Chicago, there were four  main points to be addressed in the next (and  
> hopefully final) rev of the protocol spec.  They were:
> 
>> Comments/Questions from Floor:

>> -Comment from Tony Hain, refid should not be associated with IP  
>> address
>> *Jim believes that text in draft is OK
>> *It was agreed that this will be verified
>   	Tony was concerned that this was a v4 only dependancy. As seen in  
> the following quote from the text, that's not the case. No change  
> required.
> 
> "Above stratum 1 (secondary servers and clients) this is the reference  
> identifier of the server and can be used to detect timing loops. If  
> using the IPv4 address family, the identifier is the four-octet IPv4  
> address. If using the IPv6 address family, it is the first four octets  
> of the MD5 hash of the IPv6 address."
> 

This is the current practice in the NTP reference implementation but it
is not required to be. It could, for example be the first 4 octets of
the MD5 hash of the MAC address. Anything may be used as long as it's
consistent.

> 
>> -Comment from Stewart Bryant:  need to specify precisely the start bit
>> * Yakov and Stewart Bryant agreed to contribute text to resolve this  
>> issue
> 
> 	This is where I'm looking for input from the community. Yakov,  
> Stewart, Rich Osman, or anyone who has a good grasp on the issue and  
> can generate a few lines to precisely characterize the details.  This  
> is currently the blocker on getting this out.
> 

It would help to know what start bit you are talking about. I have no
idea. Does someone have a reference to a section of the draft?

Danny


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