[ntp:questions] Is a packet with stratum 1 allowed to contain a KoD code?

David L. Mills mills at udel.edu
Sun Jul 25 17:42:26 UTC 2010


Danny,


KoD packets have the leap bits set to 3 (unsynchronized); the stratum is 
not signficant. The reference implementation sets the stratum to 16 for 
the RATE kiss code. However, packet stratum 16 is mapped to stratum 0 as 
visible to the monitoring function. Codes like INIT and STEP are used as 
labels for associations and used only for monitoring purposes.

Dave

Danny Mayer wrote:

>On 7/19/2010 8:43 AM, Christer Eriksson wrote:
>  
>
>>Hi,
>>Is an NTP packet with stratum set to 1 ever allowed to contain a kiss of
>>death code? I got a server (NTPv4) that sends NTP packets with stratum 1 and
>>KoD codes like INIT or STEP and I fail to find a confirmation in any RFC
>>relating to version 4 of NTP whether this is allowed or not.
>>
>>    
>>
>
>See RFC5905 Section 7.4 for KOD packets. This has nothing to do with
>Stratum. Why would you assume that Stratum 1 is somehow exempt? INIT and
>STEP are just states of the server and it is instructing the client that
>it is not yet ready to deliver accurate timestamps.
>
>Danny
>
>  
>
>>Thanks & Best Regards
>>Christer Eriksson
>>    
>>
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