[ntp:questions] Working out the stratum / what stratum is an NTP server on?

Brad Knowles brad at stop.mail-abuse.org
Wed Aug 24 19:24:22 UTC 2005

At 5:35 AM -0700 2005-08-24, volatileacid at gmail.com wrote:

>  Can someone tell me how it is that one deduces that stratum of an NTP
>  server. I have a list of public ones to work from.

	If you run an NTP server, your "syspeer" is the upstream time 
server to which you are synchronized.  Whatever their stratum is, 
yours is theirs plus one.  If they are Stratum 1, then you are 
Stratum 2.  If they are Stratum 5, then you are Stratum 6.

	This race ends at 15 -- Stratum 16 is defined to be the 
equivalent of completely unsynchronized.

	If you read the official documentation (see 
<http://www.eecis.udel.edu/~mills/ntp/html/index.html>) and the FAQ 
(see <http://www.ntp.org/ntpfaq/NTP-a-faq.htm>), you should be able 
to find the answer to this and other questions.  You may also be 
interested in the Community Supported documentation provided as a 
part of the NTP Public Services Project at 

Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <http://www.sage.org/> for more info.

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