From: Jay Hennigan (jay@west.net)
Date: Wed Sep 03 2003 - 01:51:53 GMT-3
On Wed, 3 Sep 2003, Paul Chen wrote:
> When I configure NTP stratum as 2 on the NTP master , the other routers show
> their stratum numbers as 3.
>
> Why does it always show 1 number higher ?
An NTP speaker is one stratum higher than the lowest stratum of its peers.
This is to reflect the relative precision. Stratum 1 is considered an
absolute reference clock. An NTP peer that clocks from one or more
stratum 1 sources will be stratum 2, and so on.
If you have a complex mesh, the lowest number of all of your peers wins,
you increment it by 1 and that's your stratum.
The concept is much like RIP routing, right down to 16 being infinity.
-- Jay Hennigan - CCIE #7880 - Network Administration - jay@west.net WestNet: Connecting you to the planet. 805 884-6323 WB6RDV NetLojix Communications, Inc. - http://www.netlojix.com/
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