I need to configure my router to act as NTP server but I need to understand the commands exactly when I issue the command
ntp master x
where x is the stratum number and in Cisco routers it is between 1 and 15.
I need to know how I can detrmine the stratum number?? and what is the deffierence? I know the meaninig of stratm 0,1,2 and 3 but for example what is the meaning of 5 or 10 what is the advantage and disadvantage of that?
I knew that the stratum level defines its distance from the reference clock. isit added to cisco routers if I need to build NTP networks?? and what is the best practice for that?
and if I just add the command: ntp master ( without the stratum number, what is the value?)
Thank you for your reply,
I already know the meaning of stratum and level 1,2 and 3.
but as I mensioned eralier in Cisco router you can define stratum number between 1 and 15.
and this my question?
when I should use 1 and when I should use 2 or 10 or 15?
is it for configuring NTP networks??
Let me try to explain what is startum is hope that will answer your question to configure starum number in ntp server acting switches,
The stratum is a measure for synchronization distance. Opposed to jitter or delay the stratum is a more static measure. Basically (and from the perspective from a client) it is the number of servers to a reference clock. So a reference clock itself appears at stratum 0, while the closest servers are at stratum 1. On the network there is no valid NTP message with stratum 0.
A server synchronized to a stratum n server will be running at stratum n + 1. The upper limit for stratum is 15. The purpose of stratum is to avoid synchronization loops by preferring servers with a lower stratum.
So it's upto you how you configure your ntp server with startum vlaue.
Hope to Help !!