Can I configure two ntp servers as a source for a switch?

[YetinayetBitew87488]

Hey guys,

Can I configure two different ntp servers as a time source for my cisco 9500 Switch at the same time? like below? Thanks.

ntp server 10.110.70.14 priority 1
ntp server 10.110.70.13 priority 2
ntp enable

[marce1000]

 - Leave the priority statements aside, the device will use the ntp server offering the best stratum value , 

 M.

[joelm]

You can have as many NTP servers as you want (up to about 15? or so). NTP will poll all of them and figure out the best source of time.

Here's my configuration:

switch#show run | incl ntp
ntp server 98.191.213.2
ntp server 98.191.213.7
ntp server 98.191.213.12
ntp server 98.191.213.14

switch#show ntp associations 
  address         ref clock       st   when   poll reach  delay  offset   disp
+~98.191.213.2    .GPSD.           1     58     64   377  1.534   0.584  2.441
+~98.191.213.7    .GPS.            1     41     64   377  1.487   0.726  3.865 
+~98.191.213.12   .GPSD.           1     10     64   377  1.475   0.643  5.100
*~98.191.213.14   .GPSD.           1     41     64   377  1.934  -0.149  2.877
 * sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured

For the best time, you want to pick NTP servers that are "close" to you, network-wise.

Feel free to use those IPs if you like; they are all in the Public NTP pool and are located in Virginia.