cisco device as ntp server

Most of Cisco devices can act as NTP sources for time synchronisation within a network. To achieve this you need to so some configuration:

! set NTP SOURCE e.g. internet
conf t
ntp server
! check ntp config
sh ntp associations

      address         ref clock     st  when  poll reach  delay  offset    disp
*~     2     0   128  177    70.0   -5.52   126.0
 * master (synced), # master (unsynced), + selected, - candidate, ~ configured
! get more information
sh ntp status
Clock is synchronized, stratum 3, reference is
nominal freq is 119.2092 Hz, actual freq is 119.2094 Hz, precision is 2**18
reference time is D1A6519D.DA7EB9F5 (01:20:13.853 DE Sat Jun 18 2011)
clock offset is -4.7475 msec, root delay is 82.61 msec
root dispersion is 47.88 msec, peer dispersion is 5.75 msec


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