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18.9 Verifying NTP
Verifying NTP Section 18: Implementing Device Hardening To display the status of NTP associations on Cisco devices, use the show ntp associations command in privileged EXEC mode: R2# show ntp associations address ref clock st when poll reach delay offset disp *~10.1.1.1 .LOCL. 1 13 64 377 1.472 6.071 3.629 * sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured The output of the show ntp associations command provides the following information: The asterisk (*) indicates that R2 is synchronized with the NTP server with IP address 10.1.1.1. The tilde (~) indicates that NTP server 10.1.1.1 is statically configured. It may take several minutes for an NTP client to synchronize with the NTP server. To display the status of NTP on Cisco devices, use the show ntp status command in user EXEC mode: R2# show ntp status Clock is synchronized, stratum 2, reference is 10.1.1.1 nominal freq is 119.2092 Hz, actual freq is 119.2092 Hz, precision is 2**17 reference time is D40ADC27.E644C776 (13:18:31.899 UTC Mon Sep 24 2012) clock offset is 6.0716 msec, root delay is 1.47 msec root dispersion is 15.41 msec, peer dispersion is 3.62 msec loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000000091 s/s system poll interval is 64, last update was 344 sec ago. The output of the show ntp status command shows that R2 is synchronized to an NTP device. The "reference" is the address of the NTP device with which the clock is synchronized. R2# show ntp associations address ref clock st when poll reach delay offset disp ~10.1.1.1 .LOCL. 1 13 64 377 1.472 6.071 3.629 * sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured Content Unavailable This content is unavailable in this version of the course. Up Next: Extended Discovery