/mcp172.28.5.9 .INIT. 2 u 45 64 377 0.374 492.965 18.189 unsynchronised time server re-starting polling server every 64 s In order to fix the issue, Cisco recommends you use a Linux-based external NTP server or Cisco IOS® or Cisco IOS® XE NTP server and ensure that NTPv4 is configured. Here is a description of the NTP terminology in the NTP status output: The refid column indicates the remote's time source. LOCAL(0) is the local hardware clock. .INIT. means that initialization has not yet succeeded. • The st column is the stratum of the remote NTP server. 16 is an invalid stratum value that means, this server is not considered a time provider. The stratum can be invalid for various reasons. The most common of which is that the time provider not synchronized, the configured source does not exist, or the ntp server not running. • The t column indicates the server type (l: local; u: unicast; m: multicast, or b: broadcast). • The when column indicates how many seconds ago the remote was queried. • The poll column indicates the polling interval in seconds. For example, 64 means the remote is polled every 64 seconds. The shortest interval NTP uses is every 64 seconds and the longest is 1,024 seconds. The better an NTP source is rated over time, the longer the interval. (UC Implementation does not follow the interval defined here.) • The reach column indicates the trend of reachability tests in octal, where each digit, when converted to binary, represents whether a particular poll was successful (binary 1) or unsuccessful (binary 0). For example, 1 means only one poll has been done thus far, and it was successful. 3 (= binary 11) means the last two polls were successful. 7 (= binary 111) means the last three polls were successful. 17 ( = binary 1 111) means the last four polls were successful. 15 (= binary 1 101) means the last two polls were successful. The poll prior to that was unsuccessful, and the poll prior to that was successful. • The delay, offset, and jitter columns are the round-trip delay, dispersion, and jitter in milliseconds. • Diagnose NTP-Related Issues in CUCM Complete these steps in order to diagnose NTP-related issues: