After an engineer runs the utils ntp status command on the Cisco Unified Communications Manager publisher, the stratum value is 16. Which issue can the Cisco Unified CM cluster experience?
A.
Unified CM sends an NTPv4 packet.
B.
Database replication is not synchronized on the Unified CM nodes.
C.
The cluster loses access to port 124 at the firewall.
D.
The date/time group on all phones defaults to the time zone of the engineer.
Correct answer is B:
16 is a 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".
CUCM can communicate with the NTP server on Port 123
Correct Answer:
B. Database replication is not synchronized on the Unified CM nodes
Page Reference :
This issue is discussed in Chapter 14 of the Cisco Press guide on Pages 337-338. A stratum value of 16 indicates that the Cisco Unified CM cannot reach the NTP server, causing synchronization issues between the publisher and subscriber nodes. One of the critical issues that can arise is database replication not being synchronized across the cluster.
Your ntp test will fail at level 5, recommended to have is 3 or higher
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