Refer to the exhibit. An engineer runs the utils diagnose test CLI command on a Cisco UCM subscriber and receives an error message during the validate_network test. What are two causes of the error? (Choose two.)
A.
The DNS server is missing PTR records for the Cisco UCM servers.
B.
A failure is expected when the utils diagnose test command is run on a subscriber.
C.
The DNS server has multiple PTR records for the Cisco UCM servers.
D.
The DNS servers are unreachable from the Cisco UCM server.
E.
The firewall is blocking UDP port 53 traffic from Cisco UCM to the DNS servers.
Based on the output DNS server is reachable, do it should be A and C. If you have PTR pointing to multiple hosts the you'll get the same error as with no PTR configured.
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Bazant
1 week, 3 days ago