An engineer completed the basic installation for two Cisco CMX servers and is in the process of configuring high availability, but it fails. Which two statements about the root of the issue are true? (Choose two.)
A.
The Cisco CMX instances are installed in the same subnet.
B.
The types of the primary and secondary Cisco CMX installations differ.
C.
The delay between the primary and secondary instance is 200 ms.
D.
The sizes of the primary and secondary Cisco CMX installations differ.
Answer is correct: https://www.cisco.com/c/en/us/td/docs/wireless/mse/10-6/cmx_config/b_cg_cmx106/managing_cisco_cmx_system_settings.html
Pre-requisites for HA
Both the primary and the secondary server should be of the same size and the same type (VM or physical appliance).
Both the primary and the secondary server should have the same Cisco CMX version.
Both the primary and the secondary server should be connected on the same subnet.
Both the primary and the secondary server should be connected on the same subnet if Layer 2 HA is required.
Both the primary and the secondary server should be IP connected with delay of less then 250ms if Layer 3 HA is used.
From Cisco CMX release 10.6.2, NTP server settings must be configured on both Primary and Secondary server instance before HA pairing starts. We recommend that you use the same NTP server on both Primary and Secondary. As a Cisco CMX admin you can also use a dedicated NTP for Primary and Secondary.
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