What is causing this issue?

An engineer is configuring a second Cisco FMC as a standby device but is unable to register with the active unit.

What is causing this issue?
A . The primary FMC currently has devices connected to it.
B . The code versions running on the Cisco FMC devices are different
C . The licensing purchased does not include high availability
D . There is only 10 Mbps of bandwidth between the two devices.

View Answer

Answer: B

Explanation:

https://www.cisco.com/c/en/us/td/docs/security/firepower/620/configuration/guide/fpmc-config-guide-v62/firepower_management_center_high_availability.html