A. Virtual IP addresses are used to distinguish between cluster members.
D. A change in the virtual IP address happens when a FortiGate device joins or leaves the cluster.
FortiGate Infrastructure 7.2 Study Guide (p.301):
"FGCP automatically assigns the heartbeat IP addresses based on the serial number of each device. The IP address 169.254.0.1 is assigned to the device with the highest serial number."
"A change in the heartbeat IP addresses may happen when a FortiGate device joins or leaves the cluster."
"The HA cluster uses the heartbeat IP addresses to distinguish the cluster members and synchronize data."
Reference and download study guide:
https://ebin.pub/fortinet-fortigate-infrastructure-study-guide-for-fortios-72.html
Answer A and D.
A. Virtual IP addresses are used to distinguish between cluster members. [CORRECT]
"The HA cluster uses the heartbeat IP addresses TO DISTINGUISH THE CLUSTER MEMBERS and synchronize data."
B. Heartbeat interfaces have virtual IP addresses that are manually assigned. [WRONG]
"FGCP AUTOMATICALLY assigns the heartbeat IP addresses based on the serial number of each device."
C. The primary device in the cluster is always assigned IP address 169.254.0.1. [WRONG]
"The IP address 169.254.0.1 is assigned to the device with the HIGHEST SERIAL NUMBER."
D. A change in the virtual IP address happens when a FortiGate device joins or leaves the cluster. [CORRECT]
"A change in the heartbeat IP addresses may happen when a FortiGate device joins or leaves the cluster."
Reference: FortiGate 7.4 Study Guide
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