Scenario: An administrator notices that each time the secondary node of a high availability
(HA) pair is restarted, the primary node shifts to a non-working state. The administrator runs

a command and collects the information displayed below: 1) Node ID. 0 IP: 172.31.250.10
Node State. NOT UP Master State. Secondary INC State. DISABLED Sync State.
DISABLED Propagation: ENABLED Enabled Interfaces : 1/5 1/1 1/2 1/4 0/1 Disabled
Interfaces : 1/3 HA MON ON Interfaces : 1/4 1/1 0/1 Interfaces on which heartbeats are not
seen : 1/4 1/1 1/2 1/5 0/1 Interfaces causing Partial FailurE. 1/4 SSL Card Status: UP Hello
Interval: 200 msecs Dead Interval: 3 secs Node in this Master State for: 0:0:0:35
(days:hrs:min:sec) 2) Node ID. 1 IP: 172.31.250.20 Node State. UNKNOWN/DOWN Master
State. UNKNOWN INC State. UNKNOWN Sync State. UNKNOWN Propagation:
UNKNOWN Enabled Interfaces : UNKNOWN Disabled Interfaces : UNKNOWN HA MON
ON Interfaces : UNKNOWN SSL Card Status: UNKNOWN What could be the cause of this
issue?

A.
One of the interfaces is disabled.

B.
One of the HA Monitoring interfaces is failing.

C.
The Hello Interval is set too high.

D.
Synchronization is disabled.