201 · Question #325
Which action will take place when a failover trigger is detected by the active system?
The correct answer is A. The active device will take the action specified for the failure. When an active system detects a failover trigger, it initiates the failover process based on its pre-configured failover settings.
Question
Which action will take place when a failover trigger is detected by the active system?
Options
- AThe active device will take the action specified for the failure.
- BThe standby device also detects the failure and assumes the active role.
- CThe active device will wait for all connections to terminate and then failover.
- DThe standby device will begin processing virtual servers that have failed, but the active device will
How the community answered
(43 responses)- A91% (39)
- B2% (1)
- C5% (2)
- D2% (1)
Why each option
When an active system detects a failover trigger, it initiates the failover process based on its pre-configured failover settings.
In a high-availability (HA) setup, the active device continuously monitors its own health and critical resources. Upon detecting a failover trigger, such as a hardware failure or service disruption, the active device executes the predefined failover action, which typically involves relinquishing its active role and signaling the standby device to assume it.
The standby device doesn't necessarily detect the same failure simultaneously and assume the active role independently; it typically transitions to active after the current active device signals a failover or becomes unresponsive.
Waiting for all connections to terminate would delay failover and potentially cause significant downtime, which contradicts the purpose of immediate failover for high availability.
The standby device assumes the active role for the entire system, not just for specific failed virtual servers, and the active device does not continue processing when a failover occurs.
Concept tested: High Availability (HA) failover trigger response
Source: https://techdocs.f5.com/en-us/bigip-15-1-0/big-ip-system-high-availability-configuration/understanding-failover-concepts.html
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