101 · Question #27
The current status of a given pool member is nknown. Which condition could explain that state. The current status of a given pool member is .nknown. Which condition could explain that state.
The correct answer is A. The member has no monitor assigned to it.. A BIG-IP pool member displays an 'Unknown' status when no health monitor is assigned to it, because the system has no mechanism to actively determine availability.
Question
The current status of a given pool member is nknown. Which condition could explain that state. The current status of a given pool member is .nknown. Which condition could explain that state.
Options
- AThe member has no monitor assigned to it.
- BThe member has a monitor assigned to it and the most recent monitor was successful.
- CThe member has a monitor assigned to it and the monitor did not succeed during the most recent
- DThe member's node has a monitor assigned to it and the monitor did not succeed during the most
How the community answered
(41 responses)- A93% (38)
- B2% (1)
- D5% (2)
Why each option
A BIG-IP pool member displays an 'Unknown' status when no health monitor is assigned to it, because the system has no mechanism to actively determine availability.
When a pool member has no monitor assigned, the BIG-IP cannot perform health checks and therefore cannot classify the member as up or down, resulting in the 'Unknown' (blue) status that indicates an indeterminate health state.
A member with an assigned monitor whose most recent probe succeeded would show 'Available' (green), not 'Unknown', because the system has a positive health result.
A member with an assigned monitor whose most recent probe failed would show 'Offline' (red), not 'Unknown', because the system has a definitive negative health result.
A node-level monitor failure cascades to mark the associated pool members as 'Offline' (red), not 'Unknown', because the failure is a known negative state.
Concept tested: BIG-IP pool member Unknown status cause
Source: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-local-traffic-management-monitors-reference/about-the-monitor-status.html
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