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201 · Question #23

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.. This question investigates the specific condition that results in a BIG-IP pool member displaying an 'unknown' status, indicating that its health cannot be determined.

Section 2: Configure Load Balancing Features

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 timeout
  • DThe member's node has a monitor assigned to it and the monitor did not succeed during the most recent

How the community answered

(56 responses)
  • A
    91% (51)
  • B
    5% (3)
  • C
    2% (1)
  • D
    2% (1)

Why each option

This question investigates the specific condition that results in a BIG-IP pool member displaying an 'unknown' status, indicating that its health cannot be determined.

AThe member has no monitor assigned to it.Correct

When a pool member has no health monitor assigned to it, either directly or inherited from its pool, the BIG-IP system cannot actively determine its availability or health status. In such a scenario, the pool member's status will be displayed as 'unknown' because there is no mechanism in place to check its operational state.

BThe member has a monitor assigned to it and the most recent monitor was successful.

If a member has a monitor assigned and it was successful, the status would be 'available' (green), not 'unknown', indicating the member is healthy.

CThe member has a monitor assigned to it and the monitor did not succeed during the most recent timeout

If a member has a monitor assigned and it failed, the status would be 'unavailable' (red) or 'down', not 'unknown', explicitly indicating the member is not healthy.

DThe member's node has a monitor assigned to it and the monitor did not succeed during the most recent

A node's monitor status affects the node's availability, but if a pool member itself has no monitor, its specific service health is not checked, resulting in an 'unknown' status regardless of node monitoring.

Concept tested: BIG-IP pool member 'unknown' status

Source: https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-local-traffic-management-concepts/monitors.html#monitor-states-and-icons

Topics

#health monitor state#pool member status#unknown status

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