The operator observes that the Health Score for a particular Virtual Service has a gray background and no numeric value. What is the explanation for the state of this Health Score?

Question

Options

• AThe Service Engines on which the Virtual Service is placed have lost connection to the Controller.
• BAll of the servers in the Virtual Service's configured Pools are down.
• CThe Virtual Service has been disabled.
• DAll Service Engines in the Service Engine Group are at maximum capacity, preventing the Virtual

• A
  2% (1)
• B
  86% (37)
• C
  5% (2)
• D
  7% (3)

Explanation

Option B is correct because when all pool servers are down, the Avi (NSX Advanced Load Balancer) controller has no active traffic path to measure, so it cannot compute a meaningful Health Score - resulting in a gray background with no numeric value. A Health Score requires at least one functional server to generate performance data.

Why the distractors are wrong:

• A - If Service Engines lose connectivity to the Controller, the Controller loses visibility into VS state entirely; this produces a different alert/status indicator, not a gray Health Score with a blank value.
• C - A disabled Virtual Service displays a distinct "disabled" status (typically shown with its own icon or label), not a gray Health Score. Disabled and "no scoreable state" are separate conditions.
• D - SE Group capacity exhaustion causes the VS to fail placement or show degraded performance, which still generates a numeric (low) Health Score with a color indicator - not a blank gray one.

Memory tip: Think Gray = "Gone" - when all backend servers are gone (down), there's nothing left to score, so the Health Score field goes gray and empty. Any other failure state still has enough context to produce a number.

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