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101 · Question #141
101 Question #141: Real Exam Question with Answer & Explanation
The correct answer is D: Associate a default pool to the virtual server and assign a successful monitor to the pool. A BIG-IP virtual server shows Unknown (Blue) when its availability cannot be determined - typically because no monitored default pool is assigned to the virtual server itself.
Question
The BIG-IP ASM System is configured with a virtual server that contains an HTTP class profile and the protected pool members are associated within the HTTP class profile pool definition. The status of this virtual server is unknown (Blue). Which of the following conditions will make this virtual server become available (Green)?
Options
- AAssign a successful monitor to the virtual server
- BAssign a successful monitor to the members of the HTTP class profile pool
- CAssociate a fallback host to the virtual server and assign a successful monitor to the fallback host
- DAssociate a default pool to the virtual server and assign a successful monitor to the pool
Explanation
A BIG-IP virtual server shows Unknown (Blue) when its availability cannot be determined - typically because no monitored default pool is assigned to the virtual server itself.
Common mistakes.
- A. Assigning a monitor to the virtual server itself is not a standard BIG-IP configuration - monitors are assigned to pools or pool members, not directly to virtual servers.
- B. The HTTP class profile pool's monitor determines traffic-path health but does not drive the parent virtual server's overall availability status, so it remains Unknown.
- C. A fallback host is a redirect destination for unavailable pools and does not provide a health-monitoring path that resolves an Unknown virtual server status.
Concept tested. BIG-IP virtual server availability status and default pool monitoring
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