101 · Question #503
HTTP pool attached to a Virtual Server has three members Pool member. - A default HTTP monitor in red - Pool member 6 custom HTTP monitor in green - Pool member C does not monitor Which pool members p
The correct answer is C. Pool members B and C. In F5 BIG-IP, a pool member with a failed (red) monitor is marked down and removed from load balancing, while a member with no monitor is always considered available.
Question
HTTP pool attached to a Virtual Server has three members Pool member.
- A default HTTP monitor in red
- Pool member 6 custom HTTP monitor in green
- Pool member C does not monitor
Which pool members participate in the load balancing?
Options
- APool members A and C
- BPool members A B and C
- CPool members B and C
- DPool members A and B
How the community answered
(63 responses)- A5% (3)
- B21% (13)
- C65% (41)
- D10% (6)
Why each option
In F5 BIG-IP, a pool member with a failed (red) monitor is marked down and removed from load balancing, while a member with no monitor is always considered available.
Pool member A has a red (failed) monitor and is marked down, so it is excluded from load balancing despite pool member C being included.
Pool member A cannot participate because its default HTTP monitor is red, indicating the health check is failing and BIG-IP has removed it from the active pool.
Pool member B has a green custom HTTP monitor, meaning it is passing health checks and is active in the load balancing pool. Pool member C has no monitor assigned, so BIG-IP treats it as always up by default and includes it in load balancing. Pool member A has a red (failed) monitor, so BIG-IP marks it down and excludes it from receiving traffic.
Pool member C participates because a missing monitor defaults to always-up status, and pool member A is excluded due to its failed red monitor.
Concept tested: F5 BIG-IP pool member health monitor status and load balancing participation
Source: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-local-traffic-management-monitors-reference.html
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