F5 Pool Member Status/Configurations - TMOS 201 Flashcards
What is a green circle status?
The pool member is enabled and in an up state.
What is a yellow triangle status?
The pool member is enabled and no user interaction is needed. This occurs when the number of concurrent connections exceed the limit defined in the pool members Connection Limit setting.
What is a red diamond status?
The pool member is unavailable either the parent node is down, a monitor has marked the pool member down, or a user has disabled the pool member.
What is a black circle status?
The pool member is offline because it was manually disabled. The pool member will continue to accept new connections with a persistence record (cookie) or connections that already have been established.
What is a black diamond status?
The pool member is forced offline because it was manually disabled. No new connections are allowed, but it will continue to serve existing connections.
What is a blue square status?
The availability of the object is unknown.
What are gray icon status?
A parent object has disabled the object or the object is enabled but unavailable because of another disabled object.
What is slow ramp time?
Pool setting protects a newly available pool member from being overloaded with connection requests. For every second that the pool member is up, 1/10 of connections would be sent to the member. If the member has been up for 9 secs, then 90% of normal traffic is sent to this member.
True or false: slow ramp time is an enabled by default, and default setting is 10 seconds.
True
What is priority group activation?
Configuration where the BIG-IP will not to send traffic to a pool member (standby pool). The BIG-IP would only send traffic to this pool member when the active pool member goes down.
True or false: priority group activation is enabled by default.
False
For priority group activation configuration, what number would be assigned to member to make it standby? What number would be assigned to the active member?
Standby member = 0
Active member = 10
How do you configure priority group activation?
1) Under the Pool Members tab, choose a load balancing method and set priority group activation to enabled, and choose less than. Assign a value that indicates the minimum of active members before going to the next group (standby member).
2) Click on the member and assign a value designating it standby or active. 0 is standby, and anything above 0 is active.
What is Availability requirement?
It is used to specify the minimum number of monitors that must report a pool as being available before the member is defined as being in an up state.
If all of the monitors must report the pool available, select All.
To specify a minimum number, select At Least, and then type the minimum number in the Health Monitors field.
What is Action on Service Down?
A feature that allows the BIG-IP system to choose another pool member and rebind the client connection to a new server connection if the target pool member becomes unavailable.
