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Exam F5CAB4 Topic 8 Question 51 Discussion

Actual exam question for F5's F5CAB4 exam
Question #: 51
Topic #: 8
What are the recommended methods for forcing a BIG-IP system to standby mode? (Choose two answers)

Suggested Answer: A,B Vote an answer

Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Administration documents:
BIG-IP provides two supported and documented methods to manually force a device into standby state in a high-availability (HA) configuration:
CLI method (A):
tmsh run /sys failover device standby
This is the correct and supported TMSH command to force the local device to transition from active to standby.
Configuration Utility method (B):
Navigating to Device Management > Devices > Local Device (Self) and selecting Force to Standby performs the same operation through the GUI and is fully supported.
Why the other options are incorrect:
C is incorrect: Traffic Groups do not provide a "Force to Standby" option for the local device; traffic groups are used to manage which device owns specific traffic, not to force device-level failover.
D is incorrect: tmsh run /sys failover standby is not a valid TMSH command. The correct syntax requires device standby.
Thus, the correct answers are A and B.

by Lyle at Sep 13, 2026, 09:13 PM

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