F5CAB1 Install, Initial Configuration, and Upgrade Practice Question
An administrator needs to upgrade a VIPRION chassis running TMOS v14.1 to v16.1. Before initiating the software installation, what critical step must be performed on the blade architecture to ensure a successful upgrade without split-brain cluster issues?
⚠ Common exam trap
Candidates assume upgrading the primary blade is sufficient. In a VIPRION chassis, failing to provision all blades leads to version mismatches that cause cluster instability and split-brain scenarios.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Provision all software slots on every individual blade within the chassis with the target TMOS version image before activating.
VIPRION chassis deployments require independent software installations on both the primary and secondary slots to maintain operational synchronicity across the cluster. Failing to install the target image on all constituent blades before booting into the new version causes version mismatches, cluster communication failures, and potential split-brain conditions that disrupt enterprise traffic processing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Disable high availability stateful mirroring across all virtual servers to prevent packet buffer corruption during slot reboot.
Why it's wrong here
Stateful connection mirroring replicates active session data between redundant high availability peers and has no direct dependency on individual blade firmware installation procedures. Disabling mirroring does not prevent the cluster split-brain scenarios caused by running mismatched TMOS versions across slots.
- ✗
Eject the secondary blades from the chassis physically until the primary blade finishes the complete TMOS installation.
Why it's wrong here
Physically removing blades from an active enterprise VIPRION chassis causes hardware topology faults and unbalances the processing capacity without resolving software version synchronization requirements. All blades must remain installed and receive the target image sequentially or concurrently.
- ✓
Provision all software slots on every individual blade within the chassis with the target TMOS version image before activating.
Why this is correct
VIPRION systems require identical software images and configurations present across all active slots to ensure seamless clustering and traffic distribution. Installing the target image on every blade prior to activation prevents version incompatibility and maintains cluster stability.
- ✗
Convert the multi-slot chassis into a standalone non-clustered architecture through the command line interface temporarily.
Why it's wrong here
Dissolving the chassis cluster removes the high-availability and traffic-group failover configuration that TMOS upgrades must preserve across slots, risking exactly the split-brain state the stem warns against. It is tempting because standalone installation avoids inter-blade version mismatch, and that approach would suit a single-blade appliance being upgraded in isolation.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official F5 exam blueprint
This F5CAB1 practice question is part of Courseiva's free F5 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the F5CAB1 exam.