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101 · Question #65

101 Question #65: Real Exam Question with Answer & Explanation

The correct answer is B: Whether or not network failover is enabled, the standby system will stay in standby mode.. When the failover cable is functional and communicating, the standby system receives direct confirmation that the active unit is operational, so it remains in standby regardless of network failover settings.

Question

Assuming that systems are synchronized, which action could take place if the failover cable is connected correctly and working properly, but the systems cannot communicate over the network due to external network problems.

Options

  • AIf network failover is enabled, the standby system will assume the active mode.
  • BWhether or not network failover is enabled, the standby system will stay in standby mode.
  • CWhether or not network failover is enabled, the standby system will assume the active mode.
  • DIf network failover is enabled, the standby system will go into active mode but only until the

Explanation

When the failover cable is functional and communicating, the standby system receives direct confirmation that the active unit is operational, so it remains in standby regardless of network failover settings.

Common mistakes.

  • A. Network failover only triggers a standby-to-active transition when the active unit cannot be reached by any path, but the working failover cable still provides a live heartbeat, preventing any transition.
  • C. The standby system will not unconditionally assume active mode because the functional failover cable confirms the active system is still running, negating any trigger condition for failover.
  • D. No temporary active-mode takeover occurs because the failover cable communication remains intact and the active system is verified as operational, removing the condition that would cause even a temporary failover.

Concept tested. HA failover cable behavior vs network failover

Reference. https://techdocs.f5.com/en-us/bigip-14-1-0/big-ip-device-service-clustering-administration/configuring-a-failover-vlan.html

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