101 · Question #520

101 Question #520: Real Exam Question with Answer & Explanation

The correct answer is A: MAC masquerading. MAC masquerading on a BIG-IP HA pair assigns a shared virtual MAC address so that failover occurs without forcing upstream devices to re-learn ARP entries, minimizing traffic interruption.

Section 3: Load Balancing and High Availability Basics

Question

What should a BIG-IP Administrator configure to minimize impact during a failure?

Options

AMAC masquerading
BClone pool
CExternal monitors
DOne Connect profile

Explanation

MAC masquerading on a BIG-IP HA pair assigns a shared virtual MAC address so that failover occurs without forcing upstream devices to re-learn ARP entries, minimizing traffic interruption.

Common mistakes.

B. A clone pool mirrors traffic to a secondary destination for inspection or logging and has no function in reducing the network impact of a failover event.
C. External monitors are custom health-check scripts used to determine pool member availability but do not affect how quickly or smoothly a failover transition occurs.
D. A OneConnect profile reuses server-side TCP connections to reduce overhead, which is a performance optimization that does not address failover disruption.

Concept tested. BIG-IP HA MAC masquerading for failover impact reduction

Reference. https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-device-service-clustering-administration/mac-masquerade.html

Topics

#MAC masquerading#high availability#failover#BIG-IP HA

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