101 · Question #520
What should a BIG-IP Administrator configure to minimize impact during a failure?
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.
Question
What should a BIG-IP Administrator configure to minimize impact during a failure?
Options
- AMAC masquerading
- BClone pool
- CExternal monitors
- DOne Connect profile
How the community answered
(27 responses)- A81% (22)
- B7% (2)
- D11% (3)
Why each option
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.
MAC masquerading configures a floating virtual MAC address shared between the active and standby BIG-IP units. When a failover event occurs, the standby unit takes over using the same MAC address, so routers and switches continue forwarding traffic without ARP reconvergence delay, significantly reducing the impact and duration of the failure.
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.
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.
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
Source: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-device-service-clustering-administration/mac-masquerade.html
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