ACSP Virtual Router Redundancy (VRRP) 3

Question 1

What is the virtual MAC address format used by VRRPv2?

Accepted Answer

00-00-5E-00-01-{VRID}

Answer

VRRPv2 uses the virtual MAC format 00-00-5E-00-01-{VRID} where VRID is the Virtual Router Identifier in hex.

Question 2

In VRRPv3, which significant improvement was made over VRRPv2?

Accepted Answer

Support for IPv6 and sub-second advertisement intervals

Answer

VRRPv3 (RFC 5798) added native IPv6 support and allows sub-second advertisement intervals for faster failover.

Question 3

What VRRP feature can be used to track an upstream interface so the master lowers its priority if the uplink fails?

Accepted Answer

VRRP object tracking

Answer

VRRP object tracking monitors a specified interface or route and decrements the VRRP priority if the tracked object goes down, triggering failover.

Question 4

When configuring VRRP on Aruba switches with object tracking, what happens to the VRRP master priority when the tracked interface goes down?

Accepted Answer

Priority decreases by the configured decrement value

Answer

When the tracked object fails, the master's priority is reduced by the configured decrement, potentially causing a backup with higher resulting priority to preempt.

Question 5

In a two-router VRRP setup, both routers report as master simultaneously. What is the most likely cause?

Accepted Answer

The advertisement multicast traffic between the routers is blocked

Answer

A split-brain scenario (dual masters) typically occurs when VRRP advertisement multicasts cannot reach each other, causing each router to believe the other has failed.

(ACSP) Aruba Certified Switching Professional Practice Test

(ACSP) Aruba Certified Switching Professional Practice Test

ACSP Virtual Router Redundancy (VRRP) 3