Virtual Router Redundancy (VRRP) Flashcards

In VRRP, what happens when a backup router receives an advertisement with a priority lower than its own?

Answer: It immediately becomes the master

A backup router will preempt and become master if it receives an advertisement with a priority lower than its own, provided preemption is enabled.

Which VRRP timer controls how long a backup router waits before declaring the master as down?

Answer: Master-down interval

The master-down interval (skew time + 3 × advertisement interval) determines when a backup declares the master as down.

What is the VRRP skew time used for?

Answer: Staggering master-down timers among backup routers based on priority

Skew time staggers master-down timers among backup routers so that higher-priority backups take over before lower-priority ones.

On an ArubaOS-Switch, which command verifies the current VRRP master for VRID 10 on VLAN 20?

Answer: show vrrp vlan 20 vrid 10

The 'show vrrp vlan vrid ' command displays the current VRRP role, priority, and master IP for the specified VRID.

What is the default VRRP advertisement interval on Aruba switches?

Answer: 1 second

The default VRRP advertisement interval is 1 second, during which the master sends multicast hellos to keep backups informed.

A VRRP group is configured with two routers: Router A at priority 120 and Router B at priority 90. If Router A fails and later recovers, what occurs when preemption is enabled?

Answer: Router A reclaims the master role after recovery

With preemption enabled, a recovering router with higher priority will send advertisements and reclaim the master role from the current lower-priority master.

Which statement is TRUE about VRRP and ARP in a standard deployment?

Answer: Only the VRRP master responds to ARP requests for the virtual IP

Only the VRRP master responds to ARP requests for the virtual IP address, ensuring hosts point to a single active gateway.