300-420 Question 67
Single answerYou are designing a campus network for a critical financial organization that requires high availability and minimal downtime. The network will include multiple VLANs, and redundancy is crucial for the default gateway configuration. Which First Hop Redundancy Protocol (FHRP) design would best meet these requirements?
- A
Use Hot Standby Router Protocol (HSRP) with one active and one standby router.
- B
Use Virtual Router Redundancy Protocol (VRRP) and configure multiple routers as active for load balancing.
- C
Implement Gateway Load Balancing Protocol (GLBP) to distribute traffic across multiple routers.
- D
Configure HSRP in standalone mode with preemption disabled for faster failover.
Show answer and explanation
Correct answer: C
Explanation
High availability and minimal downtime can be achieved using various FHRPs, but in this scenario, load balancing is also a critical requirement. Gateway Load Balancing Protocol (GLBP) is specifically designed to provide both redundancy and load balancing by allowing multiple routers to simultaneously act as gateways for different traffic flows. This makes it the best choice for the given scenario.
- A. Incorrect.
HSRP with one active and one standby router ensures high availability but does not provide load balancing, which is a key requirement in this scenario.
- B. Incorrect.
VRRP allows for high availability but typically does not offer true load balancing across multiple routers in its basic configuration.
- C. Correct.
GLBP provides both high availability and load balancing by distributing traffic among multiple routers while maintaining redundancy, making it the most suitable option for this requirement.
- D. Incorrect.
Disabling preemption in HSRP can delay failover and does not align with the requirement for minimal downtime or load balancing.