300-420 Question 97
Single answerAn enterprise network is deploying a Layer 2 topology with multiple redundant links to ensure high availability. The network architect has chosen to implement a loop-free technology to prevent Layer 2 loops while maximizing link utilization. Which of the following technologies would best suit this requirement?
- A
Spanning Tree Protocol (STP)
- B
Flex Links
- C
EtherChannel with LACP
- D
FabricPath
Show answer and explanation
Correct answer: D
Explanation
FabricPath is a Cisco innovation that provides a loop-free Layer 2 topology using routing principles and encapsulation techniques. Unlike traditional Spanning Tree Protocol, which blocks redundant paths to prevent loops, FabricPath enables all links to be active and fully utilized. This maximizes network efficiency and ensures high availability in environments requiring redundancy. Therefore, FabricPath is the best solution for the given scenario.
- A. Incorrect.
Spanning Tree Protocol (STP) prevents loops by blocking redundant links, but it does not maximize link utilization as some links remain in a blocking state.
- B. Incorrect.
Flex Links offer a basic loop-free mechanism by providing active/standby redundancy, but they do not allow simultaneous utilization of redundant links, limiting efficiency.
- C. Incorrect.
EtherChannel with LACP aggregates multiple physical links into a single logical link, which increases bandwidth, but it does not inherently prevent Layer 2 loops in a larger topology.
- D. Correct.
FabricPath uses a loop-free topology based on Layer 2 routing and encapsulation, allowing all links to be active and utilized while ensuring a loop-free environment, making it the most suitable solution for this scenario.