300-320 · Question #153
What are two benefits of migrating from a vPC design to FabricPath? (Choose two.)
The correct answer is A. infrastructure scalability D. network stability. FabricPath improves on vPC by using IS-IS-based Layer 2 routing with ECMP to support massively larger topologies and eliminate STP instability, delivering greater scalability and network stability.
Question
What are two benefits of migrating from a vPC design to FabricPath? (Choose two.)
Options
- Ainfrastructure scalability
- Blower latency
- Cease of configuration
- Dnetwork stability
- Eeasy to manage
How the community answered
(60 responses)- A85% (51)
- B10% (6)
- C2% (1)
- E3% (2)
Why each option
FabricPath improves on vPC by using IS-IS-based Layer 2 routing with ECMP to support massively larger topologies and eliminate STP instability, delivering greater scalability and network stability.
FabricPath uses a routed Layer 2 architecture with IS-IS for topology distribution and ECMP for load balancing, allowing networks to scale to hundreds of switches across a flat Layer 2 domain - far beyond the two-switch vPC peer limitation.
FabricPath does not inherently provide lower latency than a well-designed vPC topology; both operate at similar switching speeds and latency is not a primary differentiator.
FabricPath introduces additional complexity including IS-IS configuration, FabricPath-capable hardware requirements, and new design considerations, making it more complex to configure than vPC.
FabricPath eliminates Spanning Tree Protocol entirely and replaces it with IS-IS-based topology calculation and loop-free ECMP forwarding, removing the instability risks associated with STP topology changes, TCNs, and vPC peer-link failures.
FabricPath is generally considered more operationally complex than vPC due to its IS-IS control plane and specialized hardware requirements, so ease of management is not a benefit.
Concept tested: FabricPath scalability and stability advantages over vPC
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/fabricpath/521_n1_1/b_5k_FabricPath_Config_Guide_521N11.html
Topics
Community Discussion
No community discussion yet for this question.