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200-150 · Question #179

Which two descriptions of a Fabricpath network are true? (Choose two.)

The correct answer is A. A leaf node connects to servers. B. Leaf nodes can be Layer 3 devices.. In a Cisco FabricPath topology, leaf nodes serve as the access-layer edge that connects to servers and may also perform Layer 3 routing functions.

Cisco Data Center Networking Technologies

Question

Which two descriptions of a Fabricpath network are true? (Choose two.)

Options

  • AA leaf node connects to servers.
  • BLeaf nodes can be Layer 3 devices.
  • CA spine node connects to other switch in the fabric.
  • DThere is a spanning tree protocol running between leaf and spine switches
  • EA spine node connects to servers.

How the community answered

(59 responses)
  • A
    88% (52)
  • C
    7% (4)
  • D
    2% (1)
  • E
    3% (2)

Why each option

In a Cisco FabricPath topology, leaf nodes serve as the access-layer edge that connects to servers and may also perform Layer 3 routing functions.

AA leaf node connects to servers.Correct

Leaf nodes occupy the edge tier of the FabricPath two-tier architecture and are responsible for directly connecting to servers, hosts, and other end devices - this is the defining characteristic that distinguishes leaf from spine in the topology.

BLeaf nodes can be Layer 3 devices.Correct

Leaf nodes can operate as Layer 3 devices, providing IP routing and default gateway functionality at the network edge, which is a standard capability in modern data center designs that combine FabricPath with Layer 3 services.

CA spine node connects to other switch in the fabric.

Spine nodes connect specifically to leaf switches to provide inter-leaf aggregation - they do not form connections to arbitrary other switches, and implying unstructured connectivity misrepresents the strict spine-to-leaf relationship.

DThere is a spanning tree protocol running between leaf and spine switches

FabricPath is explicitly designed to eliminate Spanning Tree Protocol by using IS-IS as its control plane for loop-free Layer 2 multi-path forwarding between leaf and spine.

EA spine node connects to servers.

Spine nodes serve as the aggregation backbone interconnecting leaf switches and do not connect directly to servers - server attachment is exclusively the role of leaf nodes.

Concept tested: Cisco FabricPath spine and leaf node roles

Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/fabricpath/configuration/guide/b_NX-OS_FabricPath_Configuration_Guide.html

Topics

#FabricPath#leaf-spine topology#spine node#leaf node

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