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.
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)- A88% (52)
- C7% (4)
- D2% (1)
- E3% (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.
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.
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.
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.
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.
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
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