300-320 · Question #544
Which cisco NX-OS feature can be used to build highly scalable layer 2 multipath networks without utilizing the spanning tree protocol?
The correct answer is B. FabricPath. “Cisco FabricPath brings routing techniques from Layer 3 to solve Layer 2 loop problems” Layer 2 loop problems are what STP was designed to solve and the mentioned routing techniques are done by IS-IS (page 404): “Cisco FabricPath uses extensions to the Intermediate…
Question
Which cisco NX-OS feature can be used to build highly scalable layer 2 multipath networks without utilizing the spanning tree protocol?
Options
- AOTV
- BFabricPath
- CvPC
- DMST
How the community answered
(47 responses)- A6% (3)
- B89% (42)
- C2% (1)
- D2% (1)
Explanation
“Cisco FabricPath brings routing techniques from Layer 3 to solve Layer 2 loop problems” Layer 2 loop problems are what STP was designed to solve and the mentioned routing techniques are done by IS-IS (page 404): “Cisco FabricPath uses extensions to the Intermediate System-to-Intermediate System (IS-IS) protocol to exchange unicast and multicast location and reachability information and to forward traffic in the network using Cisco FabricPath headers. (IS-IS forms the underlay network for the FabricPath and enables the underlay fabric to be a nonblocking Layer 3-routed network with ECMP forwarding).”
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