200-155 · Question #180
When comparing Cisco Nexus 2000 Series Fabric Extenders to tradition top-of rack switches, which two statements are true? (Choose two)
The correct answer is C. Physical interfaces are represented by the parent switch as logical interfaces D. Fabric Extenders operate as a remote line card to the upstream switch.. Cisco Nexus 2000 Series Fabric Extenders (FEX) function as remote line cards for an upstream parent switch, centralizing management by representing FEX physical interfaces as logical interfaces of the parent.
Question
When comparing Cisco Nexus 2000 Series Fabric Extenders to tradition top-of rack switches, which two statements are true? (Choose two)
Options
- AFabric Extenders lower oversubscription in the data center
- BFabric Extenders offload the switching of traffic from the parent
- CPhysical interfaces are represented by the parent switch as logical interfaces
- DFabric Extenders operate as a remote line card to the upstream switch.
How the community answered
(66 responses)- A5% (3)
- B3% (2)
- C92% (61)
Why each option
Cisco Nexus 2000 Series Fabric Extenders (FEX) function as remote line cards for an upstream parent switch, centralizing management by representing FEX physical interfaces as logical interfaces of the parent.
Fabric Extenders themselves do not inherently lower oversubscription; oversubscription is a function of the overall network design, including the uplinks from the FEX to the parent switch.
Fabric Extenders do not offload switching; they forward all traffic to the parent switch, which then performs all switching and routing functions for the FEX-connected devices.
A Fabric Extender behaves as a distributed line card, meaning its physical interfaces are not independently managed but are represented and configured as logical interfaces on the upstream parent Nexus switch.
Fabric Extenders do not perform local switching; instead, they forward all traffic to their parent Nexus switch for switching decisions, effectively operating as a remote line card for the parent.
Concept tested: Cisco Nexus FEX architecture and operation
Source: https://www.cisco.com/c/en/us/products/collateral/switches/nexus-2000-series-fabric-extenders/data_sheet_c78-507093.html
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