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350-401 · Question #879

Which of the following are benefits from implementing the use of VXLAN's in a network? (Choose two)

The correct answer is A. Increased scalability since VXLAN extends the IF field to 24 bits, providing up to 16 million unique D. Supports Equal Cost Multi-pathing (ECMP) so that load balancing over multiple links can be used.. VXLANs provide increased network scalability by expanding the number of available network segments and support efficient load balancing through Equal Cost Multi-pathing (ECMP).

Submitted by sofia.br· Mar 6, 2026Virtualization

Question

Which of the following are benefits from implementing the use of VXLAN's in a network? (Choose two)

Options

  • AIncreased scalability since VXLAN extends the IF field to 24 bits, providing up to 16 million unique
  • BMakes the implementation of Spanning Tree more efficient.
  • CCan be used to replace layer 3 routing protocols and increase routing efficiency at layer 2.
  • DSupports Equal Cost Multi-pathing (ECMP) so that load balancing over multiple links can be used.

How the community answered

(46 responses)
  • A
    87% (40)
  • B
    9% (4)
  • C
    4% (2)

Why each option

VXLANs provide increased network scalability by expanding the number of available network segments and support efficient load balancing through Equal Cost Multi-pathing (ECMP).

AIncreased scalability since VXLAN extends the IF field to 24 bits, providing up to 16 million uniqueCorrect

VXLAN extends the VLAN ID field to 24 bits, providing a VXLAN Network Identifier (VNI) that allows for up to 16 million unique logical network segments, significantly increasing scalability beyond traditional VLAN limitations.

BMakes the implementation of Spanning Tree more efficient.

VXLAN itself does not make Spanning Tree (STP) more efficient; instead, it allows for the elimination of STP in the overlay by extending Layer 2 over a Layer 3 underlay that typically uses routing protocols.

CCan be used to replace layer 3 routing protocols and increase routing efficiency at layer 2.

VXLAN is a Layer 2 overlay technology that encapsulates Ethernet frames; it relies on and utilizes Layer 3 routing protocols in the underlay, rather than replacing them or increasing Layer 2 routing efficiency.

DSupports Equal Cost Multi-pathing (ECMP) so that load balancing over multiple links can be used.Correct

VXLAN encapsulates Layer 2 frames within UDP, enabling their transport over a Layer 3 underlay network, which inherently supports Equal Cost Multi-pathing (ECMP) for efficient load balancing across multiple active paths.

Concept tested: VXLAN benefits and features

Source: https://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-series-switches/white-paper-c11-730070.html

Topics

#VXLAN#overlay network#ECMP#VNI scalability

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