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JN0-683 · Question #8

A local VTEP has two ECMP paths to a remote VTEP. Which two statements are correct when load balancing is enabled in this scenario? (Choose two.)

The correct answer is C. The source port in the UDP header is used to load balance VXLAN traffic. D. The inner packet fields are used in the hash for load balancing. The source port in the UDP header is used to load balance VXLAN traffic: In an ECMP (Equal-Cost Multi-Path) scenario with VXLAN, the source port in the UDP header is one of the fields used to hash the traffic and determine which path to use. This helps distribute traffic across…

Data center routing and switching technologies

Question

A local VTEP has two ECMP paths to a remote VTEP. Which two statements are correct when load balancing is enabled in this scenario? (Choose two.)

Options

  • AThe inner packet fields are not used in the hash for load balancing.
  • BThe destination port in the UDP header is used to load balance VXLAN traffic.
  • CThe source port in the UDP header is used to load balance VXLAN traffic.
  • DThe inner packet fields are used in the hash for load balancing.

How the community answered

(49 responses)
  • A
    6% (3)
  • B
    18% (9)
  • C
    76% (37)

Explanation

The source port in the UDP header is used to load balance VXLAN traffic: In an ECMP (Equal-Cost Multi-Path) scenario with VXLAN, the source port in the UDP header is one of the fields used to hash the traffic and determine which path to use. This helps distribute traffic across multiple equal-cost paths between VTEPs. The inner packet fields are used in the hash for load balancing: For VXLAN traffic, the inner packet fields (such as the inner source and destination IP addresses, and sometimes the inner VLAN) are included in the hash calculation to determine the forwarding path. This allows for more effective load balancing across the available paths.

Topics

#VXLAN#ECMP load balancing#UDP source port hash#inner packet fields

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