QuestionQ26

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You are taking part in a multi-team design workshop for a large enterprise campus and data-center refresh project. The network engineering team has chosen an EVPN-VXLAN-based fabric to provide scalable Layer 2/3 services, enhance segmentation, and simplify future automation.

As part of the session, you have been asked to contribute to the technical design recommendations document, which will form the basis for the project implementation plan. This includes recording best practices, control-plane design, and overlay requirements for the EVPN-VXLAN fabric.

You need to identify the accurate core recommendations, required features, and key design functions to include in the proposal.

What accurately describes core recommendations, requirements, features, or functions of EVPN-VXLAN fabrics?

Choose two
  • A OSPF is commonly used to establish Layer 3 underlay connectivity between VTEP loopback interfaces.
  • B EVPN-VXLAN overlays require all stub VTEPs to form full-mesh iBGP peerings with each other.
  • C Route Distinguishers are used by VTEPs to control which peers receive EVPN route advertisements.
  • D BGP Route Reflectors (RRs) configured on eBGP routers enable routing between external and overlay networks.
  • E MP-BGP EVPN serves as the control plane for VXLAN overlays and can be orchestrated by NetConductor.
Explanation

An EVPN-VXLAN fabric needs a routed underlay that advertises and reaches VTEP loopback addresses; OSPF is commonly used for this Layer 3 underlay function. MP-BGP with the EVPN address family distributes endpoint and overlay reachability information, and Aruba NetConductor can orchestrate an EVPN-VXLAN overlay. Route reflectors eliminate the need for full-mesh iBGP among VTEPs, while route targets—not route distinguishers—govern EVPN route import and export.

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