What does EVPN carry for a VXLAN overlay?
Why A is the answer
Reachability for MAC and IP addresses
EVPN is the control plane for the overlay.
In detail
- EVPN is the control plane for the overlay.
- VXLAN carries data, and EVPN carries reachability.
Use case
An illustrative scenario, not a real incident.
EVPN carries MAC and IP reachability, so VXLAN tunnels know where to send traffic.
See it in different ways
flowchart TD A["Shared underlay"] --> B["VXLAN overlay"] B --> C["Tenant A VRF"] B --> D["Tenant B VRF"] E["BGP EVPN"] --> B
mindmap
root((Multi-tenancy))
Ethernet
BGP-EVPN
VXLAN overlay
InfiniBand
Partition keys
Membership typemindmap
root(("Overlay network"))
n1["Control plane"]
n2["EVPN"]
n3["Data plane"]
n4["VXLAN"]Key point: EVPN is the overlay control plane.
Why the other options are wrong
- B. GPU firmware for each of the attached hosts
- It carries no firmware.
- C. Power readings from each switch in the rack
- It carries no power data.
- D. The training data that tenants are using
- The data plane carries data.