Question

A service provider offers an MPLS L3VPN hub-and-spoke topology for a customer. All spoke sites must send traffic to the hub site but must not communicate directly with each other. The hub PE has two VRFs: VRF-HUB-IN (receives spoke routes) and VRF-HUB-OUT (advertises hub routes). Each spoke VRF must import hub routes and export its own routes to the hub only. Which route-target configuration correctly enforces this hub-and-spoke behavior?

Accepted Answer

Spoke VRFs export RT 100:1 and import RT 100:2; VRF-HUB-IN imports RT 100:1; VRF-HUB-OUT exports RT 100:2.

Answer

Spoke VRFs export RT 100:1 and import RT 100:1; the hub VRF imports and exports RT 100:1.

Answer

Spoke VRFs export RT 100:2 and import RT 100:1; VRF-HUB-IN exports RT 100:1; VRF-HUB-OUT imports RT 100:2.

Answer

All VRFs (spoke and hub) import and export both RT 100:1 and RT 100:2.