Overview
Virtual Routing and Forwarding (VRF) provides the ability to have multiple virtual routers on a single physical device. VRFs operate without knowledge of one another unless they are imported or exported into one another using inter-VRF route leaking. Inter-VRF route leaking allows leaking of route prefixes from one VRF instance to another VRF instance on the same physical router which eliminates the need for external routing.This is useful in cases where multiple VRFs share the same path to reach an external domain, while maintaining their internal routing information limited to their own VRF. This feature enables a data center to consolidate multiple VRF services onto a single server.
There are two types of inter-VRF route leaking:
• Static leaking: leaking manually configured static route entries from a source VRF to a global default VRF table.
• Dynamic leaking: leaking connected routes and dynamically learned routes from protocols such as ISIS, OSPF, and BGP from a source VRF to a destination VRF.
Last modified date: 08/28/2023