VRF use cases
Virtual Routing and Forwarding (VRFs) allow you to create multiple routing instances within a single router. The implementation of VRFs is helpful in a multi-tenant situation, where you may be serving numerous customers using the same physical network infrastructure. Specifically, VRFs are used to keep customer traffic and routing separate, but using the same physical hardware.
VRFs are often implemented in the following situations:
- Datacenters in a colocation arrangement where multiple "tenants" have a presence and require a logically separate routing fabric
- MPLS Layer 3 VPN uses VRFs extensively to achieve its operation.
- Corporate buildings with many tenants can employ VRFs in their hardware to accommodate multiple corporate entities, each with their own virtually separate and independent routing domain.
Links to this page:
- Bidirectional Forwarding Detection (BFD)
- MPLS - BGP customer prefixes do not appear in the LFIB
- MPLS - Connecting IPv6 sites over an IPv4 backbone
- MPLS - L3VPN BGP EIGRP redistribution
- MPLS - L3VPN BGP OSPF Redistribution
- MPLS - Virtual Private Network (VPN)
- MPLS L3VPN Inter-AS Options
- Security - accessing VTY from another VRF
- VRF lite route leaking
- VRF sharing across multiple routers