CE device—customer edge device. A device that is part of a customer network and that interfaces to a provider edge (PE) device.
Inherit-VRF routing—Packets arriving at a VRF interface are routed by the same outgoing VRF interface.
Inter-VRF routing—Packets arriving at a VRF interface are routed via any other outgoing VRF interface.
IP—Internet Protocol. Network layer protocol in the TCP/IP stack offering a connectionless internetwork service. IP provides features for addressing, type-of-service specification, fragmentation and reassembly, and security. Defined in RFC 791.
PBR—policy-based routing. PBR allows a user to manually configure how received packets should be routed.
PE device—provider edge device. A device that is part of a service provider’s network and that is connected to a CE device. It exchanges routing information with CE devices by using static routing or a routing protocol such as BGP, RIPv1, or RIPv2.
VPN—Virtual Private Network. A collection of sites sharing a common routing table. A VPN provides a secure way for customers to share bandwidth over an ISP backbone network.
VRF—A VPN routing and forwarding instance. A VRF consists of an IP routing table, a derived forwarding table, a set of interfaces that use the forwarding table, and a set of rules and routing protocols that determine what goes into the forwarding table.
VRF-lite—A feature that enables a service provider to support two or more VPNs, where IP addresses can be overlapped among the VPNs.