Layer 3 VPN Overview

The Junos OS implements Layer 3 BGP/Multiprotocol Label Switching (BGP/MPLS) virtual private networks (VPNs) as defined in RFC 4364, BGP/MPLS IP Virtual Private Networks (VPNs).

This chapter discusses the following topics that provide background information about Layer 3 VPNs:

• Layer 3 VPN Introduction
• Layer 3 VPN Platform Support
• Layer 3 VPN Attributes
• VPN-IPv4 Addresses and Route Distinguishers
• IPv6 Layer 3 VPNs
• VPN Routing and Forwarding Tables
• Route Distribution Within a Layer 3 VPN
• Forwarding Across the Provider’s Core Network
• Routing Instances for VPNs
• Multicast over Layer 3 VPNs
• Layer 3 VPN Standards