Configuring Layer 3 VPNs

This chapter describes how to configure Layer 3 VPNs, discussing the following topics:

• Introduction to Configuring Layer 3 VPNs
• Configuring Routing Between PE and CE Routers in Layer 3 VPNs
• Limiting the Number of Paths and Prefixes Accepted from CE Routers in Layer 3 VPNs
• Configuring Layer 3 VPNs to Carry IPv6 Traffic
• Configuring EBGP Multihop Sessions Between PE and CE Routers in Layer 3 VPNs
• Configuring Layer 3 VPNs to Carry IBGP Traffic
• Filtering Packets in Layer 3 VPNs Based on IP Headers
• Applying Custom MPLS EXP Classifiers to Routing Instances in Layer 3 VPNs
• Load Balancing and IP Header Filtering for Layer 3 VPNs
• Configuring a Label Allocation and Substitution Policy for VPNs
• Configuring a VPN Tunnel for VRF Table Lookup
• Configuring Logical Units on the Loopback Interface for Routing Instances in Layer 3 VPNs
• Configuring Multicast Layer 3 VPNs
• Configuring Packet Forwarding for Layer 3 VPNs
• Configuring GRE Tunnels for Layer 3 VPNs
• Configuring an ES Tunnel Interface for Layer 3 VPNs
• Configuring IPsec Tunnels Instead of MPLS LSPs Between PE Routers in Layer 3 VPNs
• Configuring Protocol-Independent Load Balancing in Layer 3 VPNs
• Configuring the Algorithm That Determines the Active Route to Evaluate AS Numbers in AS Paths for VPN Routes
• Configuring Traffic Policing in Layer 3 VPNs
• Accepting BGP Updates with Unique Inner VPN Labels in Layer 3 VPNs