Configuring BGP-MPLS Applications

This chapter contains the following sections:

• MBGP Overview
• Understanding MBGP Address Families
• Equal-Cost Multipath Support Overview
• Example: Simple ECMP Scenario for BGP/MPLS VPN
• BGP/MPLS VPN Components Overview
• Understanding VPN-IPv4 Addresses
• Understanding Route Targets
• Example: Distribution of Routes and Labels with BGP
• BGP/MPLS VPN Platform Considerations
• MBGP References
• Packet Transport Across an IP Backbone with MPLS Overview
• Example: Transporting Packets Across an IP Backbone with MPLS
• Example: Data Transport Process
• IPv6 VPN Overview
• Intra-AS IPv6 VPNs
• IPv4 VPN Services Across Multiple Autonomous Systems
• Understanding IPv6 VPN Services Across Multiple Autonomous Systems
• VPN Topologies
• Route-Target Filtering for MBGP VPNs
• Configuring Route-Target Filtering
• Configuring BGP VPN Services
• Creating a VRF and Assigning a Route Distinguisher
• Definition of Route Targets for VRFs Overview
• Defining Route Targets for VRFs
• Example: Full-Mesh VPNs
• Example: Hub-and-Spoke VPNs
• Understanding Route Distribution for a VRF using Maps
• Characteristics of Import and Global Import Maps
• Characteristics of Export and Global Export Maps
• Assigning a Route Map to the VRF
• Types of Maps Overview
• Exporting IPv6 VPN Routes Globally into the Global BGP IPv6 RIB
• Assigning an Interface to a VRF
• Configuring Secondary Routing Table Lookup
• Example: Adding Static Routes to a VRF
• Configuring the IGP in the VRF Context
• Configuring the IGP Outside the VRF Context
• Disablement of Automatic Route-Target Filtering
• Understanding Labels Creation per FEC
• Creating Labels per FEC
• Example: Enabling BGP ECMP for BGP/MPLS VPN IBGP
• Example: Enabling BGP ECMP for BGP/MPLS VPN EBGP
• VPN Address Exchange Overview
• Example: Configuring PE-to-CE BGP Sessions
• Route Advertisements to Customers Overview
• Example: Disabling the Default Address Family
• Example: Using a Single AS Number for All CE Sites
• Example: Preventing Routing Loops
• Prefixes Advertisement with Duplicate AS Numbers Overview
• Route Importation Control Overview
• VRF–to–VR Peering Overview
• Enabling VRF-to-VR Peering
• Fast Reconvergence in VPN Networks
• Understanding BGP Routing Rules
• Understanding VPN Communication
• IPv4 VPNs
• IPv6 VPNs
• OSPF and BGP/MPLS VPNs
• Configuring PE Router for OSPF