MPLS: Layer 3 VPNs Configuration Guide, Cisco IOS Release 15M&T
First Published: 2012-11-21
Last Modified: 2013-03-15
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C O N T E N T S
MPLS Virtual Private Networks 1C H A P T E R 1
Finding Feature Information 1
Prerequisites for MPLS Virtual Private Networks 1
Restrictions for MPLS Virtual Private Networks 2
Information About MPLS Virtual Private Networks 4
MPLS Virtual Private Network Definition 4
How an MPLS Virtual Private Network Works 5
How Virtual Routing and Forwarding Tables Work in an MPLS Virtual Private Network 5
How VPN Routing Information Is Distributed in an MPLS Virtual Private Network 6
MPLS Forwarding 6
Major Components of an MPLS Virtual Private Network 6
Benefits of an MPLS Virtual Private Network 7
How to Configure MPLS Virtual Private Networks 9
Configuring the Core Network 9
Assessing the Needs of MPLS Virtual Private Network Customers 9
Configuring MPLS in the Core 10
Connecting the MPLS Virtual Private Network Customers 10
Defining VRFs on the PE Devices to Enable Customer Connectivity 10
Configuring VRF Interfaces on PE Devices for Each VPN Customer 11
Configuring Routing Protocols Between the PE and CE Devices 12
Verifying the Virtual Private Network Configuration 16
Verifying Connectivity Between MPLS Virtual Private Network Sites 16
Verifying IP Connectivity from CE Device to CE Device Across the MPLS Core 16
Verifying That the Local and Remote CE Devices Are in the PE Routing Table 17
Configuration Examples for MPLS Virtual Private Networks 18
Example: Configuring an MPLS Virtual Private Network Using RIP 18
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Example: Configuring an MPLS Virtual Private Network Using Static Routes 20
Additional References 21
Feature Information for MPLS Virtual Private Networks 21
Multiprotocol BGP MPLS VPN 23C H A P T E R 2
Finding Feature Information 23
Prerequisites for Multiprotocol BGP MPLS VPN 23
Information About Multiprotocol BGP MPLS VPN 24
MPLS Virtual Private Network Definition 24
How an MPLS Virtual Private Network Works 25
How Virtual Routing and Forwarding Tables Work in an MPLS Virtual Private Network 25
How VPN Routing Information Is Distributed in an MPLS Virtual Private Network 26
MPLS Forwarding 26
BGP Distribution of VPN Routing Information 26
Major Components of an MPLS Virtual Private Network 27
How to Configure Multiprotocol BGP MPLS VPN 27
Configuring Multiprotocol BGP Connectivity on the PE Devices and Route Reflectors 27
Troubleshooting Tips 29
Configuring BGP as the Routing Protocol Between the PE and CE Devices 29
Verifying the Virtual Private Network Configuration 31
Verifying Connectivity Between MPLS Virtual Private Network Sites 31
Verifying IP Connectivity from CE Device to CE Device Across the MPLS Core 32
Verifying That the Local and Remote CE Devices Are in the PE Routing Table 32
Configuration Examples for Multiprotocol BGP MPLS VPN 34
Example: Configuring an MPLS Virtual Private Network Using BGP 34
Additional References 35
Feature Information for Multiprotocol BGP MPLS VPN 35
MPLS VPN OSPF PE and CE Support 37C H A P T E R 3
Finding Feature Information 37
Prerequisites for MPLS VPN OSPF PE and CE Support 37
Information About MPLS VPN OSPF PE and CE Support 38
Overview of MPLS VPN OSPF PE and CE Support 38
How to Configure MPLS VPN OSPF PE and CE Support 38
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Contents
Configuring OSPF as the Routing Protocol Between the PE and CE Devices 38
Verifying Connectivity Between MPLS Virtual Private Network Sites 40
Verifying IP Connectivity from CE Device to CE Device Across the MPLS Core 40
Verifying That the Local and Remote CE Devices Are in the PE Routing Table 41
Configuration Examples for MPLS VPN OSPF PE and CE Support 42
Example: Configuring an MPLS VPN Using OSPF 42
Additional References 43
Feature Information for MPLS VPN OSPF PE and CE Support 43
MPLS VPN Support for EIGRP Between PE and CE 45C H A P T E R 4
Finding Feature Information 45
Prerequisites for MPLS VPN Support for EIGRP Between PE and CE 45
Information About MPLS VPN Support for EIGRP Between PE and CE 46
Overview of MPLS VPN Support for EIGRP Between PE and CE 46
How to Configure MPLS VPN Support for EIGRP Between PE and CE 46
Configuring EIGRP as the Routing Protocol Between the PE and CE Devices 46
Configuring EIGRP Redistribution in the MPLS VPN 48
Verifying Connectivity Between MPLS Virtual Private Network Sites 50
Verifying IP Connectivity from CE Device to CE Device Across the MPLS Core 50
Verifying That the Local and Remote CE Devices Are in the PE Routing Table 51
Configuration Examples for MPLS VPN Support for EIGRP Between PE and CE 52
Example: Configuring an MPLS VPN Using EIGRP 52
Additional References 54
Feature Information for MPLS VPN Support for EIGRP Between PE and CE 54
IPv6 VPN over MPLS 57C H A P T E R 5
Finding Feature Information 57
Prerequisites for IPv6 VPN over MPLS 57
Restrictions for IPv6 VPN over MPLS 58
Information About IPv6 VPN over MPLS 58
IPv6 VPN over MPLS Overview 58
Addressing Considerations for IPv6 VPN over MPLS 58
Basic IPv6 VPN over MPLS Functionality 59
IPv6 VPN Architecture Overview 59
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Contents
IPv6 VPN Next Hop 60
MPLS Forwarding 60
VRF Concepts 60
IPv6 VPN Scalability 61
Advanced IPv6 MPLS VPN Functionality 62
Internet Access 62
Multiautonomous-System Backbones 63
Carrier Supporting Carriers 64
How to Configure IPv6 VPN over MPLS 64
Configuring a Virtual Routing and Forwarding Instance for IPv6 64
Binding a VRF to an Interface 66
Configuring a Static Route for PE-to-CE Routing 67
Configuring eBGP PE-to-CE Routing Sessions 68
Configuring the IPv6 VPN Address Family for iBGP 69
Configuring Route Reflectors for Improved Scalability 70
Configuring Internet Access 77
Configuring the Internet Gatewa
