Configuring Layer 3 Vpns; Layer 3 Vpn Introduction - Juniper ACX1000 Configuration Manual

CHAPTER 26

Configuring Layer 3 VPNs

Layer 3 VPN Introduction

Copyright © 2017, Juniper Networks, Inc.
Layer 3 VPN Introduction on page 813
Understanding Layer 3 VPN Attributes on page 814
Understanding VPN-IPv4 Addresses and Route Distinguishers on page 815
Understanding Virtual Routing and Forwarding Tables on page 818
Understanding IPv4 Route Distribution in a Layer 3 VPN on page 822
Understanding Layer 3 VPN Forwarding Through the Core on page 826
Understanding Routing Instances for Layer 3 VPNs on page 827
Configuring a VPN Tunnel for VRF Table Lookup on page 828
Introduction to Configuring Layer 3 VPNs on page 828
Configuring Routing Between PE and CE Routers in Layer 3 VPNs on page 830
Limiting the Number of Paths and Prefixes Accepted from CE Routers in Layer 3
VPNs on page 841
Understanding IPv6 Layer 3 VPNs on page 842
Layer 3 VPNs for IPv4 and IPv6 Overview on page 842
Configuring Layer 3 VPNs to Carry IPv6 Traffic on page 844
Configuring EBGP Multihop Sessions Between PE and CE Routers in Layer 3
VPNs on page 848
Configuring Layer 3 VPNs to Carry IBGP Traffic on page 849
Configuring a Label Allocation and Substitution Policy for VPNs on page 850
Configuring Protocol-Independent Load Balancing in Layer 3 VPNs on page 852
Configuring the Algorithm That Determines the Active Route to Evaluate AS Numbers
in AS Paths for VPN Routes on page 855
Accepting Route Updates with Unique Inner VPN Labels in Layer 3 VPNs on page 855
In Junos OS, Layer 3 VPNs are based on RFC 4364. RFC 4364 defines a mechanism by
which service providers can use their IP backbones to provide VPN services to their
customers. A Layer 3 VPN is a set of sites that share common routing information and
whose connectivity is controlled by a collection of policies. The sites that make up a
Layer 3 VPN are connected over a provider's existing public Internet backbone.
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