Juniper JUNOSE 11.2.X BGP AND MPLS User Manual

Advertising Static Routes to Customers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446
Advertising IGP Routes to Customers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446
Disabling the Default Address Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446
Using a Single AS Number for All CE Sites . . . . . . . . . . . . . . . . . . . . . . . . . . . 447
Preventing Routing Loops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 448
Advertising Prefixes with Duplicate AS Numbers . . . . . . . . . . . . . . . . . . . . . . 451
Controlling Route Importation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 452
Deleting Routes for a VRF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 453
Enabling VRF–to–VR Peering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454
Achieving Fast Reconvergence in VPN Networks . . . . . . . . . . . . . . . . . . . . . 455
Fast Reconvergence with Unique RDs . . . . . . . . . . . . . . . . . . . . . . . . . . 456
Fast Reconvergence by Means of Reachability Checking . . . . . . . . . . . . 457
Configuring BGP to Send Labeled and Unlabeled Unicast Routes . . . . . . . 458
BGP Next-Hop-Self . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459
BGP Processing of Received Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459
Labeled Unicast Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460
Unlabeled Unicast Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460
Resolving IPv6 Indirect Next Hops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460
Labeled VPN Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460
BGP Advertising Rules for Labeled and Unlabeled Routes with the Same
AFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460
Providing Internet Access to and from VPNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 461
Enabling Traffic Flow from the VPN to the Internet . . . . . . . . . . . . . . . . . . . . 461
Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 461
Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 462
Configuring a Default Route to a Shared Interface . . . . . . . . . . . . . . . . 462
Configuring a Fallback Global Option . . . . . . . . . . . . . . . . . . . . . . . . . . . 463
Configuring a Global Import Map for Specific Routes . . . . . . . . . . . . . . 464
Creating a BGP Session Between the CE Router and the Parent VR . . . . . . 465
Enabling Traffic Flow from the Internet to the VPN . . . . . . . . . . . . . . . . . . . 467
Static Routes to a Shared IP Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 467
Global Export Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468
Carrier-of-Carriers IPv4 VPNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 469
Customer Carrier as an Internet Service Provider . . . . . . . . . . . . . . . . . . . . . 470
Configuration Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471
Customer Carrier as a VPN Service Provider . . . . . . . . . . . . . . . . . . . . . . . . . 472
Configuration Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473
Enabling Carrier-of-Carriers Support on a VRF . . . . . . . . . . . . . . . . . . . . . . . 474
Carrier-of-Carriers Using BGP as the Label Distribution Protocol . . . . . . . . 475
Carrier-of-Carriers IPv6 VPNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475
Connecting IPv6 Islands Across IPv4 Clouds with BGP . . . . . . . . . . . . . . . . . . . . 476
Connecting IPv6 Islands Across Multiple IPv4 Domains . . . . . . . . . . . . . . . . 477
Configuring IPv6 Tunneling over IPv4 MPLS . . . . . . . . . . . . . . . . . . . . . . . . . 478
OSPF and BGP/MPLS VPNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479
Distributing OSPF Routes from CE Router to PE Router . . . . . . . . . . . . . . . . 479
Distributing Routes Between PE Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . 480
Preserving OSPF Routing Information Across the MPLS/VPN Backbone . . 480
OSPF Domain Identifier Attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 480
OSPF Route Type Attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 480
xixCopyright © 2010, Juniper Networks, Inc.
Table of Contents

Juniper JUNOSE 11.2.X BGP AND MPLS Specifications

General

Brand	Juniper
Model	JUNOSE 11.2.X BGP AND MPLS
Category	Software
Language	English