Juniper JUNOSE, Руководство по настройке

Страница: 18 / 738

Deleting Routes for a VRF .....................................................................447
Enabling VRF–to–VR Peering ................................................................448
Achieving Fast Reconvergence in VPN Networks ..................................449
Fast Reconvergence with Unique RDs ............................................450
Fast Reconvergence by Means of Reachability Checking ................451
Configuring BGP to Send Labeled and Unlabeled Unicast Routes ..........452
BGP Next-Hop-Self ................................................................................453
BGP Processing of Received Routes ......................................................454
Labeled Unicast Routes ..................................................................454
Unlabeled Unicast Routes ...............................................................454
Resolving IPv6 Indirect Next Hops .................................................454
Labeled VPN Routes .......................................................................454
BGP Advertising Rules for Labeled and Unlabeled Routes with the Same
AFI .................................................................................................455
Providing Internet Access to and from VPNs ...............................................455
Enabling Traffic Flow from the VPN to the Internet ..............................456
Problems ........................................................................................456
Solutions ........................................................................................456
Configuring a Default Route to a Shared Interface ..........................456
Configuring a Fallback Global Option .............................................457
Configuring a Global Import Map for Specific Routes ......................458
Creating a BGP Session Between the CE Router and the Parent VR .......459
Enabling Traffic Flow from the Internet to the VPN ..............................461
Static Routes to a Shared IP Interface .............................................461
Global Export Map ..........................................................................462
Carrier-of-Carriers IPv4 VPNs ......................................................................463
Customer Carrier as an Internet Service Provider .................................464
Configuration Steps ........................................................................465
Customer Carrier as a VPN Service Provider .........................................466
Configuration Steps ........................................................................467
Enabling Carrier-of-Carriers Support on a VRF ......................................468
Carrier-of-Carriers Using BGP as the Label Distribution Protocol ...........469
Carrier-of-Carriers IPv6 VPNs ......................................................................469
Connecting IPv6 Islands Across IPv4 Clouds with BGP ................................470
Connecting IPv6 Islands Across Multiple IPv4 Domains ........................471
Configuring IPv6 Tunneling over IPv4 MPLS .........................................472
OSPF and BGP/MPLS VPNs ..........................................................................473
Distributing OSPF Routes from CE Router to PE Router ........................474
Distributing Routes Between PE Routers ...............................................474
Preserving OSPF Routing Information Across the MPLS/VPN
Backbone .......................................................................................474
OSPF Domain Identifier Attribute ...................................................474
OSPF Route Type Attribute .............................................................475
Distributing OSPF Routes from PE Router to CE Router ........................475
Preventing Routing Loops .....................................................................476
Using Remote Neighbors to Configure OSPF Sham Links ......................476
OSPF Backdoor Links .....................................................................477
OSPF Sham Links ...........................................................................477
Configuration Tasks ..............................................................................479
Configuring VPLS ........................................................................................481
Configuring L2VPNs ....................................................................................481
xviii ■
Table of Contents
JUNOSe 11.0.x BGP and MPLS Configuration Guide