Juniper JUNOSE 11.2.X BGP AND MPLS Configuration Manual page 27

Part 3
Chapter 8
Copyright © 2010, Juniper Networks, Inc.
Figure 78: Inter-AS Topology with End-to-End Stacked MPLS Tunnels . . . . . . . 402
Figure 79: Topology for Three-label Stack Configuration for Inter-AS Option
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406
Figure 80: Topology for Inter-AS Option C with Route Reflectors . . . . . . . . . . . . 408
Figure 81: Inter-AS IPv6 VPN Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
Figure 82: Site Connectivity in a Full-Mesh VPN . . . . . . . . . . . . . . . . . . . . . . . . . . 410
Figure 83: Route Target Configuration for a Full-Mesh VPN . . . . . . . . . . . . . . . . . 410
Figure 84: Site Connectivity in a Hub-and-Spoke VPN . . . . . . . . . . . . . . . . . . . . . 411
Figure 85: Route Target Configuration for a Hub-and-Spoke VPN . . . . . . . . . . . . 411
Figure 86: Site Connectivity in an Overlapping VPN . . . . . . . . . . . . . . . . . . . . . . . 412
Figure 87: Route Target Configuration for an Overlapping VPN . . . . . . . . . . . . . . 412
Figure 88: Overlapping VPNs on a Single PE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
Figure 89: Fully Meshed VPNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426
Figure 90: Hub-and-Spoke VPN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 428
Figure 91: Import and Export Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429
Figure 92: Configuring Static Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 437
Figure 93: BGP/MPLS VPN IBGP Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 442
Figure 94: BGP/MPLS VPN EIBGP Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443
Figure 95: PE-to-CE Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445
Figure 96: Network with Potential Routing Loops . . . . . . . . . . . . . . . . . . . . . . . . 449
Figure 97: Preventing Potential Routing Loops in the Network . . . . . . . . . . . . . . 450
Figure 98: Allowing Local AS in VPNv4 Address Family . . . . . . . . . . . . . . . . . . . . 451
Figure 99: Topology for Fast Reconvergence by Means of Unique VRF RDs, Before
Tunnels Go Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456
Figure 100: Topology for Fast Reconvergence by Means of Reachability Checking,
After Tunnels Go Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457
Figure 101: Static Default Route for Internet Access . . . . . . . . . . . . . . . . . . . . . . . 463
Figure 102: Fallback Global Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464
Figure 103: Global Import Map Applied to Routes Imported from VRF BGP
RIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465
Figure 104: BGP Session Between CE Router and Parent VR . . . . . . . . . . . . . . . 466
Figure 105: Static Route to Shared IP Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 468
Figure 106: Global Export Map Applied to Routes Exported from VRF BGP
RIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 469
Figure 107: Carrier-of-Carriers Internet Service . . . . . . . . . . . . . . . . . . . . . . . . . . . 471
Figure 108: Carrier-of-Carriers VPN Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473
Figure 109: Carrier-of-Carrier IPv6 VPNs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475
Figure 110: IPv6 Tunneled over MPLS-IPv4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476
Figure 111: IPv6 Tunneled Across IPv4 Domains . . . . . . . . . . . . . . . . . . . . . . . . . . . 477
Figure 112: OSPF Topology with Backdoor Link . . . . . . . . . . . . . . . . . . . . . . . . . . . 482
Figure 113: OSPF Sham Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 483
Layer 2 Services Over MPLS
Layer 2 Services over MPLS Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 509
Figure 114: Layer 2 Services over a Provider's MPLS Network . . . . . . . . . . . . . . . . 510
Figure 115: Common ISP Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 516
Figure 116: E Series Router Replacing Remote ATM Switch . . . . . . . . . . . . . . . . . . 516
Figure 117: AAL5 Pseudowire and MPLS Tunnel . . . . . . . . . . . . . . . . . . . . . . . . . . . 517
List of Figures
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