Cisco Router IOS XR Manuale Utente Scaricare il pdf (Pagina 81)

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22. MPLS VPN

Next up is MPLS VPN; actually VPNv4 routes are what these actually are since

we are only passing IPv4 traffic in this example.

So we have this diagram below – CE1 and CE2 are the customer routers and both

are running OSPF in Area 0. Then need to talk to each other but do not have

a direct connection available, so they have contracted us to provide

connectivity via MPLS between them. What we will now do is build a pseudo

MPLS network between PE1 and PE2, establish an iBGP peering, create the

associated customer VRF and then peer with the customer via OSPF Area 0.

ISIS Level 2

MPLS

OSPF

Area 0

OSPF

Area 0

Router

Router Router

Router

CE1 CE2

PE1

PE2

So, first up lets configure CE1 using an IP of 10.3.3.3/32 for the loopback

and 10.1.13.3/24 for the link facing PE1.

CE1#conf t

Enter configuration commands, one per line. End with CNTL/Z.

First up, Loopback 0. Since this is IOS, you will need to use the full dotted

decimal subnet mask

CE1(config)#int loop0

CE1(config-if)#ip add 10.3.3.3 255.255.255.255

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 104 105

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Cisco Router IOS XR Manuale Utente Pagina 81