R3102-R3103-HP 6600/HSR6600 Routers MPLS Configuration Guide

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Figure 98 Network diagram
Device Interface IP address Device Interface IP address
CE 1 Loop0 100.1.1.1/32 CE 3 Loop0 200.1.1.1/32
GE2/1/1 10.1.1.1/24 GE2/1/1 10.3.1.1/24
CE 2 GE2/1/1 10.2.1.1/24 PE 2 Loop0 2.2.2.9/32
PE 1 Loop0 1.1.1.9/32 GE2/1/1 10.2.1.2/24
GE2/1/1 10.1.1.2/24 GE2/1/2 40.1.1.1/24
GE2/1/2 20.1.1.1/24 GE2/1/3 20.1.1.2/24
GE2/1/3 30.1.1.1/24 P Loop0 3.3.3.9/32
PE 3 Loop0 4.4.4.9/32 GE2/1/1 30.1.1.2/24
GE2/1/1 10.3.1.2/24 GE2/1/2 40.1.1.2/24
GE2/1/2 50.1.1.2/24 GE2/1/3 50.1.1.1/24
Configuration procedure
1. Configure basic MPLS L3VPN:
{ Configure OSPF on the MPLS backbone to allow the PEs and P device to learn the routes of the
loopback interfaces from each other.
{ Configure basic MPLS and MPLS LDP on the MPLS backbone to establish LDP LSPs.
{ Establish MP-IBGP peer relationships between the PEs to advertise VPN IPv4 routes.
{ Configure VPN 1 on PE 1 to allow CE 1 to access the network.
{ Configure VPN 1 on PE 2 to allow CE 2 to access the network.
{ Configure VPN 1 on PE 3 to allow CE 3 to access the network.
{ Configure BGP between PE 1 and CE 1, between PE 2 and CE 2, and between PE 3 and CE 3
to inject routes of CEs into PEs.
2. Configure BGP AS number substitution:
# Configure BGP AS number substitution on PE 1, PE2, and PE3 as described in "Configuring BGP
AS number substitution."
# Display rout
ing information on CE 2. You can see that CE 2 has learned the route 100.1.1.1/32
to CE 1. A routing loop has occurred because CE1 and CE 2 reside in the same site.
Loop0
Loop0
Loop0
PE 1
P
PE 3
CE 2
CE 3
VPN 1
AS 600
VPN 1
AS 600
GE2/1/2
GE2/1/2
GE2/1/3
GE2/1/1
GE2/1/1
GE2/1/1
GE2/1/1
GE2/1/1
MPLS backbone
AS 100
CE 1
GE2/1/1
GE2/1/1
Loop0
GE2/1/2
GE2/1/3
GE2/1/3
GE2/1/2
PE 2
Loop0
Loop0