Example For Configuring Bgp As Number Substitution - 3Com MSR 50 Series Configuration Manual

1552 C 79: MPLS L3VPN C
HAPTER
Example for Configuring
BGP AS Number
Substitution
ONFIGURATION
Network requirements
As shown in Figure 431, CE 1 and CE 2 belong to VPN 1 and are connected to PE
1 and PE 2 respectively. In addition, they use the same AS number 600.
Network diagram
Figure 431 Configure BGP AS number substitution
Loop 0
Eth1/0
PE 1
CE 1
Eth1/0
Eth1 /1
Device Interface
CE 1 Eth 1/0
Eth 1/1
PE 1 Loop0
Eth 1/0
Eth 1/1
CE 2 Eth 1/0
Eth 1/1
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 MPLS basic capability and MPLS LDP on the MPLS backbone to
■
establish LDP LSPs.
Establish MP-IBGP peer relationship between the PEs to advertise VPN IPv4
■
routes.
Configure the VPN instance of VPN 1 on PE 2 to allow CE 2 to access the
■
network.
Configure the VPN instance of VPN 1 on PE 1 to allow CE 1 to access the
■
network.
Configure BGP between PE 1 and CE 1, and between PE 2 and CE 2 to inject
■
routes of CEs into PEs.
After completing the above configurations, if you issue the display ip
routing-table command on CE 2, you should see that CE 2 has learned the route
to network segment 10.1.1.0/24, where the interface used by CE 1 to access PE 1
MPLS backbone
Loop 0
Eth1/1
Eth1 /0 Eth1 /1
P
VPN 1
IP address Device
10.1.1.1/24 P
100.1.1.1/24
1.1.1.9/32
10.1.1.2/24 PE 2
20.1.1.1/24
10.2.1.1/24
200.1.1.1/24
Eth1/1
Loop 0
Eth1 /0
PE 2
CE 2
Eth1 /0
VPN 1
Interface IP address
Loop0 2.2.2.9/32
Eth 1/0 20.1.1.2/24
Eth 1/1 30.1.1.1/24
Loop0 3.3.3.9/32
Eth 1/0 10.2.1.2/24
Eth 1/1 30.1.1.2/24
Eth1/1