264
Request list: 0 Retransmit list: 0
Configuring BGP AS number substitution
Network requirements
As shown in
, CE 1 and CE 2 belong to VPN 1 and are connected to PE 1 and PE 2, respectively.
The two CEs have the same AS number, 600. Configure BGP AS number substitution on the PEs to enable
the CEs to communicate with each other.
Figure 71
Network diagram
Table 21
Interface and IP address assignment
Device Interface IP
address
Device
Interface
IP address
CE 1
Vlan-int11
10.1.1.1/24
P
Loop0
2.2.2.9/32
Vlan-int12
100.1.1.1/24
Vlan-int11
30.1.1.1/24
PE 1
Loop0
1.1.1.9/32
Vlan-int12
20.1.1.2/24
Vlan-int11
10.1.1.2/24
PE
2
Loop0
3.3.3.9/32
Vlan-int12
20.1.1.1/24
Vlan-int11
30.1.1.2/24
CE 2
Vlan-int12
10.2.1.1/24
Vlan-int12
10.2.1.2/24
Vlan-int13
200.1.1.1/24
Configuration procedure
1.
Configuring 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 relationship between the PEs to advertise VPNv4 routes.
{
Configure the VPN instance of VPN 1 on PE 2 to allow CE 2 to access the network.