3Com 3C13636 Configuration Manual page 923

3Com Router 3000 Ethernet Family
Configuration Guide
II. Network diagram
Upper VPN Upper VPN Upper VPN Upper VPN
Lower VPN Lower VPN Lower VPN Lower VPN
VPN1 Site1 VPN1 Site1 VPN1 Site1 VPN1 Site1
Figure 3-19 Hierarchical BGP/MPLS VPN
III. Configuration procedure
Note:
This case only illustrates the configurations concerned with PEs in a hierarchical
BGP/MPLS VPN.
1) Configure SPE
# Configure the basic MPLS capabilities.
[SPE] mpls lsr-id 1.0.0.2
[SPE] mpls
[SPE-mpls] mpls ldp
# Configure VPN-INSTANCE
[SPE] ip vpn-instance vpn1
[SPE-vpn-vpn1] route-distinguisher 100:1
[SPE-vpn-vpn1] vpn-target 100:1 both
# Configure interfaces (So far as a PE router concerned, its LOOPBACK 0 interface
must be assigned with a host address of 32-bit mask.
[SPE] interface serial2/0/0
[SPE-Serial2/0/0] ip address 10.0.0.1 255.0.0.0
[SPE-Serial2/0/0] mpls
[SPE-Serial2/0/0] mpls ldp enable
[SPE] interface loopback0
PE PE PE PE
MPLS backbone MPLS backbone
AS100 AS100 AS100 AS100
UPE UPE UPE UPE
VPN2 Site1 VPN2 Site1 VPN2 Site1 VPN2 Site1
CE CE CE CE
CE CE CE CE
3Com Corporation
Chapter 3 BGP/MPLS VPN Configuration
PE PE PE PE
MPLS backbone MPLS backbone
Router Router Router Router
SPE SPE SPE SPE
UPE UPE UPE UPE
VPN1 Site1 VPN1 Site1 VPN1 Site1 VPN1 Site1
CE CE CE CE
3-61
VPN2 Site1 VPN2 Site1 VPN2 Site1 VPN2 Site1
R3689 R3689 R3689 R3689
R2630 R2630 R2630 R2630
CE CE CE CE