3Com 8800 Configuration Manual page 513

3Com Switch 8800 Configuration Guide
networks at the city level into a single MPLS VPN will impose a high requirement in
performance on the equipment on the entire network, in the event that the network
topology size is large. However, the requirement in equipment performance can
become lower if this MPLS VPN is separated into two VPNs, the network at the
province level and the network at the city level, for example.
SPE acts as a PE on the network at the province level, and is connected with a
downstream MPLS VPN at the city level. UPE acts as a PE on the network at the city
level and provide access service for the VPN clients which are normally low-end
routers.
II. Network diagram
Upper VPN Upper VPN
Lower VPN Lower VPN
VPN1 Sit e1 VPN1 Sit e1 VPN1 Sit e1 VPN1 Sit e1
Figure 37-15 Network diagram for 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 capability.
[SPE] mpls lsr-id 1.0.0.2
[SPE] mpls
[SPE-mpls] quit
PE PE PE PE
VLAN201 VLAN201 VLAN201 VLAN201
10.0.0.1/ 8 10.0.0.1/ 8 10.0.0.1/ 8 10.0.0.1/ 8
VLAN301 VLAN301 VLAN301 VLAN301
10. 0.0.2/8 10. 0.0.2/8 10. 0.0.2/8 10. 0.0.2/8
Loopbac k0:1.0.0.1 Loopbac k0:1.0.0.1
UPE UPE UPE UPE
VPN2 Sit e1 VPN2 Sit e1 VPN2 Sit e1 VPN2 Sit e1
CE CE CE CE
CE CE CE CE
Chapter 37 BGP/MPLS VPN Configuration
MPLS backbone MPLS backbone
PE PE PE PE
MPLS 骨干网 MPLS 骨干网
Loopbac k0:10.0.0. 2 Loopbac k0:10.0.0. 2 Loopbac k0:10.0.0. 2 Loopbac k0:10.0.0. 2
SPE SPE SPE SPE
UPE UPE UPE UPE
VPN1 Sit e1 VPN1 Sit e1 VPN1 Sit e1 VPN1 Sit e1
CE CE CE CE
37-69
VPN2 Sit e1 VPN2 Sit e1 VPN2 Sit e1 VPN2 Sit e1
CE CE CE CE