3com 3031 Instruccion De Instalación
Typical BGP/MPLS VPN Configuration Example
735
[P1-bgp-af-vpn]peer 98 enable
[P1-bgp-af-vpn] peer 98.98.98.2 group 98
[P1-bgp-af-vpn]undo policy vpn-target
Hierarchical BGP/MPLS
VPN Networking Case
Networking requirement
For those VPNs that have distinct hierarchy, an MPLS VPN covering a province and
its cities, for example, incorporating the backbone network at the province level
and the 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.
its cities, for example, incorporating the backbone network at the province level
and the 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.
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.
Networking diagram
Figure 179 Networking of a hierarchical BGP/MPLS VPN
Configuration procedure
This case only illustrates the configurations concerned with PEs in a hierarchical
BGP/MPLS VPN.
BGP/MPLS VPN.
1 Configure SPE
a Configure the basic MPLS capabilities.
[SPE]mpls lsr-id 1.0.0.2
[SPE]mpls
[SPE-mpls]mpls ldp
[SPE-mpls-ldp]quit
b Configure VPN-INSTANCE
[SPE]ip vpn-instance vpn1
[SPE-vpn-vpn1]route-distinguisher 100:1
MPLS backbone
PE
PE
SPE
Router
Upper VPN
Low er VPN
AS100
UPE
CE
CE
CE
CE
VPN1 Site1
VPN2 Site1
VPN1 Site1
VPN2 Site1
UPE
R3689
R2630
MPLS backbone
PE
PE
SPE
Router
Upper VPN
Low er VPN
AS100
UPE
CE
CE
CE
CE
VPN1 Site1
VPN2 Site1
VPN1 Site1
VPN2 Site1
UPE
R3689
R2630