3com 3031 Instruccion De Instalación
718
C
HAPTER
54: BGP/MPLS VPN C
ONFIGURATION
Extranet Networking
Case
Networking Requirements
Both Company A and Company B locate their headquarters in City C. They are
interconnected with VPN and respectively own VPN1 and VPN2.
interconnected with VPN and respectively own VPN1 and VPN2.
MPLS provides VPN function. There are some shared resources at the City C for
two VPNs. All VPN subscribers can access the shared resources, but VPN
subscribers in City A and City B cannot access each other.
two VPNs. All VPN subscribers can access the shared resources, but VPN
subscribers in City A and City B cannot access each other.
The two companies cannot use identical IP addresses, for they share the same
VPN-instance at PE2.
VPN-instance at PE2.
In the case the configuration is focused on controlling access authority of VPN
subscribers at different cities by configuring different VPN-target attributes at
different PEs.
subscribers at different cities by configuring different VPN-target attributes at
different PEs.
Networking Diagram
Figure 174 Extranet networking diagram
Configuration procedure
The following contents are omitted in this case: MPLS basic capacity configuration
between PEs, configuration between PE and P, configuration between CEs. For
these details refer to the former case.
between PEs, configuration between PE and P, configuration between CEs. For
these details refer to the former case.
1 Configure PE-A
a Configure VPN-instance for VPN1 on PE-A, so that it can receive VPN routing
information of VPN-target 111:1.
[PE-A]ip vpn-instance 1
[PE-A-vpn-1]route-distinguisher 100:1
SP netw ork
PC
CE-B
PC
PC
CE-C
PC
PC
CE-A
PC
PC
VPN 1
VPN 2
PE-A
10.1.1.1
PE-B
30.1.1.1
PE-C
20.1.1.1
City A
City C
City B
10.11.1.0/
24
10.12.1.0/
24
Ethernet1/0/0
172.15.0.1/16
Ethernet2/0/0
172.15.1.1/16
Ethernet1/0/0
172.16.0.1/16
Ethernet2/0/0
172.16.1.1/16
E thernet1/0/0
172.17.0.1/16
Ethernet2/0/0
172.17.1.1/16
A S100
A S65011
AS65012
AS65013