258
251B
Configuring MPLS L3VPN carrier's carrier in different ASs
492B
Network requirements
Configure carrier's carrier for the scenario shown in
810H
Figure 72
. In this scenario:
•
PE 1 and PE 2 are the provider carrier's PE switches. They provide VPN services for the
customer carrier.
•
CE 1 and CE 2 are the customer carrier's switches. They are connected to the provider carrier's
backbone as CE switches.
•
PE 3 and PE 4 are the customer carrier's PE switches. They provide MPLS L3VPN services for
the end customers.
•
CE 3 and CE 4 are customers of the customer carrier.
•
The customer carrier and the provider carrier reside in different ASs.
The key to carrier's carrier deployment is to configure exchange of two kinds of routes:
•
Exchange of the customer carrier's internal routes on the provider carrier's backbone.
•
Exchange of the end customers' VPN routes between PE 3 and PE 4, the PEs of the customer
carrier. In this process, an MP-EBGP peer relationship must be established between PE 3 and
PE 4.
Figure 72 Network diagram
Table 18 Interface and IP address assignment
Device
Interface
IP address
Device
Interface
IP address
CE 3
Vlan-int11
100.1.1.1/24
CE 4
Vlan-int11
120.1.1.1/24
PE 3
Loop0
1.1.1.9/32
PE 4
Loop0
6.6.6.9/32
Vlan-int11
100.1.1.2/24
Vlan-int11
120.1.1.2/24
Vlan-int12
10.1.1.1/24
Vlan-int12 20.1.1.2/24
CE 1
Loop0
2.2.2.9/32
CE 2
Loop0
5.5.5.9/32
Vlan-int12
10.1.1.2/24
Vlan-int11 21.1.1.2/24
Vlan-int11
11.1.1.1/24
Vlan-int12 20.1.1.1/24
PE 1
PE 2
Provider carrier
Customer carrier
PE 4
CE 2
CE 1
PE 3
CE 3
CE 4
AS 65410
AS 65420
Loop0
Loop0
Loop0
Customer carrier
Vlan-int11
Loop0
Loop0
AS 100
AS 100
Vlan-int11
Vlan-int12
Vlan-int12
Vlan-int11
Vlan-int11
Vlan-int12
Vlan-int12
Vlan-int11
Vlan-int11
Vlan-int12
Vlan-int12
Vlan-int11
Vlan-int11
MP-EBGP
AS 100
AS 200
AS 300