C and CE routers: You can use any router that can exchange routing information with its PE router.
Network Diagram
Configuration Procedures
Enabling ip cef
Make sure that ip cef is enabled. For improved performance, use ip cef distributed (where available). Complete the following steps on the PEs after MPLS has been set up (configuring tag-switching ip on the interfaces).
Create one VRF for each VPN connected using the ip vrf
Specify the correct route distinguisher used for that VPN. This is used to extend the IP address so that you can identify which VPN it belongs to.
rd
Set up the import and export properties for the MP-BGP extended communities. These are used for filtering the import and export process.
route-target [export|import|both]
Configure the forwarding details for the respective interfaces using the following command.
ip vrf forwarding
Remember to set up the IP address after doing this.
Depending on the PE-CE routing protocol you are using, you can configure static routes or routing protocols (RIP, Open Shortest Path First [OSPF], or BGP) between PE and CE. Detailed configurations are available on the MPLS over ATM Support Page.
Configuring MP-BGP
Configure MP-BGP between the PE routers. There are several ways to configure BGP, such as using the route reflector or confederation methods. The method used here梔irect neighbor configuration梚s the simplest and the least scalable.
Declare the different neighbors.
Enter the address-family ipv4 vrf
Redistribute the static routing, RIP, or OSPF information.
Redistribute connected routing information.
Activate BGP neighboring with the CE routers.
Enter the address-family vpnv4 mode, and complete the following steps:
Activate th
e neighbors.
Specify that extended community must be used. This is mandatory.
Configurations
Configuration commands specific to Customer_A are in red, to Customer_B in blue, and to both in fuchsia.
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Pescara
---------------------------------------------------------------------------------------
Current configuration:
!
version 12.0
!
hostname Pescara
!
ip cef
!
ip vrf Customer_A
rd 100:110
route-target export 100:1000
route-target import 100:1000
!
ip vrf Customer_B
rd 100:120
route-target export 100:2000
route-target import 100:2000
!
clns routing
mpls traffic-eng tunnels
!
interface Loopback0
ip address 10.10.10.4 255.255.255.255
ip router isis
clns router isis
!
interface Loopback101
ip vrf forwarding Customer_A
ip address 200.0.4.1 255.255.255.0
no ip directed-broadcast
!
interface Loopback102
ip vrf forwarding Customer_B
ip address 200.0.4.1 255.255.255.0
no ip directed-broadcast
!
interface Serial0/1
no ip address
no ip directed-broadcast
encapsulation frame-relay
no fair-queue
!
interface Serial0/1.1 point-to-point
description link to Pauillac
bandwidth 512
ip address 10.1.1.14 255.255.255.252
no ip directed-broadcast
ip router isis
tag-switching ip
clns router isis
frame-relay interface-dlci 401
!
router isis
net 49.0001.0000.0000.0004.00
is-type level-1
!
router bgp 100
bgp log-neighbor-changes
neighbor 10.10.10.6 remote-as 100
neighbor 10.10.10.6 update-source Loopback0
!
address-family vpnv4
neighbor 10.10.10.6 activate
neighbor 10.10.10.6 send-community both
exit-address-family
!
address-family ipv4 vrf Customer_B
redistribute connected
no auto-summary
no synchronization
exit-address-family
!
address-family ipv4 vrf Customer_A
redistribute connected
no auto-summary
no synchronization
exit-address-family
!
ip classless
!
end
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Pesaro
---------------------------------------------------------------------------------------
Current configuration:
!
version 12.1
!
hostname Pesaro
!
ip vrf Customer_A
rd 100:110
route-target export 100:1000
route-target import 100:1000
!
ip vrf Customer_B
rd 100:120
route-target export 100:2000
route-target import 100:2000
!
ip cef
clns routing
!
!
interface Loopback0
ip address 10.10.10.6
京公网安备 11010802021500号