Lab: Configuring an MPLS VPN 225
CustomerX2(config)#router rip
CustomerX2(config-router)#version 2
CustomerX2(config-router)#network 10.0.0.0
Now on to the service provider devices. On PE1 and PE2, you need to configure RIPv2 for the VRF and redistribution of BGP routes into RIP. In addition, you need to configure RIP routes to be redistributed into BGP. The following commands accomplish this configuration:
PE1#config t
PE1(config)#router rip
PE1(config)#version 2
PE1(config-router)#address-family ipv4 vrf customer_x
PE1(config-router-af)#redistribute bpg 1 metric transparent
PE1(config-router-af)#exit
PE1(config-router)#exit
PE1(config)#router bgp 1
PE1(config-router)#address-family ipv4 vrf customer_x
PE1(config-router-af)#redistribute rip
The same commands can be used to accomplish the configuration on PE2:
PE2#config t
PE2(config)#router rip
PE2(config)#version 2
PE2(config-router)#address-family ipv4 vrf customer_x
PE2(config-router-af)#redistribute bpg 1 metric transparent
PE2(config-router-af)#exit
PE2(config-router)#exit
PE2(config)#router bgp 1
PE2(config-router)#address-family ipv4 vrf customer_x
PE2(config-router-af)#redistribute rip
Lab: Configuring an MPLS VPN
To really hammer home all of the configuration steps that you’ve been exposed to, I’d like to go through the configuration one more time. This section uses the same simple network you first saw in Chapter 2, “Frame-Mode
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226 Chapter 6 MPLS VPNs and RIP
MPLS.” For this section, you’ll be using the simple service provider network illustrated in Figure 6.16.
F I G U R E 6 . 1 6 A simple service provider network
Serial |
0/0 |
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Serial 0
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0/0 |
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Serial Serial |
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P2 |
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PE2 |
Serial 0/1
Serial 0 
Peer 2
Figure 6.17 illustrates the routing protocol utilization for this network.
F I G U R E |
6 . 1 7 |
Routing protocol utilization |
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CE1 |
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Table 6.6 lists the IP addresses and interfaces for the CE devices in |
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Figure 6.16. |
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T A B L E |
6 . 6 |
Customer Addressing |
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Peer 1 |
192.168.1.1/32 |
192.168.3.5/30 |
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Peer 2 |
192.168.2.1/32 |
192.168.3.10/30 |
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Copyright ©2002 SYBEX, Inc., Alameda, CA |
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Lab: Configuring an MPLS VPN 227
Table 6.7 lists the IP addresses and interfaces of all the service provider devices in Figure 6.16.
T A B L E |
6 . 7 Service Provider Addressing |
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Device |
Loopback 0 |
Serial 0/0 |
Serial 0/1 |
Serial 0/3 |
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Atlanta |
204.134.83.1/32 |
204.134.83.5/30 |
192.168.3.6/30 |
N/A |
Core |
204.134.83.2/32 |
204.134.83.9/30 |
204.134.83.6/30 |
N/A |
Raleigh |
204.134.83.3/32 |
N/A |
192.168.3.9/30 |
204.134.83.10/30 |
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Configuring POP Routers
Presently, the network is set up with an IGP (RIPv2), tag switching, and MP-BGP between the Atlanta and Raleigh POP routers.
The configuration of the Raleigh POP router is as follows:
Raleigh#show running-config
Building configuration...
Current configuration : 1997 bytes
!
version 12.1
service timestamps debug uptime service timestamps log uptime no service password-encryption
!
hostname Raleigh
!
enable password cisco
!
!
!
!
!
memory-size iomem 25
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228 Chapter 6 MPLS VPNs and RIP
ip subnet-zero
ip tcp synwait-time 5 no ip domain-lookup
!
!
ip vrf vpn_1 rd 65000:1
route-target export 65000:1 route-target import 65000:1
ip cef
cns event-service server
!
!
!
!
!
interface Loopback0
ip address 204.134.83.3 255.255.255.255
!
interface Serial0/0 no ip address shutdown
no fair-queue clockrate 64000
!
interface Serial0/1
description *** Link to Peer2 ***
ip address 192.168.3.9 255.255.255.252 clockrate 64000
!
interface Serial0/2 no ip address shutdown
clockrate 64000
!
interface Serial0/3
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Lab: Configuring an MPLS VPN 229
description *** Link to Core Router ***
ip address 204.134.83.10 255.255.255.252 tag-switching ip
clockrate 64000
!
interface Ethernet1/0 no ip address shutdown
!
interface Ethernet1/1 no ip address shutdown
!
interface Ethernet1/2 no ip address shutdown
!
interface Ethernet1/3 no ip address shutdown
!
router rip version 2
network 204.134.83.0
!
router bgp 65000
no synchronization
bgp log-neighbor-changes
neighbor 204.134.83.1 remote-as 65000 neighbor 204.134.83.1 update-source Loopback0 neighbor 204.134.83.1 next-hop-self
no auto-summary
!
!
address-family vpnv4
neighbor 204.134.83.1 activate
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230 Chapter 6 MPLS VPNs and RIP
neighbor 204.134.83.1 send-community both no auto-summary
exit-address-family
!
ip classless
no ip http server
!
!
!
line con 0 exec-timeout 0 0 privilege level 15 logging synchronous transport input none
ip netmask-format decimal line aux 0
line vty 0 4 privilege level 15 password cisco logging synchronous login
ip netmask-format decimal
!
end
The configuration of the Atlanta POP router is as follows:
Atlanta#show running-config
Building configuration...
Current configuration : 1972 bytes
!
version 12.1
service timestamps debug uptime service timestamps log uptime no service password-encryption
!
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Lab: Configuring an MPLS VPN 231
hostname Atlanta
!
enable password cisco
!
!
!
!
!
memory-size iomem 25 ip subnet-zero
ip tcp synwait-time 5 no ip domain-lookup
!
!
ip cef
cns event-service server
!
!
!
!
!
interface Loopback0
ip address 204.134.83.1 255.255.255.255
!
interface Serial0/0
description *** Link to Core Router ***
ip address 204.134.83.5 255.255.255.252 tag-switching ip
no fair-queue clockrate 64000
!
interface Serial0/1
description *** Link to Peer1 ***
ip address 192.168.3.6 255.255.255.252 clockrate 64000
!
interface Serial0/2
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232 Chapter 6 MPLS VPNs and RIP
no ip address shutdown clockrate 64000
!
interface Serial0/3 no ip address shutdown
clockrate 64000
!
interface Ethernet1/0 no ip address shutdown
!
interface Ethernet1/1 no ip address shutdown
!
interface Ethernet1/2 no ip address shutdown
!
interface Ethernet1/3 no ip address shutdown
!
router rip version 2
network 204.134.83.0
!
router bgp 65000
no synchronization
bgp log-neighbor-changes
neighbor 204.134.83.3 remote-as 65000 neighbor 204.134.83.3 update-source Loopback0 neighbor 204.134.83.3 next-hop-self
no auto-summary
!
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