MPLS VPN Case1

如下图示：

实验目标：CE1和CE2的Loopback0互通。
实验环境：
1.P、PE1和PE2是运营商路由器。CE1和CE2是VPN用户。
2.P、PE1和PE2运行OSPF 进程号1 Area 0。
3.PE1和PE2为iBGP AS 1。
4.CE1和CE2采用RIP V2。

实验步骤：
1.在P、PE1和PE2路由器启用ip cef。
2.在P、PE1和PE2路由器的互连接口启用mpls ip
3.在P、PE1和PE2配置ospf 1。
4.查看mpls vpn相关命令：
show mpls ldp neighbor
show mpls interface
show mpls forwarding-table
5.在PE路由器启用ip vrf、配置rd、在与CE相连接口启用ip vrf forwading和RIP路由
6.在PE1和PE2上配置iBGP、Address-family vpnv4的配置。
7.在PE1和PE2配置bgp和RIP相互间双向路由重分布。
8.在CE1和CE2配置loopback0和相连PE的接口，RIP V2配置。
9.在CE1 ping 5.5.5.5 source 4.4.4.4,在CE2 ping 4.4.4.4 source 5.5.5.5。

P、PE1和PE2 三位一体MPLS VPN主体OSPF贯通。
P:
ip cef
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0
 ip address 12.1.1.1 255.255.255.0
 mpls ip
 no sh
interface FastEthernet0/1
 ip address 13.1.1.1 255.255.255.0
 mpls ip
 no sh
router ospf 1
 router-id 1.1.1.1
 network 1.1.1.1 0.0.0.0 area 0
 network 12.1.1.0 0.0.0.255 area 0
 network 13.1.1.0 0.0.0.255 area 0
PE1:
ip cef
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
interface FastEthernet0/0
 ip address 12.1.1.2 255.255.255.0
 mpls ip
 no sh
router ospf 1
 router-id 2.2.2.2
 network 2.2.2.2 0.0.0.0 area 0
 network 12.1.1.0 0.0.0.255 area 0
PE2:
ip cef
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/1
 ip address 13.1.1.3 255.255.255.0
 mpls ip
 no sh
router ospf 1
 router-id 3.3.3.3
 network 3.3.3.3 0.0.0.0 area 0
 network 13.1.1.0 0.0.0.255 area 0

用户VRF配置：
PE1:
ip vrf apple
 rd 45.1.1.2:45         //每个PE的rd和route-target是一样的。
 route-target export 45.1.1.2:45
 route-target import 45.1.1.2:45
interface FastEthernet0/1
 ip vrf forwarding apple
 ip address 24.1.1.2 255.255.255.0
 no sh
router rip
 version 2
 address-family ipv4 vrf apple
 network 24.0.0.0
PE2:
ip vrf apple
 rd 45.1.1.2:45         //每个PE的rd和route-target是一样的。
 route-target export 45.1.1.2:45
 route-target import 45.1.1.2:45
interface FastEthernet0/1
 ip vrf forwarding apple
 ip address 35.1.1.3 255.255.255.0
 no sh
router rip
 version 2
 address-family ipv4 vrf apple
 network 35.0.0.0

PE1和PE2之间的iBGP配置：
PE1:
router bgp 1
 bgp router-id 2.2.2.2
 neighbor 3.3.3.3 remote-as 1
 neighbor 3.3.3.3 update-source Loopback0
 address-family vpnv4
  neighbor 3.3.3.3 activate
  neighbor 3.3.3.3 send-community both
PE2:
router bgp 1
 bgp router-id 3.3.3.3
 neighbor 2.2.2.2 remote-as 1
 neighbor 2.2.2.2 update-source Loopback0
 address-family vpnv4
  neighbor 2.2.2.2 activate
  neighbor 2.2.2.2 send-community both

BGP和RIP双向路由重分发
PE1:
router rip
 address-family ipv4 vrf apple
  redistribute bgp 1 metric transparent
router bgp 1
 address-family ipv4 vrf apple
  redistribute rip
PE2:
router rip
 address-family ipv4 vrf apple
  redistribute bgp 1 metric transparent
router bgp 1
 address-family ipv4 vrf apple
  redistribute rip

CE1和CE2配置
CE1:
interface Loopback0
 ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/1
 ip address 24.1.1.4 255.255.255.0
 no sh
router rip
 version 2
 network 4.0.0.0
 network 24.0.0.0
CE2:
interface Loopback0
 ip address 5.5.5.5 255.255.255.255
interface FastEthernet0/0
 ip address 35.1.1.5 255.255.255.0
 no sh
router rip
 version 2
 network 5.0.0.0
 network 35.0.0.0

为了实验的完整性，特把P、PE1和PE2的完整配置一次性show出来供大家查对。

P:
ip cef
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0
 ip address 12.1.1.1 255.255.255.0
 mpls ip
 no sh
interface FastEthernet0/1
 ip address 13.1.1.1 255.255.255.0
 mpls ip
 no sh
router ospf 1
 router-id 1.1.1.1
 network 1.1.1.1 0.0.0.0 area 0
 network 12.1.1.0 0.0.0.255 area 0
 network 13.1.1.0 0.0.0.255 area 0

PE1:
hostname PE1
ip cef
ip vrf apple
 rd 45.1.1.2:45
 route-target export 45.1.1.2:45
 route-target import 45.1.1.2:45
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
interface FastEthernet0/0
 ip address 12.1.1.2 255.255.255.0
 mpls ip
 no sh
interface FastEthernet0/1
 ip vrf forwarding apple
 ip address 24.1.1.2 255.255.255.0
 no sh
router ospf 1
 router-id 2.2.2.2
 network 2.2.2.2 0.0.0.0 area 0
 network 12.1.1.0 0.0.0.255 area 0
router rip
 version 2
 address-family ipv4 vrf apple
  redistribute bgp 1 metric transparent
  network 24.0.0.0
router bgp 1
 no synchronization
 bgp router-id 2.2.2.2
 neighbor 3.3.3.3 remote-as 1
 neighbor 3.3.3.3 update-source Loopback0
 address-family vpnv4
  neighbor 3.3.3.3 activate
  neighbor 3.3.3.3 send-community both
 address-family ipv4 vrf apple
  redistribute rip

PE2:
hostname PE2
ip cef
ip vrf apple
 rd 45.1.1.2:45
 route-target export 45.1.1.2:45
 route-target import 45.1.1.2:45
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0
 ip vrf forwarding apple
 ip address 35.1.1.3 255.255.255.0
 no sh
interface FastEthernet0/1
 ip address 13.1.1.3 255.255.255.0
 mpls ip
 no sh
router ospf 1
 router-id 3.3.3.3
 network 3.3.3.3 0.0.0.0 area 0
 network 13.1.1.0 0.0.0.255 area 0
router rip
 version 2
 address-family ipv4 vrf apple
  redistribute bgp 1 metric transparent
  network 35.0.0.0
router bgp 1
 bgp router-id 3.3.3.3
 neighbor 2.2.2.2 remote-as 1
 neighbor 2.2.2.2 update-source Loopback0
 address-family vpnv4
  neighbor 2.2.2.2 activate
  neighbor 2.2.2.2 send-community both
 address-family ipv4 vrf apple
  redistribute rip