一.基本配置
R1#sh ip int br | in up
Serial0/0 12.12.12.1 YES manual up up
Serial0/1 14.14.14.1 YES manual up up
Serial0/2 15.15.15.1 YES manual up up
Loopback0 1.1.1.1 YES manual up up
R2#sh ip int br | in up
Serial0/0 12.12.12.2 YES manual up up
Serial0/1 23.23.23.2 YES manual up up
Loopback0 2.2.2.2 YES manual up up
R3#sh ip int br | in up
Serial0/0 23.23.23.3 YES manual up up
Serial0/1 36.36.36.3 YES manual up up
Serial0/2 37.37.37.3 YES manual up up
Loopback0 3.3.3.3 YES manual up up
R4#sh ip int br | in up
Serial0/0 14.14.14.4 YES manual up up
Loopback0 192.168.0.1 YES manual up up
R5#sh ip int br | in up
Serial0/0 15.15.15.5 YES manual up up
Loopback0 192.168.0.1 YES manual up up
R6#sh ip int br | in up
Serial0/0 36.36.36.6 YES manual up up
Loopback0 192.168.1.1 YES manual up up
R7#sh ip int br | in up
Serial0/0 37.37.37.7 YES manual up up
Loopback0 192.168.1.1 YES manual up up
R1
router ospf 1
network 1.1.1.1 0.0.0.0 area 0
network 12.12.12.1 0.0.0.0 area 0
R2
router ospf 1
network 2.2.2.2 0.0.0.0 area 0
network 12.12.12.2 0.0.0.0 area 0
network 23.23.23.2 0.0.0.0 area 0
R3
router ospf 1
network 3.3.3.3 0.0.0.0 area 0
network 23.23.23.3 0.0.0.0 area 0
二.MPLS基本配置
R1(config)#int s0/0
R1(config-if)#mpls label protocol ldp
R1(config-if)#mpls ip
R2(config)#int s0/0
R2(config-if)#mpls label protocol ldp
R2(config-if)#mpls ip
R3(config)#int s0/0
R3(config-if)#mpls label protocol ldp
R3(config-if)#mpls ip
三.vrf及相关配置
R1(config)#ip vrf v46
R1(config-vrf)#rd 100:46
R1(config-vrf)#route-target both 100:46
R1(config-vrf)#ip vrf v57
R1(config-vrf)#rd 100:57
R1(config-vrf)#route-target both 100:57
R1(config-vrf)#int s0/1
R1(config-if)#ip vrf forwarding v46
% Interface Serial0/1 IP address 14.14.14.1 removed due to enabling VRF v46
R1(config-if)#ip add 14.14.14.1 255.255.255.0
R1(config-if)#int s0/2
R1(config-if)#ip vrf f
R1(config-if)#ip vrf forwarding v57
% Interface Serial0/2 IP address 15.15.15.1 removed due to enabling VRF v57
R1(config-if)#ip add 15.15.15.1 255.255.255.0
R3
ip vrf v46
rd 100:46
route-target export 100:46
route-target import 100:46
!
ip vrf v57
rd 100:57
route-target export 100:57
route-target import 100:57
!
interface Serial0/1
ip vrf forwarding v46
ip address 36.36.36.3 255.255.255.0
!
interface Serial0/2
ip vrf forwarding v57
ip address 37.37.37.3 255.255.255.0
四.配置普通BGP
R1(config)#router bgp 100
R1(config-router)#neighbor 3.3.3.3 remote-as 100
R1(config-router)#neighbor 3.3.3.3 update-source loopback 0
R3
!
router bgp 100
bgp log-neighbor-changes
neighbor 1.1.1.1 remote-as 100
neighbor 1.1.1.1 update-source Loopback0
五.配置PE-CE间路由协议
(1)R1与R4,R5之间
R1(config)#router rip
R1(config-router)#no auto-summary
R1(config-router)#version 2
R1(config-router)#address-family ipv4 vrf v46
R1(config-router-af)#version 2
R1(config-router-af)#no auto-summary
R1(config-router-af)#network 14.0.0.0
R1(config-router-af)#redistribute bgp 100 metric 1
R1(config-router-af)#router os 2 vrf v57
R1(config-router)#router-id 15.15.15.1
R1(config-router)#network 15.15.15.1 0.0.0.0 a 0
R1(config-router)#redistribute bgp 100 subnets
R4
router rip
version 2
network 14.0.0.0
network 192.168.0.0
no auto-summary
R5
router ospf 1
network 15.15.15.5 0.0.0.0 area 0
network 192.168.0.1 0.0.0.0 area 0
(2)R3与R6,R7之间
R3(config)#router eigrp 1
R3(config-router)#no auto-summary
R3(config-router)#address-family ipv4 vrf v46
R3(config-router-af)#no auto-summary
R3(config-router-af)#autonomous-system 1
R3(config-router-af)#network 36.0.0.0
R3(config-router-af)#redistribute bgp 100 metric 10000 1000 255 100 1500
R3(config)#ip route vrf v57 192.168.1.1 255.255.255.255 37.37.37.7
R6
router eigrp 1
network 36.0.0.0
network 192.168.1.0
no auto-summary
R7
ip route 192.168.0.1 255.255.255.255 37.37.37.3
六.配置MBGP
R1(config)#router bgp 100
R1(config-router)#address-family vpnv4
R1(config-router-af)#neighbor 3.3.3.3 activate
R1(config-router-af)#neighbor 3.3.3.3 send-community both
R1(config-router)#address-family ipv4 vrf v57
R1(config-router-af)#redistribute ospf 2 vrf v57
R1(config-router-af)#address-family ipv4 vrf v46
R1(config-router-af)#redistribute rip
R3(config)#router bgp 100
R3(config-router)#address-family vpnv4
R3(config-router-af)#neighbor 1.1.1.1 activate
R3(config-router-af)#neighbor 1.1.1.1 send-community both
R3(config-router-af)#address-family ipv4 vrf v46
R3(config-router-af)#redistribute eigrp 1
R3(config-router-af)#address-family ipv4 vrf v57
R3(config-router-af)#redistribute static
七.查看配置
R1#sh ip bgp vpnv4 vrf v46 | in /
*> 14.14.14.0/24 0.0.0.0 0 32768 ?
*>i36.36.36.0/24 3.3.3.3 0 100 0 ?
*> 192.168.0.1/32 14.14.14.4 1 32768 ?
*>i192.168.1.1/32 3.3.3.3 2297856 100 0 ?
R1#sh ip bgp vpnv4 vrf v57 | in /
*> 15.15.15.0/24 0.0.0.0 0 32768 ?
*> 192.168.0.1/32 15.15.15.5 65 32768 ?
*>i192.168.1.1/32 3.3.3.3 0 100 0 ?
R3#sh ip bgp vpnv4 vrf v46 | in /
*>i14.14.14.0/24 1.1.1.1 0 100 0 ?
*> 36.36.36.0/24 0.0.0.0 0 32768 ?
*>i192.168.0.1/32 1.1.1.1 1 100 0 ?
*> 192.168.1.1/32 36.36.36.6 2297856 32768 ?
R3#sh ip bgp vpnv4 vrf v57 | in /
*>i15.15.15.0/24 1.1.1.1 0 100 0 ?
*>i192.168.0.1/32 1.1.1.1 65 100 0 ?
*> 192.168.1.1/32 37.37.37.7 0 32768 ?
R1#sh ip ro v v46 | in /
36.0.0.0/24 is subnetted, 1 subnets
B 36.36.36.0 [200/0] via 3.3.3.3, 00:06:13
192.168.0.0/32 is subnetted, 1 subnets
R 192.168.0.1 [120/1] via 14.14.14.4, 00:00:20, Serial0/1
192.168.1.0/32 is subnetted, 1 subnets
B 192.168.1.1 [200/2297856] via 3.3.3.3, 00:06:13
14.0.0.0/24 is subnetted, 1 subnets
C 14.14.14.0 is directly connected, Serial0/1
R1#sh ip ro v v57 | in /
192.168.0.0/32 is subnetted, 1 subnets
O 192.168.0.1 [110/65] via 15.15.15.5, 00:38:21, Serial0/2
192.168.1.0/32 is subnetted, 1 subnets
B 192.168.1.1 [200/0] via 3.3.3.3, 00:06:33
15.0.0.0/24 is subnetted, 1 subnets
C 15.15.15.0 is directly connected, Serial0/2
R3#sh ip ro v v46 | in /
36.0.0.0/24 is subnetted, 1 subnets
C 36.36.36.0 is directly connected, Serial0/1
192.168.0.0/32 is subnetted, 1 subnets
B 192.168.0.1 [200/1] via 1.1.1.1, 00:08:03
192.168.1.0/32 is subnetted, 1 subnets
D 192.168.1.1 [90/2297856] via 36.36.36.6, 00:30:39, Serial0/1
14.0.0.0/24 is subnetted, 1 subnets
B 14.14.14.0 [200/0] via 1.1.1.1, 00:08:03
R3#sh ip ro v v57 | in /
37.0.0.0/24 is subnetted, 1 subnets
C 37.37.37.0 is directly connected, Serial0/2
192.168.0.0/32 is subnetted, 1 subnets
B 192.168.0.1 [200/65] via 1.1.1.1, 00:08:08
192.168.1.0/32 is subnetted, 1 subnets
S 192.168.1.1 [1/0] via 37.37.37.7
15.0.0.0/24 is subnetted, 1 subnets
B 15.15.15.0 [200/0] via 1.1.1.1, 00:08:08
在R6 R7上开启debug ip icmp
R5#ping 192.168.1.1 so 192.168.0.1 r 1
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.0.1
!
Success rate is 100 percent (1/1), round-trip min/avg/max = 72/72/72 ms
R7#
*Mar 1 01:14:28.987: ICMP: echo reply sent, src 192.168.1.1, dst 192.168.0.1
--------------------------------------------------------------------------------------------------------
R4#ping 192.168.1.1 so 192.168.0.1 r 2
Type escape sequence to abort.
Sending 2, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.0.1
!!
Success rate is 100 percent (2/2), round-trip min/avg/max = 60/100/140 ms
R6#
*Mar 1 01:15:30.839: ICMP: echo reply sent, src 192.168.1.1, dst 192.168.0.1
*Mar 1 01:15:30.975: ICMP: echo reply sent, src 192.168.1.1, dst 192.168.0.1
