最近複習BGP有點High，網上有些配置都寫錯了，搞得很鬱悶，經過不斷的百度和show，終於搞定了，拓撲圖如下：
本次的PE-P-PE之間的IGP協議爲OSPF，1的PC-CE跑RIPv2(R1-R2)和OSPF(R4-R5)協議，2的PC-CE跑EIGRP(R6-R2)和靜態路由(R4-R7)協議
R1配置如下：----------------------------------------------------------------------------
ip cef
!
interface Loopback1
ip address 172.30.1.1 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.15.10 255.255.255.0
no shut
!
router rip
version 2
network 172.30.0.0
network 192.168.15.0
no auto-summary
R2配置如下：--------------------------------------------------------------------------------------
ip cef
!
no ip domain lookup
ip vrf ***1
rd 100:1
route-target export 100:1
route-target import 100:1
!
ip vrf ***2
rd 200:2
route-target export 200:2
route-target import 200:2
!
interface Loopback1
ip address 172.11.11.1 255.255.255.255
!
interface FastEthernet0/0
ip address 10.100.1.1 255.255.255.252
duplex auto
speed auto
mpls label protocol ldp
mpls ip
!
interface FastEthernet1/0
ip vrf forwarding ***1
ip address 192.168.15.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet1/1
ip vrf forwarding ***2
ip address 192.168.16.1 255.255.255.0
duplex auto
speed auto
!
router eigrp 1 1
no auto-summary
!
address-family ipv4 vrf ***2
redistribute bgp 65500 metric 100000 10 255 1 1500 1
network 192.168.16.0
no auto-summary
autonomous-system 1
exit-address-family
!
router ospf 1
log-adjacency-changes
network 10.100.1.0 0.0.0.3 area 0
network 172.11.11.1 0.0.0.0 area 0
!
router rip
version 2
no auto-summary
!
address-family ipv4 vrf ***1
redistribute bgp 65500 metric 10
network 192.168.15.0
no auto-summary
exit-address-family
!
router bgp 65500
no synchronization
bgp log-neighbor-changes
neighbor 172.12.12.4 remote-as 65500
neighbor 172.12.12.4 update-source Loopback1
no auto-summary
!
address-family ***v4
neighbor 172.12.12.4 activate
neighbor 172.12.12.4 send-community both
neighbor 172.12.12.4 next-hop-self
exit-address-family
!
address-family ipv4 vrf ***2
redistribute eigrp 1
no synchronization
exit-address-family
!
address-family ipv4 vrf ***1
redistribute rip
no synchronization
exit-address-family
R3配置如下：------------------------------------------------------------------------------------------------------------
ip cef
!
interface Loopback1
ip address 172.12.12.1 255.255.255.255
!
interface FastEthernet0/0
ip address 10.100.1.2 255.255.255.252
no shut
mpls ip
!
interface FastEthernet0/1
ip address 10.12.1.1 255.255.255.0
no shut
mpls ip
!
router ospf 1
log-adjacency-changes
network 10.12.1.0 0.0.0.255 area 0
network 10.100.1.0 0.0.0.3 area 0
network 172.12.12.1 0.0.0.0 area 0
R4配置：--------------------------------------------------------------------------------------------------
ip cef
!
ip vrf ***1
rd 100:1
route-target export 100:1
route-target import 100:1
!
ip vrf ***2
rd 200:2
route-target export 200:2
route-target import 200:2
!
interface Loopback11
ip address 172.12.12.4 255.255.255.255
!
interface FastEthernet0/0
ip address 10.12.1.2 255.255.255.0
no shut
mpls ip
!
interface FastEthernet1/0
ip vrf forwarding ***2
ip address 192.168.17.1 255.255.255.0
no shut
!
interface FastEthernet1/1
ip vrf forwarding ***1
ip address 192.168.18.1 255.255.255.0
no shut
!
router ospf 1 vrf ***1
log-adjacency-changes
redistribute bgp 65500 subnets
network 192.168.18.0 0.0.0.255 area 0
!
router ospf 11
log-adjacency-changes
network 10.12.1.0 0.0.0.255 area 0
network 172.12.12.4 0.0.0.0 area 0
!
!
router bgp 65500
no synchronization
bgp log-neighbor-changes
neighbor 172.11.11.1 remote-as 65500
neighbor 172.11.11.1 update-source Loopback11
no auto-summary
!
address-family ***v4
neighbor 172.11.11.1 activate
neighbor 172.11.11.1 send-community both
neighbor 172.11.11.1 next-hop-self
exit-address-family
!
address-family ipv4 vrf ***2
redistribute connected
redistribute static
no synchronization
exit-address-family
!
address-family ipv4 vrf ***1
redistribute ospf 1 vrf ***1
no synchronization
exit-address-family
!
ip forward-protocol nd
ip route vrf ***2 172.16.7.7 255.255.255.255 192.168.17.10
R5配置：------------------------------------------------------------------------------------------------------------------
ip cef
!
interface Loopback1
ip address 172.30.5.5 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.18.10 255.255.255.0
no shut
!
router ospf 1
log-adjacency-changes
network 172.30.5.5 0.0.0.0 area 0
network 192.168.18.0 0.0.0.255 area 0
!
R6配置：------------------------------------------------------------------------------------------------------------------
interface Loopback1
ip address 172.16.6.6 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.16.10 255.255.255.0
no shut
!
router eigrp 1
network 172.16.6.6 0.0.0.0
network 192.168.16.0
no auto-summary
R7配置：------------------------------------------------------------------------------------------------------------------
interface Loopback1
ip address 172.16.7.7 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.17.10 255.255.255.0
no shut
!
ip route 0.0.0.0 0.0.0.0 192.168.17.1
路由表信息如下：
R1上的路由表如下：
R1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.15.0/24 is directly connected, FastEthernet0/0
172.30.0.0/32 is subnetted, 2 subnets
R 172.30.5.5 [120/10] via 192.168.15.1, 00:00:25, FastEthernet0/0
C 172.30.1.1 is directly connected, Loopback1
R 192.168.18.0/24 [120/10] via 192.168.15.1, 00:00:25, FastEthernet0/0
R2的路由表：----------------------------------------------------------------------------
R2#sh ip route vrf ***1
Routing Table: ***1
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.15.0/24 is directly connected, FastEthernet1/0
172.30.0.0/32 is subnetted, 2 subnets
B 172.30.5.5 [200/200] via 172.12.12.4, 01:55:40
R 172.30.1.1 [120/1] via 192.168.15.10, 00:00:05, FastEthernet1/0
B 192.168.18.0/24 [200/0] via 172.12.12.4, 02:09:40
R2#sh ip route vrf ***2
Routing Table: ***2
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/32 is subnetted, 2 subnets
B 172.16.7.7 [200/156160] via 172.12.12.4, 00:10:47
D 172.16.6.6 [90/156160] via 192.168.16.10, 00:41:03, FastEthernet1/1
B 192.168.17.0/24 [200/0] via 172.12.12.4, 00:10:47
C 192.168.16.0/24 is directly connected, FastEthernet1/1
R5上的路由表如下
R5#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
O E2 192.168.15.0/24 [110/1] via 192.168.18.1, 13:51:58, FastEthernet0/0
172.30.0.0/32 is subnetted, 2 subnets
C 172.30.5.5 is directly connected, Loopback1
O E2 172.30.1.1 [110/1] via 192.168.18.1, 13:51:58, FastEthernet0/0
C 192.168.18.0/24 is directly connected, FastEthernet0/0
R6的路由表如下：-------------------------------------------------------------------------------------------------
R6#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/32 is subnetted, 2 subnets
D 172.16.7.7 [90/158720] via 192.168.16.1, 14:35:03, FastEthernet0/0
C 172.16.6.6 is directly connected, Loopback1
D 192.168.17.0/24 [90/30720] via 192.168.16.1, 14:35:03, FastEthernet0/0
C 192.168.16.0/24 is directly connected, FastEthernet0/0
R7的路由表如下：
R7#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is 192.168.17.1 to network 0.0.0.0
172.16.0.0/32 is subnetted, 1 subnets
C 172.16.7.7 is directly connected, Loopback1
C 192.168.17.0/24 is directly connected, FastEthernet0/0
S* 0.0.0.0/0 [1/0] via 192.168.17.1