之前學了一篇文章說的是isp mpls 網絡，主要說的是在一臺設備上有兩個公司需要通過專業分別進行互通。A-A B-B. 前面A和isp使用的是ospf進行路由信息交換，B使用靜態路由指向isp網關。
今天帶來的是單企業mpls ***互通。一遍網絡使用eigrp和PE端互通，另一端使用rip和PE端互通，P-PE使用ospf進行互通。
拓撲如下：
目的：通過mpls網絡爲CE-A 和CE-B建立快速交換通道。使CE-A的loopback 0 能訪問Ce-B的loopback 0
ip地址規劃：
CE-A10.1.12.1 L0 1.1.1.1
PE-A 10.1.12.2 10.1.23.2 2.2.2.2
P 10.1.23.3 10.1.34.3 3.3.3.3
PE-B 10.1.34.4 10.1.45.4 4.4.4.4
CE-B 10.1.45.5 5.5.5.5 所有互聯地址爲24位，loopback地址爲32位
CE-A配置如下：
router ei 90
network 10.1.12.1 0.0.0.0
network 1.1.1.1 0.0.0.0
因爲是CE端沒有其他配置了。
PE-A：
ip vrf a
rd 1:1
rt 1:1
int f0/0
ip vrf forwarding a
ip add 10.1.12.2 255.255.255.0
int f0/1
ip address 10.1.23.2 255.255.255.0
mpls ip
int l 0
ip add 2.2.2.2 255.255.255.255
router eigrp 90
address-family ipv4 vrf a
redistribute bgp 1 metric 1 1 1 1 1
network 10.1.12.2 0.0.0.0
no auto-summary
autonomous-system 90
exit-address-family -----與CE-A互聯
router ospf 1 ------mpls網絡互聯
router-id 2.2.2.2
log-adjacency-changes
network 2.2.2.2 0.0.0.0 area 0
network 10.1.23.2 0.0.0.0 area 0
!
router bgp 1 --------mbgp傳遞私網路由
no bgp default ipv4-unicast
bgp log-neighbor-changes
neighbor 4.4.4.4 remote-as 1
neighbor 4.4.4.4 ebgp-multihop 255
neighbor 4.4.4.4 update-source Loopback0
!
address-family ***v4
neighbor 4.4.4.4 activate
neighbor 4.4.4.4 send-community extended
neighbor 4.4.4.4 next-hop-self
exit-address-family
!
address-family ipv4 vrf a
redistribute eigrp 90 metric 1 ----metric值不設置對端rip學習到cost太大，不放入路由表。（之前一直CE-B學習不到1.1.1.1這條路由，修改cost後才行）
no synchronization
exit-address-family
P:
interface Loopback0
ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0
ip address 10.1.23.3 255.255.255.0
duplex auto
speed auto
mpls ip
interface FastEthernet0/1
ip address 10.1.34.3 255.255.255.0
duplex auto
speed auto
mpls ip
router ospf 1
router-id 3.3.3.3
log-adjacency-changes
network 3.3.3.3 0.0.0.0 area 0
network 10.1.23.3 0.0.0.0 area 0
network 10.1.34.3 0.0.0.0 area 0
P主要是接口開啓mpls ip 建立mpls網絡，爲路由傳遞標籤。
PE-B：
ip vrf a
rd 1:1
route-target export 1:1
route-target import 1:1
interface Loopback0
ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/0
ip address 10.1.34.4 255.255.255.0
duplex auto
speed auto
mpls ip
interface FastEthernet0/1
ip vrf forwarding a
ip address 10.1.45.4 255.255.255.0
duplex auto
speed auto
router ospf 1
log-adjacency-changes
network 4.4.4.4 0.0.0.0 area 0
network 10.1.34.4 0.0.0.0 area 0
router rip
version 2
address-family ipv4 vrf a
redistribute bgp 1 metric transparent
network 10.0.0.0
no auto-summary
exit-address-family
router bgp 1
no bgp default ipv4-unicast
bgp log-neighbor-changes
neighbor 2.2.2.2 remote-as 1
neighbor 2.2.2.2 update-source Loopback0
!
address-family ipv4
neighbor 2.2.2.2 activate
no auto-summary
no synchronization
exit-address-family
!
address-family ***v4
neighbor 2.2.2.2 activate
neighbor 2.2.2.2 send-community extended
exit-address-family
!
address-family ipv4 vrf a
redistribute rip
no synchronization
exit-address-family
CE-B：
router rip
version 2
network 5.0.0.0
network 10.0.0.0
no auto-summary
驗證結果：
CE-A#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
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
5.0.0.0/32 is subnetted, 1 subnets
D EX 5.5.5.5 [170/2560025856] via 10.1.12.2, 00:44:04, FastEthernet0/0
10.0.0.0/24 is subnetted, 2 subnets
C 10.1.12.0 is directly connected, FastEthernet0/0
D EX 10.1.45.0 [170/2560025856] via 10.1.12.2, 00:44:04, FastEthernet0/0
在CE-A上已經學習到了對端CE-B的路由信息。
CE-A#ping 5.5.5.5 so 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.5, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 40/42/48 ms
PE-A#sh mpls forwarding-table 查看標籤信息，主要用於排錯
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 16 4.4.4.4/32 0 Fa0/1 10.1.23.3
17 Pop tag 3.3.3.3/32 0 Fa0/1 10.1.23.3
18 Pop tag 10.1.34.0/24 0 Fa0/1 10.1.23.3
19 Untagged 1.1.1.1/32[V] 456 Fa0/0 10.1.12.1
20 Aggregate 10.1.12.0/24[V] 0
P#sh mpls ldp neighbor 查看ldp鄰居
Peer LDP Ident: 4.4.4.4:0; Local LDP Ident 3.3.3.3:0
TCP connection: 4.4.4.4.45281 - 3.3.3.3.646
State: Oper; Msgs sent/rcvd: 61/62; Downstream
Up time: 00:46:58
LDP discovery sources:
FastEthernet0/1, Src IP addr: 10.1.34.4
Addresses bound to peer LDP Ident:
10.1.34.4 4.4.4.4
Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 3.3.3.3:0
TCP connection: 2.2.2.2.646 - 3.3.3.3.21529
State: Oper; Msgs sent/rcvd: 61/62; Downstream
Up time: 00:46:48
LDP discovery sources:
FastEthernet0/0, Src IP addr: 10.1.23.2
Addresses bound to peer LDP Ident:
10.1.23.2 2.2.2.2
PE-B#sh ip rou vrf a 查看vrf路由表
Routing Table: a
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
1.0.0.0/32 is subnetted, 1 subnets
B 1.1.1.1 [200/1] via 2.2.2.2, 00:47:09
5.0.0.0/32 is subnetted, 1 subnets
R 5.5.5.5 [120/1] via 10.1.45.5, 00:00:18, FastEthernet0/1
10.0.0.0/24 is subnetted, 2 subnets
B 10.1.12.0 [200/0] via 2.2.2.2, 00:47:09
C 10.1.45.0 is directly connected, FastEthernet0/1