OSPF 多鏈路分流實驗
R1:
interface Loopback0
ip address 1.1.1.1 255.255.255.0
interface Serial0/0
ip address 172.16.1.1 255.255.255.252
serial restart-delay 0
interface Serial0/1
ip address 172.16.1.5 255.255.255.252
serial restart-delay 0
router ospf 10
router-id 1.1.1.1
log-adjacency-changes
network 1.1.1.0 0.0.0.255 area 1
network 172.16.1.0 0.0.0.3 area 0
network 172.16.1.4 0.0.0.3 area 0
end
R2:
interface Loopback0
ip address 2.2.2.2 255.255.255.0
interface Loopback1
ip address 4.4.4.4 255.255.255.0
interface Loopback2
ip address 3.3.3.3 255.255.255.0
interface Serial0/0
ip address 172.16.1.2 255.255.255.252
serial restart-delay 0
interface Serial0/1
ip address 172.16.1.6 255.255.255.252
serial restart-delay 0
router ospf 10
router-id 3.3.3.3
log-adjacency-changes
network 2.2.2.0 0.0.0.255 area 2
network 3.3.3.0 0.0.0.255 area 0
network 4.4.4.0 0.0.0.255 area 4
network 172.16.1.0 0.0.0.3 area 0
network 172.16.1.4 0.0.0.3 area 0
end
測試R1、R2的鄰接關係和路由表：
R1:
R1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
3.3.3.3 0 FULL/ - 00:00:38 172.16.1.6 Serial0/1
3.3.3.3 0 FULL/ - 00:00:37 172.16.1.2 Serial0/0
R1#show 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
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
2.0.0.0/32 is subnetted, 1 subnets
O IA 2.2.2.2 [110/65] via 172.16.1.6, 00:02:03, Serial0/1
[110/65] via 172.16.1.2, 00:02:03, Serial0/0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/65] via 172.16.1.6, 00:02:03, Serial0/1
[110/65] via 172.16.1.2, 00:02:03, Serial0/0
4.0.0.0/32 is subnetted, 1 subnets
O IA 4.4.4.4 [110/65] via 172.16.1.6, 00:00:23, Serial0/1
[110/65] via 172.16.1.2, 00:00:26, Serial0/0
172.16.0.0/30 is subnetted, 2 subnets
C 172.16.1.4 is directly connected, Serial0/1
C 172.16.1.0 is directly connected, Serial0/0
R2:
R2#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 0 FULL/ - 00:00:30 172.16.1.5 Serial0/1
1.1.1.1 0 FULL/ - 00:00:39 172.16.1.1 Serial0/0
R2#show 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
O IA 1.1.1.1 [110/65] via 172.16.1.5, 00:08:29, Serial0/1
[110/65] via 172.16.1.1, 00:08:29, Serial0/0
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback2
4.0.0.0/24 is subnetted, 1 subnets
C 4.4.4.0 is directly connected, Loopback1
172.16.0.0/30 is subnetted, 2 subnets
C 172.16.1.4 is directly connected, Serial0/1
C 172.16.1.0 is directly connected, Serial0/0
配置多鏈路分流，讓R2的2.2.2.0/24走S0/0,讓R2的4.4.4.4/24走S0/1。
access-list 1 deny 3.3.3.0 0.0.0.255
access-list 1 deny 4.4.4.0 0.0.0.255
access-list 1 permit any
access-list 2 deny 2.2.2.0 0.0.0.255
access-list 2 deny 3.3.3.0 0.0.0.255
access-list 2 permit any
router ospf 10
router-id 1.1.1.1
distribute-list 1 in Serial0/0
distribute-list 2 in Serial0/1
查看分流後的效果：
R1#show 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
1.0.0.0/24 is subnetted, 1 subnets
C 1.1.1.0 is directly connected, Loopback0
2.0.0.0/32 is subnetted, 1 subnets
O IA 2.2.2.2 [110/65] via 172.16.1.2, 00:00:20, Serial0/0
4.0.0.0/32 is subnetted, 1 subnets
O IA 4.4.4.4 [110/65] via 172.16.1.6, 00:00:20, Serial0/1
172.16.0.0/30 is subnetted, 2 subnets
C 172.16.1.4 is directly connected, Serial0/1
C 172.16.1.0 is directly connected, Serial0/0