不同区域router-id 相同实验（不带ASBR）（原创）

拓扑如下：

 

 

这个实验中配置如下：

R1：

interface Loopback0
 ip address 192.168.1.1 255.255.255.0

 

interface Serial1/1
 ip address 10.10.12.1 255.255.255.252

router ospf 100
 router-id 1.1.1.1
 log-adjacency-changes
 network 10.10.12.0 0.0.0.3 area 1
 network 192.168.1.0 0.0.0.255 area 1

R2：

interface Serial1/0
 ip address 10.10.12.2 255.255.255.252
 serial restart-delay 0
 clock rate 64000
!
interface Serial1/1
 ip address 10.10.23.1 255.255.255.252
 serial restart-delay 0
 clock rate 64000

router ospf 100
 router-id 2.2.2.2
 log-adjacency-changes
 network 10.10.12.0 0.0.0.3 area 1
 network 10.10.23.0 0.0.0.3 area 0

R3：

interface Loopback0
 ip address 192.168.2.1 255.255.255.0

interface Serial1/0
 ip address 10.10.23.2 255.255.255.252

router ospf 100
 router-id 1.1.1.1
 log-adjacency-changes
 network 10.10.23.0 0.0.0.3 area 0
 network 192.168.2.0 0.0.0.255 area 0

查看相应路由表：

R1(config-router)#do 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

     10.0.0.0/30 is subnetted, 2 subnets
C       10.10.12.0 is directly connected, Serial1/1
O IA    10.10.23.0 [110/128] via 10.10.12.2, 00:42:00, Serial1/1
C    192.168.1.0/24 is directly connected, Loopback0
     192.168.2.0/32 is subnetted, 1 subnets
O IA    192.168.2.1 [110/129] via 10.10.12.2, 00:40:43, Serial1/1

 

R2(config-router)#do 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

     10.0.0.0/30 is subnetted, 2 subnets
C       10.10.12.0 is directly connected, Serial1/0
C       10.10.23.0 is directly connected, Serial1/1
     192.168.1.0/32 is subnetted, 1 subnets
O       192.168.1.1 [110/65] via 10.10.12.1, 00:42:20, Serial1/0
     192.168.2.0/32 is subnetted, 1 subnets
O       192.168.2.1 [110/65] via 10.10.23.2, 00:41:02, Serial1/1

 

R3(config-router)#do 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

     10.0.0.0/30 is subnetted, 2 subnets
O IA    10.10.12.0 [110/128] via 10.10.23.1, 00:41:28, Serial1/0
C       10.10.23.0 is directly connected, Serial1/0
     192.168.1.0/32 is subnetted, 1 subnets
O IA    192.168.1.1 [110/129] via 10.10.23.1, 00:41:28, Serial1/0
C    192.168.2.0/24 is directly connected, Loopback0

 

路由表没有异常，进行PING包测试：

R1#ping 192.168.2.1 so 192.168.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.1.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/23/48 ms
R1#

 

一切正常。后面要研究一下，带ASBR的情况。