多区域OSPF的路由重发布

深藏阁楼爱情的钟 2022-01-15 12:15 399阅读 0赞

**一、场景设置**

![200804301209531265562.jpg][]

**说明：R1 Serial1/0 R2 Serial1/1 R3 Serial1/0 R4。需要在RB上配置路由再分配。**

**二、具体配置**

**1、RA的配置如下：**

**Router(config)\#hostname RA  
RA(config)\#interface Loopback0  
RA(config-if)\#ip address 1.1.1.1 255.255.255.0  
RA(config-if)\#ip ospf network point-to-point  
RA(config-if)\#exit  
RA(config)\#interface Serial1/0  
RA(config-if)\#ip address 199.99.1.1 255.255.255.0  
RA(config-if)\#no shutdown  
RA(config-if)\#exit  
RA(config)\#router rip  
RA(config-router)\#version 2  
RA(config-router)\#network 1.0.0.0  
RA(config-router)\#network 199.99.1.0  
RA(config-router)\#exit**

**2、RB的配置如下：**

**Router(config)\#hostname RB  
RB(config)\#interface Loopback0  
RB(config-if)\#ip address 2.2.2.2 255.255.255.0  
RB(config-if)\#ip ospf network point-to-point  
RB(config-if)\#exit  
RB(config)\#interface Serial1/0  
RB(config-if)\#ip address 199.99.1.2 255.255.255.0  
RB(config-if)\#no shutdown  
RB(config-if)\#exit  
RB(config)\#interface Serial1/1  
RB(config-if)\#ip address 199.99.2.1 255.255.255.0  
RB(config-if)\#no shutdown  
RB(config-if)\#exit  
RB(config)\#router ospf 1  
RB(config-router)\#redistribute rip subnets  
RB(config-router)\#network 199.99.2.0 0.0.0.255 area 0  
RB(config-router)\#network 2.2.2.0 0.0.0.255 area 0  
RB(config-router)\#exit  
RB(config)\#router rip  
RB(config-router)\#version 2  
RB(config-router)\#redistribute ospf 1 metric 2  
RB(config-router)\#network 199.99.1.0  
RB(config-router)\#no auto-summary  
RB(config-router)\#exit**

**3、RC的配置如下：**

**RC(config)\#hostname RC  
RC(config)\#interface Loopback0  
RC(config-if)\#ip address 3.3.3.3 255.255.255.0  
RC(config-if)\#ip ospf network point-to-point  
RC(config-if)\#exit  
RC(config)\#interface Serial1/1  
RC(config-if)\#ip address 199.99.2.2 255.255.255.0  
RC(config-if)\#no shutdown  
RC(config-if)\#exit  
RC(config)\#interface Serial1/0  
RC(config-if)\#ip address 199.99.3.1 255.255.255.0  
RC(config-if)\#no shutdown  
RC(config-if)\#exit  
RC(config)\#router ospf 1  
RC(config-router)\#network 3.3.3.0 0.0.0.255 area 1  
RC(config-router)\#network 199.99.2.0 0.0.0.255 area 0  
RC(config-router)\#network 199.99.3.0 0.0.0.255 area 1  
RC(config-router)\#exit**

**4、RD的配置如下：**

**Router(config)\#hostname RD  
RD(config)\#interface Loopback0  
RD(config-if)\#ip address 4.4.4.4 255.255.255.0  
RD(config-if)\#ip ospf network point-to-point  
RD(config-if)\#exit  
RD(config)\#interface Serial1/0  
RD(config-if)\#ip address 199.99.3.2 255.255.255.0  
RD(config-if)\#no shutdown  
RD(config-if)\#exit  
RD(config)\#router ospf 1  
RD(config-router)\#network 4.4.4.0 0.0.0.255 area 1  
RD(config-router)\#network 199.99.3.0 0.0.0.255 area 1  
RD(config-router)\#exit**

**三、验证配置**

**1、查看各路由器相关接口的开启状态：**

**RA\#show ip interface brief**  
**Interface IP-Address OK? Method Status Protocol  
Serial1/0 199.99.1.1 YES manual up up**

**Loopback0 1.1.1.1 YES manual up up**

**RB\#show ip interface brief  
Interface IP-Address OK? Method Status Protocol  
Serial1/0 199.99.1.2 YES manual up up**

**Serial1/1 199.99.2.1 YES manual up up**

**Loopback0 2.2.2.2 YES manual up up**

**RC\#show ip interface brief  
Interface IP-Address OK? Method Status Protocol  
Serial1/0 199.99.3.1 YES manual up up**

**Serial1/1 199.99.2.2 YES manual up up**

**Loopback0 3.3.3.3 YES manual up up**

**RD\#show ip interface brief  
Interface IP-Address OK? Method Status Protocol  
Serial1/0 199.99.3.2 YES manual up up**

**Loopback0 4.4.4.4 YES manual up up**

**可见相关的接口及链路协议已经处于开启状态！**

**2、查看各路由器的路由表：**

**RA\#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  
 2.0.0.0/24 is subnetted, 1 subnets  
R 2.2.2.0 \[120/2\] via 199.99.1.2, 00:00:17, Serial1/0  
3.0.0.0/24 is subnetted, 1 subnets  
R 3.3.3.0 \[120/2\] via 199.99.1.2, 00:00:17, Serial1/0  
4.0.0.0/24 is subnetted, 1 subnets  
R 4.4.4.0 \[120/2\] via 199.99.1.2, 00:00:17, Serial1/0  
R 199.99.3.0/24 \[120/2\] via 199.99.1.2, 00:00:17, Serial1/0  
R 199.99.2.0/24 \[120/2\] via 199.99.1.2, 00:00:17, Serial1/0  
C 199.99.1.0/24 is directly connected, Serial1/0**

**RB\#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**

**R 1.0.0.0/8 \[120/1\] via 199.99.1.1, 00:00:01, Serial1/0  
 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  
O IA 3.3.3.0 \[110/65\] via 199.99.2.2, 00:09:57, Serial1/1  
4.0.0.0/24 is subnetted, 1 subnets  
O IA 4.4.4.0 \[110/129\] via 199.99.2.2, 00:05:15, Serial1/1  
O IA 199.99.3.0/24 \[110/128\] via 199.99.2.2, 00:06:06, Serial1/1  
C 199.99.2.0/24 is directly connected, Serial1/1  
C 199.99.1.0/24 is directly connected, Serial1/0**

**RC\#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**

**O E2 1.0.0.0/8 \[110/20\] via 199.99.2.1, 00:06:10, Serial1/1  
2.0.0.0/24 is subnetted, 1 subnets  
O 2.2.2.0 \[110/65\] via 199.99.2.1, 00:07:01, Serial1/1  
 3.0.0.0/24 is subnetted, 1 subnets  
C 3.3.3.0 is directly connected, Loopback0  
4.0.0.0/24 is subnetted, 1 subnets  
O 4.4.4.0 \[110/65\] via 199.99.3.2, 00:06:10, Serial1/0  
C 199.99.3.0/24 is directly connected, Serial1/0  
C 199.99.2.0/24 is directly connected, Serial1/1  
O E2 199.99.1.0/24 \[110/20\] via 199.99.2.1, 00:06:10, Serial1/1**

**RD\#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**

**O E2 1.0.0.0/8 \[110/20\] via 199.99.3.1, 00:06:56, Serial1/0  
2.0.0.0/24 is subnetted, 1 subnets  
O IA 2.2.2.0 \[110/129\] via 199.99.3.1, 00:06:56, Serial1/0  
3.0.0.0/24 is subnetted, 1 subnets  
O 3.3.3.0 \[110/65\] via 199.99.3.1, 00:06:56, Serial1/0  
 4.0.0.0/24 is subnetted, 1 subnets  
C 4.4.4.0 is directly connected, Loopback0  
C 199.99.3.0/24 is directly connected, Serial1/0  
O IA 199.99.2.0/24 \[110/128\] via 199.99.3.1, 00:06:56, Serial1/0  
O E2 199.99.1.0/24 \[110/20\] via 199.99.3.1, 00:06:56, Serial1/0**

**3、在运行了OSPF协议的路由器查看邻居：**

**RB\#show ip ospf neighbor**

**Neighbor ID Pri State Dead Time Address Interface  
3.3.3.3 0 FULL/ - 00:00:38 199.99.2.2 Serial1/1**

**RC\#show ip ospf neighbor**

**Neighbor ID Pri State Dead Time Address Interface  
2.2.2.2 0 FULL/ - 00:00:31 199.99.2.1 Serial1/1  
4.4.4.4 0 FULL/ - 00:00:34 199.99.3.2 Serial1/0**

**RD\#show ip ospf neighbor**

**Neighbor ID Pri State Dead Time Address Interface  
3.3.3.3 0 FULL/ - 00:00:33 199.99.3.1 Serial1/0**

**4、在运行了OSPF协议的路由器查看OSPF数据库：**

**RB\#show ip ospf database**

**OSPF Router with ID (2.2.2.2) (Process ID 1)**

**Router Link States (Area 0)**

**Link ID ADV Router Age Seq\# Checksum Link count  
2.2.2.2 2.2.2.2 776 0x80000004 0x00D838 3  
3.3.3.3 3.3.3.3 772 0x80000002 0x00DC49 2**

**Summary Net Link States (Area 0)**

**Link ID ADV Router Age Seq\# Checksum  
3.3.3.0 3.3.3.3 780 0x80000001 0x00CC5A  
4.4.4.0 3.3.3.3 481 0x80000001 0x002BB8  
199.99.3.0 3.3.3.3 532 0x80000001 0x00C2FF**

**Type-5 AS External Link States**

**Link ID ADV Router Age Seq\# Checksum Tag  
1.0.0.0 2.2.2.2 1328 0x80000001 0x009EF8 0  
199.99.1.0 2.2.2.2 1328 0x80000001 0x00D299 0**

**RC\#show ip ospf database**

**OSPF Router with ID (3.3.3.3) (Process ID 1)**

**Router Link States (Area 0)**

**Link ID ADV Router Age Seq\# Checksum Link count  
2.2.2.2 2.2.2.2 791 0x80000004 0x00D838 3  
3.3.3.3 3.3.3.3 786 0x80000002 0x00DC49 2**

**Summary Net Link States (Area 0)**

**Link ID ADV Router Age Seq\# Checksum  
3.3.3.0 3.3.3.3 794 0x80000001 0x00CC5A  
4.4.4.0 3.3.3.3 494 0x80000001 0x002BB8  
199.99.3.0 3.3.3.3 545 0x80000001 0x00C2FF**

**Router Link States (Area 1)**

**Link ID ADV Router Age Seq\# Checksum Link count  
3.3.3.3 3.3.3.3 509 0x80000004 0x0010F0 3  
4.4.4.4 4.4.4.4 508 0x80000003 0x000FEB 3**

**Summary Net Link States (Area 1)**

**Link ID ADV Router Age Seq\# Checksum  
2.2.2.0 3.3.3.3 779 0x80000001 0x007376  
199.99.2.0 3.3.3.3 809 0x80000001 0x00CDF5**

**Summary ASB Link States (Area 1)**

**Link ID ADV Router Age Seq\# Checksum  
2.2.2.2 3.3.3.3 799 0x80000001 0x0047A0**

**Type-5 AS External Link States**

**Link ID ADV Router Age Seq\# Checksum Tag  
1.0.0.0 2.2.2.2 1363 0x80000001 0x009EF8 0  
199.99.1.0 2.2.2.2 1365 0x80000001 0x00D299 0**

**RD\#show ip ospf database**

**OSPF Router with ID (4.4.4.4) (Process ID 1)**

**Router Link States (Area 1)**

**Link ID ADV Router Age Seq\# Checksum Link count  
3.3.3.3 3.3.3.3 523 0x80000004 0x0010F0 3  
4.4.4.4 4.4.4.4 522 0x80000003 0x000FEB 3**

**Summary Net Link States (Area 1)**

**Link ID ADV Router Age Seq\# Checksum  
2.2.2.0 3.3.3.3 793 0x80000001 0x007376  
199.99.2.0 3.3.3.3 803 0x80000001 0x00CDF5**

**Summary ASB Link States (Area 1)**

**Link ID ADV Router Age Seq\# Checksum  
2.2.2.2 3.3.3.3 793 0x80000001 0x0047A0**

**Type-5 AS External Link States**

**Link ID ADV Router Age Seq\# Checksum Tag  
1.0.0.0 2.2.2.2 1357 0x80000001 0x009EF8 0  
199.99.1.0 2.2.2.2 1359 0x80000001 0x00D299 0**

本文出自 “[Uione][]” 博客，请务必保留此出处[http://weiqijun.blog.51cto.com/338163/74340][http_weiqijun.blog.51cto.com_338163_74340]

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