介绍OSPF基本功能的配置过程，包括在各设备上使能OSPF、指定不同区域内的网段。

一、配置注意事项

在配置过程中，需注意以下事项：

1、骨干区域负责区域之间的路由，非骨干区域之间的路由信息必须通过骨干区域来转发。对此，OSPF有两个规定：

2、所有非骨干区域必须与骨干区域保持连通；

3、骨干区域自身也必须保持连通。

二、拓扑图

三、配置路由器

AR1：

sysname AR1

#配置路由器接口IP

interface GigabitEthernet0/0/0

ip address 192.168.255.254 24

#

interface GigabitEthernet0/0/1

ip address 12.12.12.1 30

#

interface GigabitEthernet0/0/2

#

interface LoopBack0

ip address 1.1.1.1 32

#

acl number 2001 #抓取允许的IP

rule 5 permit source 192.168.255.0 0.0.0.255

#

route-policy aa permit node 10 #配置路由策略，策略名称为aa

if-match acl 2001 #调用acl 2001

#

ospf 1 router-id 1.1.1.1 #配置ospf

import-route direct type 1 route-policy aa #路由引入路由策略

area 0.0.0.1 #配置ospf区域1

network 1.1.1.1 0.0.0.0

network 12.12.12.1 0.0.0.0 #宣告网络

AR2：

sysname AR2

#

interface GigabitEthernet0/0/0

ip address 23.23.23.2 30

#

interface GigabitEthernet0/0/1

ip address 12.12.12.2 30

#

interface LoopBack0

ip address 2.2.2.2 32

#

ospf 1 router-id 2.2.2.2

area 0.0.0.1

network 2.2.2.2 0.0.0.0

network 12.12.12.2 0.0.0.0

network 23.23.23.2 0.0.0.0

AR3：

sysname AR3

#

interface GigabitEthernet0/0/0

ip address 23.23.23.1 30

#

interface GigabitEthernet0/0/2

ip address 34.34.34.1 30

#

interface LoopBack0

ip address 3.3.3.3 32

#

ospf 1 router-id 3.3.3.3

area 0.0.0.0 #配置ospf区域0

network 3.3.3.3 0.0.0.0

network 34.34.34.1 0.0.0.0

area 0.0.0.1 #配置ospf区域1

network 23.23.23.1 0.0.0.0

AR4：

sysname AR4

#

interface GigabitEthernet0/0/0

ip address 45.45.45.2 30

#

interface GigabitEthernet0/0/2

ip address 34.34.34.2 30

#

interface LoopBack0

ip address 4.4.4.4 32

#

ospf 1 router-id 4.4.4.4

area 0.0.0.0 #配置ospf区域0

network 4.4.4.4 0.0.0.0

network 34.34.34.2 0.0.0.0

area 0.0.0.2 #配置ospf区域2

network 45.45.45.2 0.0.0.0

AR5：

sysname AR5

#

interface GigabitEthernet0/0/0

ip address 45.45.45.1 30

#

interface GigabitEthernet0/0/1

ip address 56.56.56.1 30

#

interface LoopBack0

ip address 5.5.5.5 32

#

ospf 1 router-id 5.5.5.5

area 0.0.0.2

network 5.5.5.5 0.0.0.0

network 45.45.45.1 0.0.0.0

network 56.56.56.1 0.0.0.0

AR6：

sysname AR6

#

interface GigabitEthernet0/0/0

ip address 172.16.255.254 24

#

interface GigabitEthernet0/0/1

ip address 56.56.56.2 30

#

interface LoopBack0

ip address 6.6.6.6 32

#

acl number 2001

rule 5 permit source 172.16.255.0 0.0.0.255

#

route-policy bb permit node 10

if-match acl 2001

#

ospf 1 router-id 6.6.6.6

import-route direct type 1 route-policy bb

area 0.0.0.2

network 6.6.6.6 0.0.0.0

network 56.56.56.2 0.0.0.0

四、测试

#dis ospf peer #查看AR3的OSPF邻居

#dis ospf routing #显示AR4的OSPF路由信息

#display ospf lsdb #显示AR4的LSDB(链路数据库)

#PC1去pingPC2、路由追踪tracert172.16.255.1,并在AR6G0/0/0抓包