配置单区域的OSPF(AR1220)

学会配置单区域的OSPF网络

一、实验目的

1、理解Route-id的意义

2、掌握配置单区域的OSPF网络的方法

3、理解OSPF hello-interval和dead-interval的意义

二、实验拓扑

三、实验步骤

1、基本的配置与OSPF配置 AR1：

[ar1]int g0/0/0

[ar1-GigabitEthernet0/0/0]ip add 192.168.1.1 24 [ar1-GigabitEthernet0/0/0]quit

[ar1]int g0/0/1

[ar1-GigabitEthernet0/0/1]ip add 192.168.0.1 24 [ar1-GigabitEthernet0/0/1]q [ar1]int loo0

[ar1-LoopBack0]ip add 1.1.1.1 32 [ar1-LoopBack0]q

[ar1]ospf 1 router-id 1.1.1.1 [ar1-ospf-1]area 0

[ar1-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255 [ar1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0 [ar1-ospf-1-area-0.0.0.0]q [ar1-ospf-1]q [ar1]q save all AR2：

system-view [ar2]int g0/0/0

[ar2-GigabitEthernet0/0/0]ip add 192.168.1.2 24 [ar2-GigabitEthernet0/0/0]q [ar2]int g0/0/1

[ar2-GigabitEthernet0/0/1]ip add 192.168.2.1 24 [ar2-GigabitEthernet0/0/1]q [ar2]int loo0

[ar2-LoopBack0]ip add 2.2.2.2 32 [ar2-LoopBack0]q

[ar2]ospf 1 router-id 2.2.2.2 [ar2-ospf-1]area 0

[ar2-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255 [ar2-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255 [ar2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0 [ar2-ospf-1-area-0.0.0.0]q [ar2-ospf-1]q [ar2]q

save all AR3：

system-view [ar3]int g0/0/0

[ar3-GigabitEthernet0/0/0]ip add 192.168.2.2 24 [ar3-GigabitEthernet0/0/0]q [ar3]int loo0

[ar3-LoopBack0]ip add 3.3.3.3 32 [ar3-LoopBack0]q

[ar3]ospf 1 router-id 3.3.3.3 [ar3-ospf-1]area 0

[ar3-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255 [ar3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0 [ar3-ospf-1-area-0.0.0.0]q [ar3-ospf-1]q save all

说明：一台路由器如果要运行OSPF协议，必须存在Router ID。路由器的ID是一个32比特无符号整数，是一台路由器在自治系统中的唯一标识。

路由器的ID可以手工配置，如果没有通过命令指定ID号，系统会从当前接口的IP地址中自动选取一个作为路由器的ID号。其选择顺序是：优先从Loopback地址中选择最大的IP地址作为路由器的ID号，如果没有配置Loopback接口，则在接口地址中选取最大的IP地址作为路由器的ID号。只有重新配置系统的Router ID或OSPF的Router ID，并且重新启动OSPF进程后，才会进行Router ID的重新选取。（在用户视图下用“reset ospf process”来重启进程）

2、查看ospf路由表

[ar1]display ip routing-table

Route Flags: R - relay, D - download to fib

------------------------------------------------------------------------------ Routing Tables: Public

Destinations : 14 Routes : 14

Destination/Mask Proto Pre Cost Flags NextHop Interface

1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack0

2.2.2.2/32 OSPF 10 1 D 192.168.1.2 GigabitEthernet0/0/0 3.3.3.3/32 OSPF 10 2 D 192.168.1.2 GigabitEthernet0/0/0 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0

192.168.0.0/24 Direct 0 0 D 192.168.0.1 GigabitEthernet0/0/1 192.168.0.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/1 192.168.0.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/1 192.168.1.0/24 Direct 0 0 D 192.168.1.1 GigabitEthernet0/0/0 192.168.1.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0 192.168.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0 192.168.2.0/24 OSPF 10 2 D 192.168.1.2 GigabitEthernet0/0/0 255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0

[ar2]display ip routing-table

Route Flags: R - relay, D - download to fib

------------------------------------------------------------------------------ Routing Tables: Public

Destinations : 14 Routes : 14

Destination/Mask Proto Pre Cost Flags NextHop Interface

1.1.1.1/32 OSPF 10 1 D 192.168.1.1 GigabitEthernet0/0/0 2.2.2.2/32 Direct 0 0 D 127.0.0.1 LoopBack0

3.3.3.3/32 OSPF 10 1 D 192.168.2.2 GigabitEthernet0/0/1 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0

192.168.0.0/24 OSPF 10 2 D 192.168.1.1 GigabitEthernet0/0/0 192.168.1.0/24 Direct 0 0 D 192.168.1.2 GigabitEthernet0/0/0 192.168.1.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0 192.168.1.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0 192.168.2.0/24 Direct 0 0 D 192.168.2.1 GigabitEthernet0/0/1