OSPF_1

实验拓扑图：

 实验要求：

要求4配置：

R1：int g/0/0

        ospf dr-priority 0

【将优先级修改为0或者将网络类型修改为P-2-P后，将不能选举DR、BDR】

要求5的配置：

R3：ospf 1
        a 1
       nssa
       nssa no-summary
R4：ospf 1
        a 1
        nssa
        nssa no-summary

配置nssa前R4的LSDB：

 修改后的LSDB：

 要求9的配置：

R3：int g/0/1

       ospf dr-priority 100

【修改接口优先级即可，优先级为0就失去参加选举DR的资格。

优先级最大为DR，优先级相等时，看route-id。如果，将接口优先级修改之后，
还是不能顺利成为DR，此时可重启OSPF进程，或者shutdown掉接口再no shutdown。

】

各个路由设备的配置：

R5：

interface GigabitEthernet0/0/0
ip address 192.168.10.1 255.255.255.0
ospf dr-priority 0
#

interface LoopBack0
ip address 100.1.1.1 255.255.255.0
#

ospf 1 router-id 100.1.1.1
area 0.0.0.2
network 100.1.1.0 0.0.0.255
network 192.168.10.0 0.0.0.255
#

R1：

interface GigabitEthernet0/0/0
ip address 192.168.10.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.20.1 255.255.255.0
#

interface LoopBack0
ip address 1.1.1.1 255.255.255.0
#
ospf 1 router-id 1.1.1.1
area 0.0.0.0
network 192.168.20.0 0.0.0.255
area 0.0.0.2
network 1.1.1.0 0.0.0.255
network 192.168.10.0 0.0.0.255
#

R2：

interface GigabitEthernet0/0/0
ip address 192.168.20.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.30.1 255.255.255.0
#

interface LoopBack0
ip address 2.2.2.2 255.255.255.0
#
ospf 1 router-id 2.2.2.2
area 0.0.0.0
network 2.2.2.0 0.0.0.255
network 192.168.20.0 0.0.0.255
network 192.168.30.0 0.0.0.255

R3：

interface GigabitEthernet0/0/0
ip address 192.168.30.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.40.1 255.255.255.0
ospf dr-priority 100

#

interface LoopBack0
ip address 3.3.3.3 255.255.255.0
#
ospf 1 router-id 3.3.3.3
area 0.0.0.0
network 3.3.3.0 0.0.0.255
network 192.168.30.0 0.0.0.255
area 0.0.0.1
abr-summary 192.168.32.0 255.255.224.0
network 192.168.40.0 0.0.0.255
nssa no-summary
#

R4：

interface GigabitEthernet0/0/0
ip address 192.168.40.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 192.168.50.1 255.255.255.0
#

interface LoopBack0
ip address 4.4.4.4 255.255.255.0
#
ospf 1 router-id 4.4.4.4
import-route rip 1 route-policy 1
area 0.0.0.1
network 4.4.4.0 0.0.0.255
network 192.168.40.0 0.0.0.255
nssa no-summary
#

rip 1
version 2
network 192.168.50.0
import-route ospf 1 route-policy 1
#

R6：

interface GigabitEthernet0/0/0
ip address 192.168.50.2 255.255.255.0
#

interface LoopBack0
ip address 200.1.1.1 255.255.255.0
#
rip 1
version 2
network 192.168.50.0
network 200.1.1.0
#