实验拓扑
实验目的
总部有三个路由器分别是AR1,AR2,AR3,区域为0
分部1和分部2分别是AR4和AR5,且分别有两根专线到总部的区域0,从而造成等价路由链路备份;
AR1引入感兴趣的直连路由并作汇总;
分部1的路由器性能较差,为了减小LSA条目,配置为totally NSSA区域;
分部1配置为NSSA区域后又引入了外部路由,从而变成NSSA区域的ASBR;
为保证安全不受非法***致使ospf网络震荡,区域启动认证。
AR1宣告默认路由,使ospf的IP段能访问外网。node
AR1配置安全
acl 2100 rule 5 permit source 11.11.8.0 0.0.7.255 //用于路由策略 acl 3001 rule 10 permit ip source 10.0.0.0 0.0.255.255 //用于nat ip route-static 0.0.0.0 0.0.0.0 202.100.1.2 默认路由指向ISP interface GigabitEthernet0/0/2 ip address 202.100.1.1 255.255.255.252 nat outbound 3001 //easy nat route-policy import_die permit node 10 if-match acl 2100 //用于引入的感兴趣IP ospf 1 router-id 10.0.0.1 asbr-summary 11.11.8.0 255.255.248.0 //对外部路由汇总 default-route-advertise //整个ospf宣告默认路由,使其全部默认 import-route direct route-policy import_die area 0.0.0.0 authentication-mode simple 123 network 10.0.0.1 0.0.0.0 network 10.0.12.0 0.0.0.3 network 10.0.13.0 0.0.0.7
AR2配置网络
ospf 1 router-id 10.0.0.2 area 0.0.0.0 authentication-mode simple 123 network 10.0.0.2 0.0.0.0 network 10.0.12.0 0.0.0.7 network 10.0.23.0 0.0.0.7 area 0.0.0.1 abr-summary 172.16.0.0 255.255.252.0 authentication-mode simple 123 network 10.0.24.0 0.0.0.7 nssa no-summary area 0.0.0.2 authentication-mode simple 123 network 10.0.25.0 0.0.0.7
AR3配置ide
ospf 1 router-id 10.0.0.3 area 0.0.0.0 authentication-mode simple 123 network 10.0.0.3 0.0.0.0 network 10.0.13.0 0.0.0.7 network 10.0.23.0 0.0.0.7 area 0.0.0.1 abr-summary 172.16.0.0 255.255.252.0 //ABR汇总 authentication-mode simple 123 network 10.0.34.0 0.0.0.7 nssa no-summary //配置totally NSSA area 0.0.0.2 authentication-mode simple 123 network 10.0.35.0 0.0.0.7
AR4配置性能
ospf 1 router-id 10.0.0.4 import-route direct area 0.0.0.1 authentication-mode simple 123 network 10.0.0.4 0.0.0.0 network 10.0.0.32 0.0.0.7 network 10.0.24.0 0.0.0.7
AR5配置code
ospf 1 router-id 10.0.0.5 area 0.0.0.2 authentication-mode simple 123 network 10.0.0.5 0.0.0.0 network 10.0.25.0 0.0.0.7
经过display ospf 1 routing 能够查看ospf的路由条目
dis ip routing-table protocol ospf 查看转发的ospf路由条目router