OSPF多区域配置和OSPF认证应用

OSPF认证
      ospf认证解决安全隐患，只要经过认证的ospf路由器才能正常创建邻居关系、交互信息

            认证模式：不认证null（默认）；明文simple认证；MD5认证
            OSPF的认证方式
        ** 接口认证**
             [R1-GigabitEthernet0/0/2]ospf authentication-mode simple cipher 123
             //进入配置进程的接口配置认证方式为明文 密码123
                cipher加密仅表示在查看命令时加密显示，而报文在传输过程当中密码是明文显示。
            [R1-GigabitEthernet0/0/2] ospf authentication-mode md5 1 cipher 123         // MD5认证，1为key id，密码为123，cipher表示报文在传输过程当中经过MD5算法加密      
        **区域认证**
            Ospf 
            area 0 
            authentication-mode simple cipher 123 
            明文认证，密码为123， cipher加密仅表示在查看命令时加密显示，而报文在传输过程当中密码是明文显示。
            authentication-mode md5 1 cipher 123  
            MD5认证，1为key id，密码为123，cipher表示报文在传输过程当中经过MD5算法加密

            注意：当simple和MD5都存在时，优先使用接口认证方式
            两台设备之间 要么两端都不配置认证 要么两端都都配置simple认证 要么两端都都配置md5认证

本实验area1区域认证方式为接口认证
area0认证方式为区域md5认证
area2没有配置认证方式

配置步骤
    [R1]interface GigabitEthernet0/0/0
         ip address 10.10.1.1 255.255.255.0 
         ospf authentication-mode simple cipher 123
         interface GigabitEthernet0/0/1
         ip address 192.168.1.254 255.255.255.0 
         interface LoopBack0
         ip address 1.1.1.1 255.255.255.255 

     ospf 1 //默认id为1
         area 0.0.0.1 
         network 1.1.1.1 0.0.0.0 
         network 10.10.1.1 0.0.0.0 
         network 192.168.1.254 0.0.0.0 
   [R2]interface GigabitEthernet0/0/0
        ip address 10.11.1.1 255.255.255.0 
        interface GigabitEthernet0/0/1
        ip address 10.10.1.2 255.255.255.0 
        ospf authentication-mode simple cipher 123
        interface GigabitEthernet0/0/2
        interface LoopBack0
        ip address 2.2.2.2 255.255.255.255 
        interface LoopBack1
        ip address 6.6.6.6 255.255.255.255 
   ospf 1 
        area 0.0.0.0 
        authentication-mode md5 1 cipher 123
        network 2.2.2.2 0.0.0.0 
        network 10.11.1.1 0.0.0.0 
        area 0.0.0.1 
        network 6.6.6.6 0.0.0.0 
        network 10.10.1.2 0.0.0.0 

        [R5]interface GigabitEthernet0/0/0
         ip address 10.11.1.2 255.255.255.0 
         interface GigabitEthernet0/0/2
         ip address 10.13.1.1 255.255.255.0 
         interface LoopBack0
         ip address 3.3.3.3 255.255.255.255 
    ospf 1 
        area 0.0.0.0 
        authentication-mode md5 1 cipher 123
        network 3.3.3.3 0.0.0.0 
        network 10.11.1.2 0.0.0.0 
        network 10.13.1.1 0.0.0.0 
    [R3]interface GigabitEthernet0/0/1
        ip address 10.12.1.1 255.255.255.0 
         interface GigabitEthernet0/0/2
        ip address 10.13.1.2 255.255.255.0 
        interface LoopBack0
        ip address 4.4.4.4 255.255.255.0 
        interface LoopBack1
         ip address 7.7.7.7 255.255.255.255 
    ospf 1 
        area 0.0.0.0 
        authentication-mode md5 1 cipher 123
        network 7.7.7.7 0.0.0.0 
        network 10.13.1.2 0.0.0.0 
        area 0.0.0.2 
        network 4.4.4.4 0.0.0.0 
        network 10.12.1.1 0.0.0.0 
  [R4]interface GigabitEthernet0/0/0
        ip address 192.168.2.254 255.255.255.0 
        interface GigabitEthernet0/0/1
        ip address 10.12.1.2 255.255.255.0 
        interface GigabitEthernet0/0/2
        interface LoopBack0
        ip address 5.5.5.5 255.255.255.0 
   ospf 1 
       area 0.0.0.2 
       network 5.5.5.5 0.0.0.0 
       network 10.12.1.2 0.0.0.0 
       network 192.168.2.254 0.0.0.0 
    测试验证