配置OSPF的DR及BDR的选取过程

 

组网需求：局域网内，路由器R1为DR，R2为BDR，R3不参与选举。

配置思路：路由器R1的接口优先级配置为100，R2的接口优先级配置为80，R3的接口优先级配置为0。注（ospf选举DR接口优先级越大越优先）

拓扑图：

 

设备配置：

点击查看代码

| R1配置信息                               | R2配置信息                               | R3配置信息                               | R4配置信息                               |
| ------------------------------------ | ------------------------------------ | ------------------------------------ | ------------------------------------ |
| #                                    | #                                    | #                                    | #                                    |
| sysname R1                           | sysname R2                           | sysname R3                           | sysname R4                           |
| #                                    | #                                    | #                                    | #                                    |
| undo info-center enable              | undo info-center enable              | undo info-center enable              | undo info-center enable              |
| #                                    | #                                    | #                                    | #                                    |
| interface GigabitEthernet4/0/0       | interface GigabitEthernet4/0/1       | interface GigabitEthernet4/0/2       | interface GigabitEthernet4/0/3       |
| ip address 10.10.10.10 255.255.255.0 | ip address 10.10.10.20 255.255.255.0 | ip address 10.10.10.30 255.255.255.0 | ip address 10.10.10.40 255.255.255.0 |
| ospf dr-priority 100                 | ospf dr-priority 80                  | ospf dr-priority 0                   | #                                    |
| #                                    | #                                    | #                                    | ospf 1 router-id 4.4.4.4             |
| ospf 1 router-id 1.1.1.1             | ospf 1 router-id 2.2.2.2             | ospf 1 router-id 3.3.3.3             | area 0.0.0.0                         |
| area 0.0.0.0                         | area 0.0.0.0                         | area 0.0.0.0                         | network 10.10.10.0 0.0.0.255         |
| network 10.10.10.0 0.0.0.255         | network 10.10.10.0 0.0.0.255         | network 10.10.10.0 0.0.0.255         | #                                    |
| #                                    | #                                    | #                                    |                                      |

未配置接口优先级邻居状态：

配置接口优先级邻居状态：