前言
在点到点链路例如高级 数据链路控制（HDLC）和PPP，开放式最短路径优先（OSPF）运行作 为一个点到点的网络类型。默认情况下此网络类型被启用。 本文显示OSPF 的示例配置在一条点到点链路。检查 运行OSPF的接口的网络类型，使用 show ip ospf interface命令。
示例如何用OSPF配置点到点网络也与HDLC封装一起使用。
使用的组件
本文不限于特 定软件和硬件版本。
本文提供的信 息在特定实验室环境里从设备被创建了。用于本文的所有设 备开始了以一个缺省（默认）配置。如果在一个真实网络工 作，保证您使用它以前了解所有命令的潜在影响。
用IP地址配置
在此部分，您介绍用信 息配置通过一条点对点串行链路连接用在串行接口配置的IP 地址 运行OSPF路由协议的路由器。
注意： 找到其它信息关于用于本文的命令，使用 命令查找工具 (注册的用户)。
网络图
配置
此部分使用如下所示的配置。
router1
router1
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface Serial2
ip address 1.1.1.2 255.255.255.0
!
router ospf 1
network 1.1.1.0 0.0.0.255 area 0
!
Router2
Router2
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface Serial1/0
ip address 1.1.1.1 255.255.255.0
clockrate 2000000
!
router ospf 1
network 1.1.1.0 0.0.0.255 area 0!
用未编号的接口配置
在此部分，您介绍用信息配置通过未编号的接口连 接和运行OSPF的路由器。
注意： 找到其它信息关于用于本文的命令，使用 命令查找工具 (注册的用户)。
网络图
配置
此部分使用如下所示的配置。
router1
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface Serial0
ip unnumbered loopback 0
encapsulation ppp
!
router ospf 1
network 3.3.3.0 0.0.0.255 area 0
!
Router2
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface Serial0
ip unnumbered loopback 0
encapsulation ppp
!
router ospf 1
network 2.2.2.0 0.0.0.255 area 0
!
验证
此部分提供您能使用确认您的配置适当地工作的信息。
输出解释器工具 支持 某些show命令 (注册的 用户) ，允许您查看show命令输出分析。
验证用IP地址
下列是在Router1发出的 show ip ospf neighbor 命令的输出。
Router1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 1 FULL/ - 00:00:32 1.1.1.1 Serial 0
此输出表示， Router1有一相邻，路由器ID是2.2.2.2和形成了完全邻接与此相邻 。地址1.1.1.1是Router2 Serial0接口的IP 地址
得知更多 show ip ospf neighbor命 令，参见 什么执行 show ip ospf neighbor命 令显示？
下列是 show ip ospf interface命令的输出 在Router1。 以下 表示OSPF网络类型为接口Serial0点到点。
Router1#show ip ospf interface serial 0
Serial0 is up, line protocol is up
Internet Address 1.1.1.2/24, Area 0
Process ID 1, Router ID 3.3.3.3, Network Type POINT_TO_POINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 2.2.2.2
Suppress hello for 0 neighbor(s)
同样地，输出为 show命令在Router2如下所示。
Router2#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
3.3.3.3 1 FULL/ - 00:00:32 1.1.1.2 Serial0
Router2#show ip ospf interface serial 0
Serial0 is up, line protocol is up
Internet Address 1.1.1.1/24, Area 0
Process ID 1, Router ID 2.2.2.2, Network Type POINT_TO_POINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 3.3.3.3
Suppress hello for 0 neighbor(s)
验证与未编号的接口
show ip ospf nei ghbor 命令在Router1和Router2确认完全邻接。以下表示 OSPF网络类型为接口Serial0点到点。
得知更多 show ip ospf neighbor命 令，参见 什么执行 show ip ospf neighbor命 令显示？
Router1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 1 FULL/ - 00:00:37 2.2.2.2 Serial0
Router1#show ip ospf interface serial 0
Serial0 is up, line protocol is up
Internet Address 0.0.0.0/0, Area 0
Process ID 1, Router ID 3.3.3.3, Network Type POINT_TO_POINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:08
Index 2/2, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 2.2.2.2
Suppress hello for 0 neighbor(s)
同样地，输出为 show命令在Router2如下 所示。
Router2#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
3.3.3.3 1 FULL/ - 00:00:30 3.3.3.3 Serial0
Router2#show ip ospf interface serial 0
Serial0 is up, line protocol is up
Internet Address 0.0.0.0/0, Area 0
Process ID 1, Router ID 2.2.2.2, Network Type POINT_TO_POINT, Cost: 64
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:08
Index 2/2, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 3.3.3.3
Suppress hello for 0 neighbor(s)
