「实验分享」OSPF单区域配置：实验环境准备（五）

图 OSPF单域配置实验拓扑图

OSPF缺省路由发布及验证

在R1上配置缺省路由并发布到OSPF域内。

配置R1

interface LoopBack1

ip address 10.10.10.10 255.255.255.0

[R1]ip route-static 0.0.0.0 0.0.0.0 LoopBack 1

[R1]ospf 1

[R1-ospf-1]default-route-advertise

查看R2和R3的路由表。可以看到，R2和R3均已经学习到了R1发布的缺省路由。

[R2]display ip routing-table

Route Flags: R - relay, D - download to fib

---

Routing Tables: Public

Destinations : 20 Routes : 21

Destination/Mask Proto Pre Cost Flags NextHop Interface

0.0.0.0/0 O_ASE 150 1 D 10.1.12.1 GigabitEthernet0/0/1

[R3]display ip routing-table

Route Flags: R - relay, D - download to fib

---

Routing Tables: Public

Destinations : 20 Routes : 21

Destination/Mask Proto Pre Cost Flags NextHop Interface

0.0.0.0/0 O_ASE 150 1 D 10.1.13.1 GigabitEthernet0/0/1

使用ping命令，检测R2和R3与10.10.10.10/24网段之间的连通性，验证默认路由的有效性。

[R2]ping 10.10.10.10

PING 10.10.10.10: 56 data bytes, press CTRL_C to break

Reply from 10.10.10.10: bytes=56 Sequence=1 ttl=255 time=50 ms

Reply from 10.10.10.10: bytes=56 Sequence=2 ttl=255 time=20 ms

Reply from 10.10.10.10: bytes=56 Sequence=3 ttl=255 time=30 ms

Reply from 10.10.10.10: bytes=56 Sequence=4 ttl=255 time=20 ms

Reply from 10.10.10.10: bytes=56 Sequence=5 ttl=255 time=30 ms

[R3]ping 10.10.10.10

PING 10.10.10.10: 56 data bytes, press CTRL_C to break

Reply from 10.10.10.10: bytes=56 Sequence=1 ttl=255 time=50 ms

Reply from 10.10.10.10: bytes=56 Sequence=2 ttl=255 time=20 ms

Reply from 10.10.10.10: bytes=56 Sequence=3 ttl=255 time=30 ms

Reply from 10.10.10.10: bytes=56 Sequence=4 ttl=255 time=30 ms

Reply from 10.10.10.10: bytes=56 Sequence=5 ttl=255 time=40 ms