OSPF单区域配置
实验环境：华为模拟器eNSP
现在有这样一个拓扑图：
我想要让R1可以ping通R3,显然目前是不行的：
<R1>ping 192.168.2.2
PING 192.168.2.2: 56 data bytes, press CTRL_C to break
Request time out
Request time out
Request time out
Request time out
Request time out
--- 192.168.2.2 ping statistics ---
5 packet(s) transmitted
0 packet(s) received
100.00% packet loss
查看一下路由器R1的路由表：
<R1>dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 4 Routes : 4
Destination/Mask Proto Pre Cost Flags NextHop Interface
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
192.168.1.0/24 Direct 0 0 D 192.168.1.1 Ethernet0/0/0
192.168.1.1/32 Direct 0 0 D 127.0.0.1 Ethernet0/0/0
发现只有自己的IP地址，说明ping不通是正常的，现在我们来配置OSPF来让R1可以ping通R3。
<R1>sy
[R1]ospf //启用ospf进程
[R1-ospf-1]area 0 //区域号
[R1-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255 //宣告路由
<R2>sy
[R2]ospf
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255
[R2-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255
<R3>sy
[R3]ospf
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255
这样就配好了，去R1上查看一下路由表：
<R1>dis ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 5 Routes : 5
Destination/Mask Proto Pre Cost Flags NextHop Interface
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
192.168.1.0/24 Direct 0 0 D 192.168.1.1 Ethernet0/0/0
192.168.1.1/32 Direct 0 0 D 127.0.0.1 Ethernet0/0/0
192.168.2.0/24 OSPF 10 2 D 192.168.1.2 Ethernet0/0/0
可以看到已经通过OSPF学到了路由器R3的路由，再来ping一下R3试试：
<R1>ping 192.168.2.2
PING 192.168.2.2: 56 data bytes, press CTRL_C to break
Reply from 192.168.2.2: bytes=56 Sequence=1 ttl=254 time=60 ms
Reply from 192.168.2.2: bytes=56 Sequence=2 ttl=254 time=30 ms
Reply from 192.168.2.2: bytes=56 Sequence=3 ttl=254 time=80 ms
Reply from 192.168.2.2: bytes=56 Sequence=4 ttl=254 time=60 ms
Reply from 192.168.2.2: bytes=56 Sequence=5 ttl=254 time=50 ms
--- 192.168.2.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 30/56/80 ms
可以看到，已经能ping通了，说明配置没有问题。
再来看一下OSPF状态信息：
<R1>dis ospf peer brief
OSPF Process 1 with Router ID 192.168.1.1
Peer Statistic Information
----------------------------------------------------------------------------
Area Id Interface Neighbor id State
0.0.0.0 Ethernet0/0/0 192.168.1.2 Full
----------------------------------------------------------------------------
