配置点到点链路OSPF及认证(2)
2、基本调试RA#sh ip route ospf ------查看通过OSPF学习到的路由
2.0.0.0/24 is subnetted, 1 subnets
O 2.2.2.0 via 10.0.0.2, 00:00:14, Serial1/0
3.0.0.0/24 is subnetted, 1 subnets
O 3.3.3.0 via 12.0.0.2, 00:00:14, Serial1/2
11.0.0.0/24 is subnetted, 1 subnets
O 11.0.0.0 via 12.0.0.2, 00:00:14, Serial1/2
via 10.0.0.2, 00:00:14, Serial1/0
RA#sh ip protocols -----查看路由
Routing Protocol is "ospf 1" ------启用了OSPF，进程号为1
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 1.1.1.1 ------路由器ID
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks: -----路由的网络
1.1.1.0 0.0.0.255 area 0
10.0.0.0 0.0.0.255 area 0
12.0.0.0 0.0.0.255 area 0
Reference bandwidth unit is 100 mbps ----路由花费参考带宽为100M
Routing Information Sources: ----邻居路由器
Gateway Distance Last Update
3.3.3.3 110 00:01:14
2.2.2.2 110 00:01:14
Distance: (default is 110)
RA#sh ip ospf interface s1/2 -----查看接口
Serial1/2 is up, line protocol is up
Internet Address 12.0.0.1/24, Area 0
Process ID 1, Router ID 1.1.1.1, 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/dead时间间隔
…………
Suppress hello for 0 neighbor(s)
RA#sh ip ospf nei -----查看邻居
Neighbor ID Pri State Dead Time Address Interface
3.3.3.3 0 FULL/- 00:00:37 12.0.0.2 Serial1/2
2.2.2.2 0 FULL/- 00:00:39 10.0.0.2 Serial1/0
从以上可见，在点对点环境下，没有DR/BDR选举，邻居关系自动建立。
RA#sh ip ospf database -----查看LSDB，三张表的LSDB是一样的
OSPF Router with ID (1.1.1.1) (Process ID 1)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 325 0x80000005 0x00E5BD 5
2.2.2.2 2.2.2.2 223 0x80000006 0x002F6D 5
3.3.3.3 3.3.3.3 202 0x80000005 0x00C1CF 5
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