实验二十四、OSPF 在NBMA 环境中点到点的配置

实验二十四、OSPF 在NBMA 环境中点到点的配置
一、 实验目的
1. 掌握NBMA 环境中点到点的配置
2. 理解NBMA 环境中点到点网络类型的意义
二、 应用环境
在帧中继的网络中，OSPF 的路由更新不能正常进行，需要配置点到点的网络类型保证OSPF
协议的正常运行
三、 实验设备
1. DCR-1751 两台
2. CR-V35MT 一条
3. CR-V35FC 一条
四、 实验拓扑



五、 实验要求
配置表
ROUTER-A ROUTER-B
S1/1 （DCE ） 192.168.1.1/24 S1/0 (DTE) 192.168.1.2/24
F0/0 192.168.0.1 F0/0 192.169.2.1/24
在路由器的之间的接口封装帧中继。
六、 实验步骤
第一步：参照实验14，配置帧中继，并测试连通性
第二步：配置OSPF 协议
Router-A#conf Router-A_config#router ospf 2
Router-A_config_ospf_2#net 192.168.0.0 255.255.255.0 area 0
Router-A_config_ospf_2#net 192.168.1.0 255.255.255.0 area 0
Router-B#conf
Router-B_config#router ospf 10
Router-B_config_ospf_10#net 192.168.1.0 255.255.255.0 area 0
Router-B_config_ospf_10#net 192.168.2.0 255.255.255.0 area 0
第三步：查看路由表
Router-A#sh ip route
Codes: C - connected, S - static, R - RIP, B - BGP, BC - BGP connected
D - DEIGRP, DEX - external DEIGRP, O - OSPF, OIA - OSPF inter area
ON1 - OSPF NSSA external type 1, ON2 - OSPF NSSA external type 2
OE1 - OSPF external type 1, OE2 - OSPF external type 2
DHCP - DHCP type
VRF ID: 0
C 192.168.0.0/24 is directly connected, FastEthernet0/0
C 192.168.1.0/24 is directly connected, Serial1/1
Router-B#sh ip route
Codes: C - connected, S - static, R - RIP, B - BGP, BC - BGP connected
D - DEIGRP, DEX - external DEIGRP, O - OSPF, OIA - OSPF inter area
ON1 - OSPF NSSA external type 1, ON2 - OSPF NSSA external type 2
OE1 - OSPF external type 1, OE2 - OSPF external type 2
DHCP - DHCP type
VRF ID: 0
C 192.168.1.0/24 is directly connected, Serial1/0
C 192.168.2.0/24 is directly connected, FastEthernet0/0
！都没有得到OSPF 路由
第四步：修改网络类型
Router-A#conf
Router-A_config#int s1/1
Router-A_config_s1/1#ip ospf net point-to-point ！配置网络类型为点到点
Router-B#conf
Router-B_config#int s1/0
Router-B_config_s1/0#ip ospf net point-to-point ！配置网络类型为点到点第五步：再次查看路由表
Router-A#sh ip route
Codes: C - connected, S - static, R - RIP, B - BGP, BC - BGP connected
D - DEIGRP, DEX - external DEIGRP, O - OSPF, OIA - OSPF inter area
ON1 - OSPF NSSA external type 1, ON2 - OSPF NSSA external type 2
OE1 - OSPF external type 1, OE2 - OSPF external type 2
DHCP - DHCP type
VRF ID: 0
C 192.168.0.0/24 is directly connected, FastEthernet0/0
C 192.168.1.0/24 is directly connected, Serial1/1
O 192.168.2.0/24 [110,1601] via 192.168.1.2(on Serial1/1)
Router-B#sh ip route
Codes: C - connected, S - static, R - RIP, B - BGP, BC - BGP connected
D - DEIGRP, DEX - external DEIGRP, O - OSPF, OIA - OSPF inter area
ON1 - OSPF NSSA external type 1, ON2 - OSPF NSSA external type 2
OE1 - OSPF external type 1, OE2 - OSPF external type 2
DHCP - DHCP type
VRF ID: 0
O 192.168.0.0/24 [110,1601] via 192.168.1.1(on Serial1/0)
C 192.168.1.0/24 is directly connected, Serial1/0
C 192.168.2.0/24 is directly connected, FastEthernet0/0
第六步：查看OSPF 网络类型
Router-A#sh ip ospf interface
FastEthernet0/0 is up, line protocol is up
Internet Address: 192.168.0.1/24
Nettype: Broadcast
OSPF process is 2, AREA: 0, Router ID: 192.168.1.1
Cost: 1, Transmit Delay is 1 sec, Priority 1
Hello interval is 10, Dead timer is 40, Retransmit is 5
OSPF INTF State is IDr
Designated Router ID: 192.168.1.1, Interface address 192.168.0.1
Neighbor Count is 0, Adjacent neighbor count is 0
Serial1/1 is up, line protocol is up
Internet Address: 192.168.1.1/24
Nettype: Point-to-Point
OSPF process is 2, AREA: 0, Router ID: 192.168.1.1
Cost: 1600, Transmit Delay is 1 sec, Priority 1 Hello interval is 10, Dead timer is 40, Retransmit is 5
OSPF INTF State is IPOINT_TO_POINT
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 192.168.1.2
Router-A#sh ip ospf neighbor
----------------------------------------------------------------------------
OSPF process: 2
AREA: 0
Neighbor ID Pri State DeadTime Neighbor Addr Interface
192.168.2.1 1 FULL/- 31 192.168.1.2 Serial1/1
！注意到没有DR 的选举过程