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#网络

于 2022-11-21 00:15:00 首次发布

本文详细介绍了在一个OSPF网络环境中各路由器的配置过程，包括IP地址分配、路由配置及特殊区域设置等。通过实例展示了如何建立一个高效且安全的网络环境。

1.拓扑图

要求

R4为ISP，其上只能配置IP地址;R4与其他所有直连设备间均使用公有IPR3-R5/6/7为 MGRE环境，R3为中小站点:
整个OSPF环境IP基于172.16..8/16划分;3
所有设备均可访问4的环回:

4.减少LSA的更新量，加快收敛，保障更新安全;全网可达

3.配置命令

R1配置命令

配置接口IP

[R1]interface LoopBack 0

[R1-LoopBack0]ip a 172.16.32.1 24

[R1]int g 0/0/0

[R1-GigabitEthernet0/0/0]ip ad 172.16.35.1 29

启动ospf

[R1]ospf 1 router-id 1.1.1.1

[R1-ospf-1]area 1

[R1-ospf-1-area-0.0.0.1]network 172.16.32.1 0.0.0.0

[R1-ospf-1-area-0.0.0.1]network 172.16.35.1 0.0.0.0

R2配置命令

配置接口IP

[R2]int l 0

[R2-LoopBack0]ip ad 172.16.33.1 24

[R2]int g 0/0/0

[R2-GigabitEthernet0/0/0]ip ad 172.16.35.2 29

启动OSPF

[R2]ospf 1 router-id 2.2.2.2

[R2-ospf-1]area 1

[R2-ospf-1-area-0.0.0.1]network 172.16.35.2 0.0.0.0

[R2-ospf-1-area-0.0.0.1]network 172.16.33.1 0.0.0.0

R3配置命令

配置接口IP

[R3-GigabitEthernet0/0/0]ip ad 172.16.35.3 29

[R3]int l 0

[R3-LoopBack0]ip ad 172.16.34.1 24

[R3-Serial3/0/0]ip ad 34.0.0.1 24

启动ospf

[R3]ospf 1 router-id 3.3.3.3

[R3-ospf-1]area 1

[R3-ospf-1-area-0.0.0.1]network 172.16.34.1 0.0.0.0

[R3-ospf-1-area-0.0.0.1]network 172.16.35.3 0.0.0.0

[R3-Tunnel0/0/0]ospf network-type p2mp

[R3]ospf 1 router-id 3.3.3.3

[R3-ospf-1]area 0

[R3-ospf-1-area-0.0.0.0]network 172.16.0.1 0.0.0.0

配置缺省

[R3]ip route-static 0.0.0.0 0 34.0.0.2

设置隧道

[R3]interface Tunnel 0/0/0

[R3-Tunnel0/0/0]ip ad 172.16.0.1 29

[R3-Tunnel0/0/0]tunnel-protocol gre p2mp

[R3-Tunnel0/0/0]source 34.0.0.1

[R3-Tunnel0/0/0]nhrp network-id 10

[R3-Tunnel0/0/0]nhrp entry multicast dynamic

[R3-ospf-1]default-route-advertise always

[R3]acl 2000

[R3-acl-basic-2000]rule permit source 172.16.32.0 0.0.31.255

[R3-Serial3/0/0]nat outbound 2000

R4配置命令

接口配置

[R4]int s 2/0/0

[R4-Serial2/0/0]ip ad 34.0.0.2 24

[R4]int s2/0/1

[R4-Serial2/0/1]ip ad 45.0.0.2 24

[R4]int s 3/0/0

[R4-Serial3/0/0]ip ad 46.0.0.2 24

[R4]int g 0/0/0

[R4-GigabitEthernet0/0/0]ip ad 47.0.0.2 24

[R4]int l 0

[R4-LoopBack0]ip ad 4.4.4.4 24

R5配置命令

接口配置

[R5]int s 3/0/0

[R5-Serial3/0/0]ip ad 45.0.0.1 24

[R5]interface LoopBack 0

[R5-LoopBack0]ip ad 172.16.1.1 24

配置缺省

[R5]ip route-static 0.0.0.0 0 45.0.0.2

设置隧道

[R5]int Tunnel 0/0/0

[R5-Tunnel0/0/0]ip ad 172.16.0.2 29

[R5-Tunnel0/0/0]tunnel-protocol gre p2mp

[R5-Tunnel0/0/0]source Serial 3/0/0

[R5-Tunnel0/0/0]nhrp network-id 10

[R5-Tunnel0/0/0]nhrp entry 172.16.0.1 34.0.0.1 register

[R5-Tunnel0/0/0]ospf network-type p2mp

[R5]ospf 1 router-id 5.5.5.5

[R5-ospf-1]area 0

[R5-ospf-1-area-0.0.0.0]network 172.16.0.2 0.0.0.0

[R5-ospf-1-area-0.0.0.0]network 172.16.1.1 0.0.0.0

R6配置命令

[R6]int s 3/0/0

[R6-Serial3/0/0]ip 46.0.0.1 24

[R6]int l 0

[R6-LoopBack0]ip ad 172.16.2.1 24

[R6]ip route-static 0.0.0.0 0 46.0.0.2

[R6-Tunnel0/0/0]ip ad 172.16.0.3 29

[R6-Tunnel0/0/0]tunnel-protocol gre p2mp

[R6-Tunnel0/0/0]source Serial 3/0/0

[R6-Tunnel0/0/0]nhrp network-id 10

[R6-Tunnel0/0/0]nhrp entry 172.0.0.1 34.0.0.1 register

[R6-Tunnel0/0/0]ospf network-type p2mp

[R6]ospf 1 router-id 6.6.6.6

[R6-ospf-1]area 0

[R6-ospf-1-area-0.0.0.0]network 172.16.0.3 0.0.0.0

[R6-ospf-1-area-0.0.0.0]network 172.16.2.1 0.0.0.0

[R6-GigabitEthernet0/0/0]ip address 172.16.64.1 29

[R6]ospf 1 router-id 6.6.6.6

[R6-ospf-1]area 2

[R6-ospf-1-area-0.0.0.2]network 172.16.64.1 0.0.0.0

[R6-ospf-1]default-route-advertise always

[R6]acl 2000

[R6-acl-basic-2000]rule permit source 172.16.64.0 0.0.31.255

[R6-Serial3/0/0]nat outbound 2000

R7配置命令

[R7]int g 0/0/0

[R7-GigabitEthernet0/0/0]ip ad 47.0.0.1 24

[R7]int l 0

[R7-LoopBack0]ip ad 172.16.3.1 24

配置缺省

[R7]ip route-static 0.0.0.0 0 47.0.0.2

[R7]int t 0/0/0

[R7-Tunnel0/0/0]ip ad 172.16.0.4 29

[R7-Tunnel0/0/0]tunnel-protocol gre p2mp

[R7-Tunnel0/0/0]source GigabitEthernet 0/0/0

[R7-Tunnel0/0/0]nhrp network-id 10

[R7-Tunnel0/0/0]nhrp entry 172.16.0.1 34.0.0.1 register

[R7-Tunnel0/0/0]ospf network-type p2mp

[R7]ospf 1 router-id 7.7.7.7

[R7-ospf-1]area 0

[R7-ospf-1-area-0.0.0.0]network 172.16.0.4 0.0.0.0

[R7-ospf-1-area-0.0.0.0]network 172.16.3.1 0.0.0.0

R11

[R11]int g 0/0/0

[R11-GigabitEthernet0/0/0]ip ad 172.16.64.2 29

[R11]int l 0

[R11-LoopBack0]ip ad 172.16.65.1 24

[R11]int g 0/0/1

[R11-GigabitEthernet0/0/1]ip ad 172.16.64.9 29

[R11]ospf 1 router-id 11.11.11.11

[R11-ospf-1]area 2

[R11-ospf-1-area-0.0.0.2]network 172.16.64.9 0.0.0.0

[R11-ospf-1-area-0.0.0.2]network 172.16.64.2 0.0.0.0

[R11-ospf-1-area-0.0.0.2]network 172.16.65.1 0.0.0.0

R12

[R12]int g 0/0/0

[R12-GigabitEthernet0/0/0]ip ad 172.16.64.10 29

[R12]int l 1

[R12-LoopBack1]ip ad 172.16.161 20

[R12]int l 2

[R12-LoopBack2]ip ad 172.16.176.1 20

[R12]ospf 1 router-id 12.12.12.12

[R12-ospf-1]area 2

[R12-ospf-1-area-0.0.0.2]network 172.16.64.10 0.0.0.0

[R12]rip 1

[R12-rip-1]version 2

[R12-rip-1]network 172.16.0.0

[R12-ospf-1]import-route rip 1

区域三；四配置命令同上

区域汇总

[R6-ospf-1-area-0.0.0.2]abr-summary 172.16.64.0 255.255.224.0

[R3-ospf-1-area-0.0.0.1]abr-summary 172.16.32.0 255.255.224.0

[R9-ospf-1] asbr-summary 172.16.128.0 255.255.224.0

[R12-ospf-1]asbr-summary 172.16.160.0 255.255.224.0

[R7-ospf-1-area-0.0.0.3]abr-summary 172.16.96.0 255.255.224.0

设置特殊区域

[R3-ospf-1-area-0.0.0.1]stub no-summary

[R2-ospf-1-area-0.0.0.1]stub

[R1-ospf-1-area-0.0.0.1]stub

[R6-ospf-1-area-0.0.0.2]nssa no-import-route

[R11-ospf-1-area-0.0.0.2]nssa

[R12-ospf-1-area-0.0.0.2]nssa

[R9-ospf-1-area-0.0.0.3]nssa

[R8-ospf-1-area-0.0.0.3]nssa

[R7-ospf-1-area-0.0.0.3]nssa no-summary

4.实现