MGRE环境下运行OSPF-优快云博客

本文链接：https://blog.youkuaiyun.com/m0_74281884/article/details/137717421

一、分析要求

自行定义公网网段和私有网段，ISP设备仅配置IP地址
R1/R4/R5构建Full-Mesh结构
R1/R2/R3构建Hub-Spoke结构，R1为NHS
除ISP设备，其余路由器运行OSPF

二、实施过程

1. 配置IP及环回地址

[R1]int g 0/0/0
[R1-GigabitEthernet0/0/0]ip add 20.0.0.1 24
[R1-GigabitEthernet0/0/0]int g 0/0/1
[R1-GigabitEthernet0/0/1]ip add 21.0.0.1 24
[R1-GigabitEthernet0/0/1]int l 0
[R1-LoopBack0]ip add 192.168.1.1 24

[R2]int g 0/0/0
[R2-GigabitEthernet0/0/0]ip add 12.0.0.1 24
[R2-GigabitEthernet0/0/0]int l 0
[R2-LoopBack0]ip add 192.168.2.1 24

[R3]int g 0/0/0
[R3-GigabitEthernet0/0/0]ip add 13.0.0.1 24
[R3-GigabitEthernet0/0/0]int l 0
[R3-LoopBack0]ip add 192.168.3.1 24

[R4]int g 0/0/0
[R4-GigabitEthernet0/0/0]ip add 14.0.0.1 24
[R4-GigabitEthernet0/0/0]int l 0
[R4-LoopBack0]ip add 192.168.4.1 24

[R5]int g 0/0/0
[R5-GigabitEthernet0/0/0]ip add 15.0.0.1 24
[R5-GigabitEthernet0/0/0]int l 0
[R5-LoopBack0]ip add 192.168.5.1 24

[R6]int g 0/0/0
[R6-GigabitEthernet0/0/0]ip add 20.0.0.2 24
[R6-GigabitEthernet0/0/0]int g 0/0/1
[R6-GigabitEthernet0/0/1]ip add 21.0.0.2 24
[R6-GigabitEthernet0/0/1]int g 2/0/0
[R6-GigabitEthernet2/0/0]ip add 12.0.0.2 24
[R6-GigabitEthernet2/0/0]int g 3/0/0
[R6-GigabitEthernet3/0/0]ip add 13.0.0.2 24
[R6-GigabitEthernet3/0/0]int g 4/0/0
[R6-GigabitEthernet4/0/0]ip add 14.0.0.2 24
[R6-GigabitEthernet4/0/0]int g 0/0/2
[R6-GigabitEthernet0/0/2]ip add 15.0.0.2 24

测试

2. 搭建Hub-Spoke结构

R1为中心站点，R2、R3为分支
隧道接口网段定义为192.168.10.0/24

中心R1配置

[R1]int t 0/0/0  //创建隧道接口
[R1-Tunnel0/0/0]ip add 192.168.10.1 24  //配置接口IP
[R1-Tunnel0/0/0]tunnel-protocol gre p2mp  //定义封装方式P2MP
[R1-Tunnel0/0/0]source 20.0.0.1  //定义封装内容，该IP不可变
[R1-Tunnel0/0/0]nhrp network-id 100  //创建域，id为100

分支R2配置

[R2]int t 0/0/0
[R2-Tunnel0/0/0]ip add 192.168.10.2 24
[R2-Tunnel0/0/0]tunnel-protocol gre p2mp 	
[R2-Tunnel0/0/0]source GigabitEthernet 0/0/0  //使用出接口，因为IP地址可变
[R2-Tunnel0/0/0]nhrp network-id 100  //加入域
[R2-Tunnel0/0/0]nhrp entry 192.168.10.1 20.0.0.1 register   //向中心注册

分支R3配置

[R3]int t 0/0/0
[R3-Tunnel0/0/0]ip add 192.168.10.3 24
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp 
[R3-Tunnel0/0/0]source GigabitEthernet 0/0/0
[R3-Tunnel0/0/0]nhrp network-id 100	
[R3-Tunnel0/0/0]nhrp entry 192.168.10.1 20.0.0.1 register

添加缺省路由，确保公网畅通

[R1]ip route-static 0.0.0.0 0 20.0.0.2 
[R2]ip route-static 0.0.0.0 0 12.0.0.2
[R3]ip route-static 0.0.0.0 0 13.0.0.2

开启伪广播

[R1-Tunnel0/0/0]nhrp entry multicast dynamic

`更改接口类``型为P2MP`

[R1-Tunnel0/0/0]ospf network-type p2mp 
[R2-Tunnel0/0/0]ospf network-type p2mp
[R3-Tunnel0/0/0]ospf network-type p2mp

查看R1 ospf 邻居表

3. 搭建Full-Mesh结构

R1、R4、R5搭建

R1配置
[R1]int t 0/0/1
[R1-Tunnel0/0/1]ip add 192.168.15.1 24	
[R1-Tunnel0/0/1]tunnel-protocol gre p2mp 
[R1-Tunnel0/0/1]source 21.0.0.1
[R1-Tunnel0/0/1]nhrp network-id 110

R4配置
[R4]int t 0/0/1
[R4-Tunnel0/0/1]ip add 192.168.15.4 24
[R4-Tunnel0/0/1]tunnel-protocol gre p2mp 
[R4-Tunnel0/0/1]source 14.0.0.1  //full-mesh中接口ip不可变，分支也可以直接配ip
[R4-Tunnel0/0/1]nhrp network-id 110
[R4-Tunnel0/0/1]nhrp entry 192.168.15.1 21.0.0.1 register 
[R4-Tunnel0/0/1]nhrp entry 192.168.15.5 15.0.0.1 register //向其他所有设备注册

R5配置
[R5]int t 0/0/1
[R5-Tunnel0/0/1]ip add 192.168.15.5 24
[R5-Tunnel0/0/1]tunnel-protocol gre p2mp 
[R5-Tunnel0/0/1]source 15.0.0.1 
[R5-Tunnel0/0/1]nhrp network-id 110
[R5-Tunnel0/0/1]nhrp entry 192.168.15.1 21.0.0.1 register

添加缺省路由，确保公网畅通

[R1]ip route-static 0.0.0.0 0 21.0.0.2
[R4]ip route-static 0.0.0.0 0 14.0.0.2
[R5]ip route-static 0.0.0.0 0 15.0.0.2

`开启伪广播`

[R1-Tunnel0/0/1]nhrp entry multicast dynamic 
[R4-Tunnel0/0/1]nhrp entry multicast dynamic 
[R5-Tunnel0/0/1]nhrp entry multicast dynamic

`更改接口类型`

[R1-Tunnel0/0/1]ospf network-type broadcast 
[R4-Tunnel0/0/1]ospf network-type broadcast 
[R5-Tunnel0/0/1]ospf network-type broadcast

查看R1 ospf 邻居表

4. 运行OSPF协议

宣告私网网段和隧道网段

[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]a 0
[R1-ospf-1-area-0.0.0.0]network 192.168.1.1 0.0.0.0
[R1-ospf-1-area-0.0.0.0]network 192.168.10.0 0.0.0.255
[R1-ospf-1-area-0.0.0.0]network 192.168.15.0 0.0.0.255

[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]a 0	
[R2-ospf-1-area-0.0.0.0]network 192.168.2.1 0.0.0.0
[R2-ospf-1-area-0.0.0.0]network 192.168.10.0 0.0.0.255

[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]a 0
[R3-ospf-1-area-0.0.0.0]network 192.168.3.1 0.0.0.0
[R3-ospf-1-area-0.0.0.0]network 192.168.10.0 0.0.0.255

[R4]ospf 1 router-id 4.4.4.4
[R4-ospf-1]a 0
[R4-ospf-1-area-0.0.0.0]network 192.168.4.1 0.0.0.0
[R4-ospf-1-area-0.0.0.0]network 192.168.15.0 0.0.0.255

[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]a 0
[R5-ospf-1-area-0.0.0.0]network 192.168.5.1 0.0.0.0
[R5-ospf-1-area-0.0.0.0]network 192.168.15.0 0.0.0.255