OSPF网络配置与MGRE搭建实战-优快云博客

本文链接：https://blog.youkuaiyun.com/M_ogul_/article/details/131961429

本文详细介绍了在OSPF环境下搭建MGRE（多点到多点GRE隧道）的过程，包括地址规划、IP配置、缺路由设置、NAT配置、星型和全网状MGRE结构的建立，以及OSPF接口工作方式调整，最终实现全网可达的网络环境。通过这些步骤，读者可以学习到如何在路由器上进行复杂网络配置。

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实验步骤

一、地址规划

PC地址
设备   地址   网关
PC1   192.168.1.2/24   192.168.1.1/24
PC2   192.168.2.2/24   192.168.2.1/24
PC3   192.168.3.2/24   192.168.3.1/24
PC4   192.168.4.2/24   192.168.4.1/24
PC5   192.168.5.2/24   192.168.5.1/24

设备地址
设备   接口   地址
R1   G0/0/1   14.1.1.1/24
G0/0/2   41.1.1.2/24
R2   G0/0/2   24.1.1.1/24
R3   G0/0/2   34.1.1.1/24
R5   G0/0/2   54.1.1.1/24
R6   G0/0/2   64.1.1.1/24
R4   G0/0/0   41.1.1.2/24
G2/0/0   14.1.1.2/24
G0/0/1   24.1.1.2/24
G0/0/2   34.1.1.2/24
G3/0/0   54.1.1.2/24
G4/0/0   64.1.1.2/24
loopback0   5.5.5.5/24

二、配置IP地址

R1配置
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip add 192.168.1.1 24
[R1-GigabitEthernet0/0/0]int g0/0/1
[R1-GigabitEthernet0/0/1]ip add 14.1.1.1 24
[R1-GigabitEthernet0/0/1]int g0/0/2
[R1-GigabitEthernet0/0/2]ip add 41.1.1.1 24
R2配置
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip add 192.168.2.1 24
[R2-GigabitEthernet0/0/0]int g0/0/2
[R2-GigabitEthernet0/0/2]ip add 24.1.1.1 24
R3配置
[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]ip add 192.168.3.1 24
[R3-GigabitEthernet0/0/0]int g0/0/2
[R3-GigabitEthernet0/0/2]ip add 34.1.1.1 24
R5配置
[R5]int g0/0/0
[R5-GigabitEthernet0/0/0]ip add 192.168.4.1 24
[R5-GigabitEthernet0/0/0]int g0/0/2
[R5-GigabitEthernet0/0/2]ip add 54.1.1.1 24
R6配置
[R6]int g0/0/0
[R6-GigabitEthernet0/0/0]ip add 192.168.5.1 24
[R6-GigabitEthernet0/0/0]int g0/0/2
[R6-GigabitEthernet0/0/2]ip add 64.1.1.1 24
R4配置
[R4]int g0/0/0
[R4-GigabitEthernet0/0/0]ip add 41.1.1.2 24
[R4-GigabitEthernet0/0/0]int g2/0/0
[R4-GigabitEthernet2/0/0]ip add 14.1.1.2 24
[R4-GigabitEthernet2/0/0]int g0/0/1
[R4-GigabitEthernet0/0/1]IP ADD 24.1.1.2 24
[R4-GigabitEthernet0/0/1]int g0/0/2
[R4-GigabitEthernet0/0/2]ip add 34.1.1.2 24
[R4-GigabitEthernet0/0/2]int g3/0/0
[R4-GigabitEthernet3/0/0]ip add 54.1.1.2 24
[R4-GigabitEthernet3/0/0]int g4/0/0
[R4-GigabitEthernet4/0/0]ip add 64.1.1.2 24
[R4-GigabitEthernet4/0/0]int l0
[R4-LoopBack0]ip add 5.5.5.5 24
[R4-LoopBack0]q

三、配置缺路由

[R1]ip route-static 0.0.0.0 0 14.1.1.2
[R1]ip route-static 0.0.0.0 0 41.1.1.2
[R2]ip route-static 0.0.0.0 0 23.1.1.2
[R3]ip route-static 0.0.0.0 0 34.1.1.2
[R5]ip route-static 0.0.0.0 0 54.1.1.2
[R6]ip route-static 0.0.0.0 0 64.1.1.2

四、NAT

[R1]acl 2000
[R1-acl-basic-2000]rule 1 permit source any
[R1-acl-basic-2000]q
[R1]int g0/0/1
[R1-GigabitEthernet0/0/1]nat outbound 2000
[R1-GigabitEthernet0/0/1]int g0/0/2
[R1-GigabitEthernet0/0/2]nat outbound 2000

[R2]acl 2000
[R2-acl-basic-2000]rule 1 permit source any
[R2-acl-basic-2000]q
[R2]int g0/0/2
[R2-GigabitEthernet0/0/2]nat outbound 2000

[R3]acl 2000
[R3-acl-basic-2000]rule 1 permit source any
[R3-acl-basic-2000]q
[R3]int g0/0/2
[R3-GigabitEthernet0/0/2]nat outbound 2000

[R5]acl 2000
[R5-acl-basic-2000]rule 1 permit source any
[R5-acl-basic-2000]q
[R5]int g0/0/2
[R5-GigabitEthernet0/0/2]nat outbound 2000

[R6]acl 2000
[R6-acl-basic-2000]rule 1 permit source any
[R6-acl-basic-2000]q
[R6]int g0/0/2
[R6-GigabitEthernet0/0/2]nat outbound 2000

五、R1-2-3搭建星型结构的MGRE

R1配置（中心站点）
[R1]int Tunnel 0/0/0
[R1-Tunnel0/0/0]ip add 10.1.1.1 24
[R1-Tunnel0/0/0]tunnel-protocol gre p2mp
[R1-Tunnel0/0/0]source 14.1.1.1
[R1-Tunnel0/0/0]nhrp network-id 100
[R1-Tunnel0/0/0]nhrp entry multicast dynamic # 开启伪广播
R2配置
[R2]int Tunnel 0/0/0
[R2-Tunnel0/0/0]ip add 10.1.1.2 24
[R2-Tunnel0/0/0]tunnel-protocol gre p2mp
[R2-Tunnel0/0/0]source g0/0/2
[R2-Tunnel0/0/0]nhrp entry 10.1.1.1 14.1.1.1 register
[R2-Tunnel0/0/0]nhrp network-id 100
R3配置
[R3]int Tunnel 0/0/0
[R3-Tunnel0/0/0]ip add 10.1.1.3 24
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp
[R3-Tunnel0/0/0]source g0/0/2
[R3-Tunnel0/0/0]nhrp entry 10.1.1.1 14.1.1.1 register
[R3-Tunnel0/0/0]nhrp network-id 100

六、R1-5-6全连网状MGRE

R1配置
[R1]int Tunnel 0/0/1
[R1-Tunnel0/0/1]ip add 10.1.2.1 24
[R1-Tunnel0/0/1]tunnel-protocol gre p2mp
[R1-Tunnel0/0/1]source 41.1.1.1
[R1-Tunnel0/0/1]nhrp entry multicast dynamic
[R1-Tunnel0/0/1]nhrp network-id 101
[R1-Tunnel0/0/1]nhrp entry 10.1.2.2 54.1.1.1 register
[R1-Tunnel0/0/1]nhrp entry 10.1.2.3 64.1.1.1 register
R5配置
[R5]int t0/0/1
[R5-Tunnel0/0/1]ip add 10.1.2.2 24
[R5-Tunnel0/0/1]tunnel-protocol gre p2mp
[R5-Tunnel0/0/1]source 54.1.1.1
[R5-Tunnel0/0/1]nhrp network-id 101
[R5-Tunnel0/0/1]nhrp entry multicast dynamic
[R5-Tunnel0/0/1]nhrp entry 10.1.2.1 41.1.1.1 register
[R5-Tunnel0/0/1]nhrp entry 10.1.2.3 64.1.1.1 register
R6配置
[R6]int t0/0/1
[R6-Tunnel0/0/1]ip add 10.1.2.3 24
[R6-Tunnel0/0/1]tunnel-protocol gre p2mp
[R6-Tunnel0/0/1]source 64.1.1.1
[R6-Tunnel0/0/1]nhrp network-id 101
[R6-Tunnel0/0/1]nhrp entry multicast dynamic
[R6-Tunnel0/0/1]nhrp entry 10.1.2.1 41.1.1.1 register
[R6-Tunnel0/0/1]nhrp entry 10.1.2.2 54.1.1.1 register

七、书写OSPF以及接口工作方式修改实现全网可达

R1
[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]area 0
[R1-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255
[R1-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
[R1-ospf-1-area-0.0.0.0]network 10.1.2.0 0.0.0.255
[R1]int t0/0/0
[R1-Tunnel0/0/0]ospf network-type p2p
[R1-Tunnel0/0/0]int t0/0/1
[R1-Tunnel0/0/1]ospf network-type broadcast
R2
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255
[R2-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
[R2]int t0/0/0
[R2-Tunnel0/0/0]ospf network-type p2p
R3
[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 192.168.3.0 0.0.0.255
[R3-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
[R3]int t0/0/0
[R3-Tunnel0/0/0]ospf network-type p2p
R5
[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]area 0
[R5-ospf-1-area-0.0.0.0]network 192.168.4.0 0.0.0.255
[R5-ospf-1-area-0.0.0.0]network 10.1.2.0 0.0.0.255
[R5]int t0/0/1
[R5-Tunnel0/0/1]ospf network-type broadcast
R6
[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1]area 0
[R6-ospf-1-area-0.0.0.0]network 192.168.5.0 0.0.0.255
[R6-ospf-1-area-0.0.0.0]network 10.1.2.0 0.0.0.255
[R6]int t0/0/1
[R6-Tunnel0/0/1]ospf network-type broadcast