OSPF星型拓扑和MGRE全连改

一，拓扑

二，要求

1，R6为ISP只能配置IP地址，R1-R5的环回为私有网段

2，R1/4/5为全连的MGRE结构，R1/2/3为星型的拓扑结构，

3，R1为中心站点所有私有网段可以互相通讯，私有网段使用osPF完成

三，配置

r1

IP配置：

$r1$ interface GigabitEthernet 0/0/0

$r1-GigabitEthernet0/0/0$ ip address 16.0.0.1 24

$r1$ interface GigabitEthernet 0/0/1

$r1-GigabitEthernet0/0/1$ ip address 17.0.0.1 24

$r1$ interface LoopBack 0

$r1-LoopBack0$ ip address 192.168.1.1 24

缺省路由：

$r1$ ip route-static 0.0.0.0 0 16.0.0.2

$r1$ ip route-static 0.0.0.0 0 17.0.0.2

隧道接口配置：

$r1$ interface Tunnel 0/0/0

$r1-Tunnel0/0/0$ ip address 10.1.1.1 24

$r1-Tunnel0/0/0$ tunnel-protocol gre p2mp

$r1-Tunnel0/0/0$ source 16.0.0.1

$r1-Tunnel0/0/0$ ospf network-type broadcast //修改接口类型

$r1-Tunnel0/0/0$ nhrp entry multicast dynamic//开启伪广播来实现OSPF的组播功能

隧道接口配置：

$r1$ interface Tunnel 0/0/1

$r1-Tunnel0/0/1$ shutdown //关闭接口，方便配置实现

$r1-Tunnel0/0/1$ ip address 10.1.2.1 24

$r1-Tunnel0/0/1$ tunnel-protocol gre p2mp

$r1-Tunnel0/0/1$ source GigabitEthernet 0/0/1

$r1-Tunnel0/0/1$ nhrp entry 10.1.2.2 46.0.0.1 register

$r1-Tunnel0/0/1$ nhrp entry 10.1.2.3 56.0.0.1 register

$r1-Tunnel0/0/1$ ospf network-type broadcast

OSPF配置：

$r1$ ospf 1 router-id 1.1.1.1

$r1-ospf-1$ are

$r1-ospf-1$ area 0

$r1-ospf-1-area-0.0.0.0$ net

$r1-ospf-1-area-0.0.0.0$ 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

$r1-ospf-1-area-0.0.0.0$ network 192.168.1.0 0.0.0.255

$r1$ interface Tunnel 0/0/1 //开启接口

$r1-Tunnel0/0/1$ undo shutdown

r2

IP配置：

$r2$ interface GigabitEthernet 0/0/0

$r2-GigabitEthernet0/0/0$ ip address 26.0.0.1 24

$r2$ interface LoopBack 0

$r2-LoopBack0$ ip address 192.168.2.1 24

缺省路由：

$r2$ ip route-static 0.0.0.0 0 26.0.0.2

隧道接口配置：

$r2$ interface Tunnel 0/0/0

$r2-Tunnel0/0/0$ ip address 10.1.1.2 24

$r2-Tunnel0/0/0$ tunnel-protocol gre p2mp

$r2-Tunnel0/0/0$ source GigabitEthernet 0/0/0

$r2-Tunnel0/0/0$ nhrp entry 10.1.1.1 16.0.0.1 register

$r2-Tunnel0/0/0$ ospf network-type broadcast

$r2-Tunnel0/0/0$ ospf dr-priority 0

OSPF配置：

$r2$ ospf 1 router-id 2.2.2.2

$r2-ospf-1$ area 0

$r2-ospf-1-area-0.0.0.0$ network 10.1.1.0 0.0.0.255

$r2-ospf-1-area-0.0.0.0$ network 192.168.2.0 0.0.0.255

r3

IP配置：

$r3$ interface GigabitEthernet 0/0/0

$r3-GigabitEthernet0/0/0$ ip address 36.0.0.1 24

$r3$ interface LoopBack 0

$r3-LoopBack0$ ip address 192.168.3.1 24

缺省路由：

$r3$ ip route-static 0.0.0.0 0 36.0.0.2

隧道接口配置：

$r3$ interface Tunnel 0/0/0

$r3-Tunnel0/0/0$ ip address 10.1.1.3 24

$r3-Tunnel0/0/0$ tunnel-protocol gre p2mp

$r3-Tunnel0/0/0$ source GigabitEthernet 0/0/0

$r3-Tunnel0/0/0$ nhrp entry 10.1.1.1 16.0.0.1 register

$r3-Tunnel0/0/0$ ospf network-type broadcast

OSPF配置：

$r3$ 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

r4

IP配置：

$r4$ interface GigabitEthernet 0/0/0

$r4-GigabitEthernet0/0/0$ ip address 46.0.0.1 24

$r4$ interface LoopBack 0

$r4-LoopBack0$ ip address 192.168.4.1 24

缺省路由：

$r4$ ip route-static 0.0.0.0 0 46.0.0.2

隧道接口配置：

$r4$ interface Tunnel 0/0/0

$r4-Tunnel0/0/0$ shutdown

$r4-Tunnel0/0/0$ ip address 10.1.2.2 24

$r4-Tunnel0/0/0$ tunnel-protocol gre p2mp

$r4-Tunnel0/0/0$ source GigabitEthernet 0/0/0

$r4-Tunnel0/0/0$ nhrp entry 10.1.2.1 17.0.0.1 register

$r4-Tunnel0/0/0$ nhrp entry 10.1.2.3 56.0.0.1 register

$r4-Tunnel0/0/0$ ospf network-type broadcast

OSPF配置：

$r4$ ospf 1 router-id 4.4.4.4

$r4-ospf-1$ area 0

$r4-ospf-1-area-0.0.0.0$ network 192.168.4.0 0.0.0.255

$r4-ospf-1-area-0.0.0.0$ network 10.1.2.0 0.0.0.255

开启接口

$r4$ interface Tunnel 0/0/0

$r4-Tunnel0/0/0$ undo shutdown

r5IP配置：

$r5$ interface GigabitEthernet 0/0/0

$r5-GigabitEthernet0/0/0$ ip address 56.0.0.1 24

$r5$ interface LoopBack 0

$r5-LoopBack0$ ip address 192.168.5.1 24

缺省路由：

$r5$ ip route-static 0.0.0.0 0 56.0.0.2

隧道接口配置：

$r5$ interface Tunnel 0/0/0

$r5-Tunnel0/0/0$ shutdown

$r5-Tunnel0/0/0$ ip address 10.1.2.3 24

$r5-Tunnel0/0/0$ tunnel-protocol gre p2mp

$r5-Tunnel0/0/0$ source GigabitEthernet 0/0/0

$r5-Tunnel0/0/0$ nhrp entry 10.1.2.1 17.0.0.1 register

$r5-Tunnel0/0/0$ nhrp entry 10.1.2.2 46.0.0.1 register

$r5-Tunnel0/0/0$ ospf network-type broadcast

OSPF配置：

$r5$ ospf 1 router-id 5.5.5.5

$r5-ospf-1$ area 0

$r5-ospf-1-area-0.0.0.0$ network 192.168.5.0 0.0.0.255

$r5-ospf-1-area-0.0.0.0$ network 10.1.2.0 0.0.0.255

$r5$ interface Tunnel 0/0/0

$r5-Tunnel0/0/0$ undo shutdown

r6

IP配置：

$r6$ interface GigabitEthernet 4/0/0

$r6-GigabitEthernet4/0/0$ ip address 17.0.0.2 24

$r6$ interface GigabitEthernet 0/0/0

$r6-GigabitEthernet0/0/0$ ip address 16.0.0.2 24

$r6$ interface GigabitEthernet 0/0/1

$r6-GigabitEthernet0/0/1$ ip address 26.0.0.2 24

$r6$ interface GigabitEthernet 0/0/2

$r6-GigabitEthernet0/0/2$ ip address 36.0.0.2 24

$r6$ interface GigabitEthernet 2/0/0

$r6-GigabitEthernet2/0/0$ ip address 46.0.0.2 24

$r6$ interface GigabitEthernet 3/0/0

$r6-GigabitEthernet3/0/0$ ip address 56.0.0.2 24

OSPF星型拓扑和MGRE全连改

一，拓扑

二，要求

三，配置

四，测试