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实验拓扑
需求
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，R1为中心站点
3 所有私有网段可以互相通讯，私有网段使用OSPF完成。
IP规划
配置IP
R1
#
interface GigabitEthernet0/0/0ip address 16.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/1ip address 61.1.1.1 255.255.255.0
#
interface LoopBack0ip address 192.168.1.1 255.255.255.0
#
R2
#
interface GigabitEthernet0/0/0ip address 26.1.1.1 255.255.255.0
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interface LoopBack0ip address 192.168.2.1 255.255.255.0
#
R3
#
interface GigabitEthernet0/0/0ip address 36.1.1.1 255.255.255.0
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interface LoopBack0ip address 192.168.3.1 255.255.255.0
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R4
#
interface GigabitEthernet0/0/0ip address 46.1.1.1 255.255.255.0
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interface LoopBack0ip address 192.168.4.1 255.255.255.0
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R5
#
interface GigabitEthernet0/0/0ip address 56.1.1.1 255.255.255.0
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interface LoopBack0ip address 192.168.5.1 255.255.255.0
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R6
#
interface GigabitEthernet0/0/0ip address 16.1.1.2 255.255.255.0
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interface GigabitEthernet0/0/1ip address 61.1.1.2 255.255.255.0
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interface GigabitEthernet0/0/2ip address 56.1.1.2 255.255.255.0
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interface GigabitEthernet2/0/0ip address 26.1.1.2 255.255.255.0
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interface GigabitEthernet3/0/0ip address 36.1.1.2 255.255.255.0
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interface GigabitEthernet4/0/0ip address 46.1.1.2 255.255.255.0
#配置缺省路由
R1
#
ip route-static 0.0.0.0 0.0.0.0 16.1.1.2
ip route-static 0.0.0.0 0.0.0.0 61.1.1.2
#
R2
#
ip route-static 0.0.0.0 0.0.0.0 26.1.1.2
#
R3
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ip route-static 0.0.0.0 0.0.0.0 36.1.1.2
#
R4
#
ip route-static 0.0.0.0 0.0.0.0 46.1.1.2
#
R5
#
ip route-static 0.0.0.0 0.0.0.0 56.1.1.2
#
配置完成后测试各直连路由连通性
R1-R2R3的GRE环境配置
R1
#
interface Tunnel0/0/0ip address 10.1.1.1 255.255.255.0 tunnel-protocol gre p2mpsource 16.1.1.1nhrp entry multicast dynamicnhrp network-id 100
#
R2
#
interface Tunnel0/0/0ip address 10.1.1.2 255.255.255.0 tunnel-protocol gre p2mpsource GigabitEthernet0/0/0ospf dr-priority 0nhrp network-id 100nhrp entry 10.1.1.1 16.1.1.1 register
#
R3
#
interface Tunnel0/0/0ip address 10.1.1.3 255.255.255.0 tunnel-protocol gre p2mpsource GigabitEthernet0/0/0ospf dr-priority 0nhrp network-id 100nhrp entry 10.1.1.1 16.1.1.1 register
#
配置完成后测试tunnel隧道的连通性
R1-R4R5的MGRE环境配置
R1
#
interface Tunnel0/0/1ip address 10.1.2.1 255.255.255.0 tunnel-protocol gre p2mpsource 61.1.1.1nhrp entry multicast dynamic
#
R4
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interface Tunnel0/0/0ip address 10.1.2.2 255.255.255.0 tunnel-protocol gre p2mpsource 46.1.1.1nhrp entry 10.1.2.1 61.1.1.1 registernhrp entry 10.1.2.3 56.1.1.1 register
#
R5
#
interface Tunnel0/0/0ip address 10.1.2.3 255.255.255.0 tunnel-protocol gre p2mpsource 56.1.1.1nhrp entry multicast dynamicnhrp entry 10.1.2.1 61.1.1.1 register
#
配置完成后测试tunnel隧道的连通性
配置OSPF
R1的配置
#
ospf 1 router-id 1.1.1.1 area 0.0.0.0 network 10.1.1.1 0.0.0.0 network 10.1.2.1 0.0.0.0 network 192.168.1.1 0.0.0.0
##
interface Tunnel0/0/0ospf network-type broadcast#
GRE环境下的OSPF
R2
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ospf 1 router-id 2.2.2.2 area 0.0.0.0 network 10.1.1.2 0.0.0.0 network 192.168.2.1 0.0.0.0
##
interface Tunnel0/0/0ospf network-type broadcastospf dr-priority 0#
R3
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ospf 1 router-id 3.3.3.3 area 0.0.0.0 network 10.1.1.3 0.0.0.0 network 192.168.3.1 0.0.0.0
##
interface Tunnel0/0/0ospf network-type broadcastospf dr-priority 0#
MGRE环境下的OSPF
R4
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ospf 1 router-id 4.4.4.4 area 0.0.0.0 network 10.1.2.2 0.0.0.0 network 192.168.4.1 0.0.0.0
#
#
interface Tunnel0/0/0ospf network-type broadcast#
R5
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ospf 1 router-id 5.5.5.5 area 0.0.0.0 network 10.1.2.3 0.0.0.0 network 192.168.5.1 0.0.0.0
#
#
interface Tunnel0/0/0ospf network-type broadcast#