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实验拓扑

实验需求：
1 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IP
2 R3-R5/6/7为MGRE环境，R3为中心站点 ;
3 整个OSPF环境IP基于172.16.0.0/16划分;
4 所有设备均可访问R4的环回;
5 减少LSA的更新量，加快收敛，保障更新安全;
6 全网可达

IP配置

先配置公网IP再配置私网IP

ISP（R4）

interface Serial3/0/0link-protocol pppip address 46.1.1.2 255.255.255.0 
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interface Serial4/0/0link-protocol pppip address 34.1.1.2 255.255.255.0 
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interface Serial4/0/1link-protocol pppip address 45.1.1.2 255.255.255.0 
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interface GigabitEthernet0/0/0ip address 47.1.1.2 255.255.255.0 
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interface LoopBack0ip address 4.4.4.4 255.255.255.0 
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R3

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interface Serial4/0/0link-protocol pppip address 34.1.1.1 255.255.255.0 
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interface GigabitEthernet0/0/0ip address 172.16.32.131 255.255.255.248 
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interface LoopBack0ip address 172.16.34.1 255.255.255.128 
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R5

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interface Serial4/0/0link-protocol pppip address 45.1.1.1 255.255.255.0 
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interface LoopBack0ip address 172.16.1.1 255.255.255.128 
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R6

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interface Serial4/0/0link-protocol pppip address 46.1.1.1 255.255.255.0 
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interface GigabitEthernet0/0/0ip address 172.16.64.1 255.255.255.252 
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interface LoopBack0ip address 172.16.1.129 255.255.255.128 
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R7

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interface GigabitEthernet0/0/0ip address 47.1.1.1 255.255.255.0 
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interface GigabitEthernet0/0/1ip address 172.16.96.1 255.255.255.252 
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interface LoopBack0ip address 172.16.2.1 255.255.255.128 
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配置私网IP

R1

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interface GigabitEthernet0/0/0ip address 172.16.32.129 255.255.255.248 
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interface LoopBack0ip address 172.16.33.1 255.255.255.128 
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R2

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interface GigabitEthernet0/0/0ip address 172.16.32.130 255.255.255.248 
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interface LoopBack0ip address 172.16.33.129 255.255.255.128 
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R8

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interface GigabitEthernet0/0/0ip address 172.16.96.2 255.255.255.252 ospf authentication-mode md5 1 cipher %$%$-6D,Eji%RNS3W;WS1eq/sYl1%$%$ospf timer hello 5
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interface GigabitEthernet0/0/1ip address 172.16.96.5 255.255.255.252 
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interface LoopBack0ip address 172.16.97.1 255.255.255.128 
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R9

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interface GigabitEthernet0/0/1ip address 172.16.128.1 255.255.255.252 
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interface LoopBack0ip address 172.16.129.1 255.255.255.128 
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R10

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interface GigabitEthernet0/0/0ip address 172.16.128.2 255.255.255.252 
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interface LoopBack0ip address 172.16.129.129 255.255.255.128 
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R11

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interface GigabitEthernet0/0/0ip address 172.16.64.2 255.255.255.252 
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interface GigabitEthernet0/0/1ip address 172.16.64.5 255.255.255.252 
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interface LoopBack0ip address 172.16.65.1 255.255.255.128 
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R12

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interface GigabitEthernet0/0/0ip address 172.16.64.6 255.255.255.252 
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interface LoopBack0ip address 172.16.160.1 255.255.240.0 
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interface LoopBack1ip address 172.16.176.1 255.255.240.0 
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配置公网路由

R3

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ip route-static 0.0.0.0 0.0.0.0 34.1.1.2
ip route-static 172.16.32.0 255.255.224.0 NULL0
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R5

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ip route-static 0.0.0.0 0.0.0.0 45.1.1.2
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R6

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ip route-static 0.0.0.0 0.0.0.0 46.1.1.2
ip route-static 172.16.64.0 255.255.224.0 NULL0
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R7

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ip route-static 0.0.0.0 0.0.0.0 47.1.1.2
ip route-static 172.168.96.0 255.255.224.0 NULL0
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配置MGRE

R3

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interface Tunnel0/0/0ip address 172.16.0.129 255.255.255.248 tunnel-protocol gre p2mpsource 34.1.1.1ospf network-type broadcastnhrp entry multicast dynamic
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R5

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interface Tunnel0/0/0ip address 172.16.0.130 255.255.255.248 tunnel-protocol gre p2mpsource Serial4/0/0ospf network-type broadcastospf dr-priority 0nhrp entry 172.16.0.129 34.1.1.1 register
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R6

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interface Tunnel0/0/0ip address 172.16.0.131 255.255.255.248 tunnel-protocol gre p2mpsource Serial4/0/0ospf network-type broadcastospf dr-priority 0nhrp entry 172.16.0.129 34.1.1.1 register
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R7

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interface Tunnel0/0/0ip address 172.16.0.132 255.255.255.248 tunnel-protocol gre p2mpsource GigabitEthernet0/0/0ospf network-type broadcastospf dr-priority 0nhrp entry 172.16.0.129 34.1.1.1 register
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OSPF

先配置公网 Area0

R3

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ospf 1 router-id 3.3.3.3 area 0.0.0.0 authentication-mode md5 1 cipher %$%$V2p(Ot,4>J<u_$ZlGD>Rs^P!%$%$network 172.16.0.129 0.0.0.0 
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R5

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ospf 1 router-id 5.5.5.5 area 0.0.0.0 authentication-mode md5 1 cipher %$%$uJ"tD%u5=),T65/K3x91s^xE%$%$network 172.16.0.0 0.0.255.255 
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R6

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ospf 1 router-id 6.6.6.6 area 0.0.0.0 authentication-mode md5 1 cipher %$%$gtkUAXe1W$Ba0*QPwH5Gs_3c%$%$network 172.16.0.0 0.0.1.255 
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R7

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ospf 1 router-id 7.7.7.7 area 0.0.0.0 authentication-mode md5 1 cipher %$%$r]Q`2E"07%UJj1D-:dr;s_e1%$%$network 172.16.0.0 0.0.3.255 
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配置私网

Area1

R1

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ospf 1 router-id 1.1.1.1 area 0.0.0.1 network 172.16.0.0 0.0.255.255 stub 
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R2

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ospf 1 router-id 2.2.2.2 area 0.0.0.1 network 172.16.0.0 0.0.255.255 stub 
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R3

#area 0.0.0.1 abr-summary 172.16.32.0 255.255.224.0network 172.16.32.0 0.0.31.255 stub no-summary
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Area2

R6

#area 0.0.0.2 abr-summary 172.16.64.0 255.255.224.0network 172.16.64.0 0.0.0.255 nssa no-summary
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R11

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ospf 1 router-id 11.11.11.11 area 0.0.0.2 network 172.16.0.0 0.0.255.255 nssa
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R12

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ospf 1 router-id 12.12.12.12 asbr-summary 172.16.160.0 255.255.224.0import-route rip 1area 0.0.0.2 network 172.16.64.6 0.0.0.0 nssa
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Area3

R7

#area 0.0.0.3 abr-summary 172.16.96.0 255.255.224.0network 172.16.96.0 0.0.0.255 nssa no-summary
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R8

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ospf 1 router-id 8.8.8.8 area 0.0.0.3 network 172.16.0.0 0.0.255.255 nssa
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R9

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ospf 1 router-id 9.9.9.9 asbr-summary 172.16.128.0 255.255.224.0import-route ospf 2area 0.0.0.3 network 172.16.96.0 0.0.0.255 nssa
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Area4

R9

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ospf 2 default-route-advertisearea 0.0.0.4 network 172.16.128.0 0.0.1.255 
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R10

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ospf 1 router-id 10.10.10.10 area 0.0.0.4 network 172.16.0.0 0.0.255.255 
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ACL控制访问

R3

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acl number 2000  rule 5 permit source 172.16.0.0 0.0.255.255 
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interface Serial4/0/0nat outbound 2000
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R6

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acl number 2000  rule 5 permit source 172.16.0.0 0.0.255.255 
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interface Serial4/0/0nat outbound 2000
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R7

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acl number 2000  rule 5 permit source 172.16.0.0 0.0.255.255 
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interface GigabitEthernet0/0/0nat outbound 2000
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接口认证及更改Hello timer

进入各路由器启用接口配置一下命令

#ospf authentication-mode md5 1 cipher %$%$)&LKK$xK<!T`!]V87a#2sYKg%$%$ospf timer hello 5
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