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 Serial3/0/0
 link-protocol ppp
 ip address 46.1.1.2 255.255.255.0 
#
interface Serial4/0/0
 link-protocol ppp
 ip address 34.1.1.2 255.255.255.0 
#
interface Serial4/0/1
 link-protocol ppp
 ip address 45.1.1.2 255.255.255.0 
#
interface GigabitEthernet0/0/0
 ip address 47.1.1.2 255.255.255.0 
#
interface LoopBack0
 ip address 4.4.4.4 255.255.255.0 
#
R3
#
interface Serial4/0/0
 link-protocol ppp
 ip address 34.1.1.1 255.255.255.0 
#
interface GigabitEthernet0/0/0
 ip address 172.16.32.131 255.255.255.248 
#
interface LoopBack0
 ip address 172.16.34.1 255.255.255.128 
#
R5
#
interface Serial4/0/0
 link-protocol ppp
 ip address 45.1.1.1 255.255.255.0 
#
interface LoopBack0
 ip address 172.16.1.1 255.255.255.128 
#
R6
#
interface Serial4/0/0
 link-protocol ppp
 ip address 46.1.1.1 255.255.255.0 
#
interface GigabitEthernet0/0/0
 ip address 172.16.64.1 255.255.255.252 
#
interface LoopBack0
 ip address 172.16.1.129 255.255.255.128 
#
R7
#
interface GigabitEthernet0/0/0
 ip address 47.1.1.1 255.255.255.0 
#
interface GigabitEthernet0/0/1
 ip address 172.16.96.1 255.255.255.252 
#
interface LoopBack0
 ip address 172.16.2.1 255.255.255.128 
#
配置私网IP
R1
#
interface GigabitEthernet0/0/0
 ip address 172.16.32.129 255.255.255.248 
#
interface LoopBack0
 ip address 172.16.33.1 255.255.255.128 
#
R2
#
interface GigabitEthernet0/0/0
 ip address 172.16.32.130 255.255.255.248 
#
interface LoopBack0
 ip address 172.16.33.129 255.255.255.128 
#
R8
#
interface GigabitEthernet0/0/0
 ip address 172.16.96.2 255.255.255.252 
 ospf authentication-mode md5 1 cipher %$%$-6D,Eji%RNS3W;WS1eq/sYl1%$%$
 ospf timer hello 5
#
interface GigabitEthernet0/0/1
 ip address 172.16.96.5 255.255.255.252 
#
interface LoopBack0
 ip address 172.16.97.1 255.255.255.128 
#
R9
#
interface GigabitEthernet0/0/1
 ip address 172.16.128.1 255.255.255.252 
#
interface LoopBack0
 ip address 172.16.129.1 255.255.255.128 
#
R10
#
interface GigabitEthernet0/0/0
 ip address 172.16.128.2 255.255.255.252 
#
interface LoopBack0
 ip address 172.16.129.129 255.255.255.128 
#
R11
#
interface GigabitEthernet0/0/0
 ip address 172.16.64.2 255.255.255.252 
#
interface GigabitEthernet0/0/1
 ip address 172.16.64.5 255.255.255.252 
#
interface LoopBack0
 ip address 172.16.65.1 255.255.255.128 
#
R12
#
interface GigabitEthernet0/0/0
 ip address 172.16.64.6 255.255.255.252 
#
interface LoopBack0
 ip address 172.16.160.1 255.255.240.0 
#
interface LoopBack1
 ip address 172.16.176.1 255.255.240.0 
#
配置公网路由
R3
#
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
#
R5
#
ip route-static 0.0.0.0 0.0.0.0 45.1.1.2
#
R6
#
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
#
R7
#
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
#
配置MGRE
R3
#
interface Tunnel0/0/0
 ip address 172.16.0.129 255.255.255.248 
 tunnel-protocol gre p2mp
 source 34.1.1.1
 ospf network-type broadcast
 nhrp entry multicast dynamic
#
R5
#
interface Tunnel0/0/0
 ip address 172.16.0.130 255.255.255.248 
 tunnel-protocol gre p2mp
 source Serial4/0/0
 ospf network-type broadcast
 ospf dr-priority 0
 nhrp entry 172.16.0.129 34.1.1.1 register
#
R6
#
interface Tunnel0/0/0
 ip address 172.16.0.131 255.255.255.248 
 tunnel-protocol gre p2mp
 source Serial4/0/0
 ospf network-type broadcast
 ospf dr-priority 0
 nhrp entry 172.16.0.129 34.1.1.1 register
#
R7
#
interface Tunnel0/0/0
 ip address 172.16.0.132 255.255.255.248 
 tunnel-protocol gre p2mp
 source GigabitEthernet0/0/0
 ospf network-type broadcast
 ospf dr-priority 0
 nhrp entry 172.16.0.129 34.1.1.1 register
#
OSPF
先配置公网 Area0
R3
#
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 
#
R5
#
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 
#
R6
#
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 
#
R7
#
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 
#
配置私网
Area1
R1
#
ospf 1 router-id 1.1.1.1 
 area 0.0.0.1 
  network 172.16.0.0 0.0.255.255 
  stub 
#
R2
#
ospf 1 router-id 2.2.2.2 
 area 0.0.0.1 
  network 172.16.0.0 0.0.255.255 
  stub 
#
R3
#
 area 0.0.0.1 
  abr-summary 172.16.32.0 255.255.224.0
  network 172.16.32.0 0.0.31.255 
  stub no-summary
#
Area2
R6
#
 area 0.0.0.2 
  abr-summary 172.16.64.0 255.255.224.0
  network 172.16.64.0 0.0.0.255 
  nssa no-summary
#
R11
#
ospf 1 router-id 11.11.11.11 
 area 0.0.0.2 
  network 172.16.0.0 0.0.255.255 
  nssa
#
R12
#
ospf 1 router-id 12.12.12.12 
 asbr-summary 172.16.160.0 255.255.224.0
 import-route rip 1
 area 0.0.0.2 
  network 172.16.64.6 0.0.0.0 
	nssa
#
Area3
R7
#
 area 0.0.0.3 
  abr-summary 172.16.96.0 255.255.224.0
  network 172.16.96.0 0.0.0.255 
  nssa no-summary
#
R8
#
ospf 1 router-id 8.8.8.8 
 area 0.0.0.3 
  network 172.16.0.0 0.0.255.255 
  nssa
#
R9
#
ospf 1 router-id 9.9.9.9 
 asbr-summary 172.16.128.0 255.255.224.0
 import-route ospf 2
 area 0.0.0.3 
  network 172.16.96.0 0.0.0.255 
  nssa
#
Area4
R9
#
ospf 2 
 default-route-advertise
 area 0.0.0.4 
  network 172.16.128.0 0.0.1.255 
#
R10
#
ospf 1 router-id 10.10.10.10 
 area 0.0.0.4 
  network 172.16.0.0 0.0.255.255 
#
ACL控制访问
R3
#
acl number 2000  
 rule 5 permit source 172.16.0.0 0.0.255.255 
#
interface Serial4/0/0
 nat outbound 2000
#
R6
#
acl number 2000  
 rule 5 permit source 172.16.0.0 0.0.255.255 
#
interface Serial4/0/0
 nat outbound 2000
#
R7
#
acl number 2000  
 rule 5 permit source 172.16.0.0 0.0.255.255 
#
interface GigabitEthernet0/0/0
 nat outbound 2000
#
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
#




















