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OSPF综合

news 2025/8/8 22:33:36

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

R3

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

R5

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

R6

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

R7

#
interface GigabitEthernet0/0/0ip address 47.1.1.1 255.255.255.0 
#
interface GigabitEthernet0/0/1ip address 172.16.96.1 255.255.255.252 
#
interface LoopBack0ip address 172.16.2.1 255.255.255.128 
#

配置私网IP

R1

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

R2

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

R8

#
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
#
interface GigabitEthernet0/0/1ip address 172.16.96.5 255.255.255.252 
#
interface LoopBack0ip address 172.16.97.1 255.255.255.128 
#

R9

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

R10

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

R11

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

R12

#
interface GigabitEthernet0/0/0ip address 172.16.64.6 255.255.255.252 
#
interface LoopBack0ip address 172.16.160.1 255.255.240.0 
#
interface LoopBack1ip 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 Tunnel0/0/0ip address 172.16.0.129 255.255.255.248 tunnel-protocol gre p2mpsource 34.1.1.1ospf network-type broadcastnhrp entry multicast dynamic
#

R5

#
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
#

R6

#
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
#

R7

#
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
#

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 172.16.32.0 255.255.224.0network 172.16.32.0 0.0.31.255 stub no-summary
#

Area2

R6

#area 0.0.0.2 abr-summary 172.16.64.0 255.255.224.0network 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 172.16.160.0 255.255.224.0import-route rip 1area 0.0.0.2 network 172.16.64.6 0.0.0.0 nssa
#

Area3

R7

#area 0.0.0.3 abr-summary 172.16.96.0 255.255.224.0network 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 172.16.128.0 255.255.224.0import-route ospf 2area 0.0.0.3 network 172.16.96.0 0.0.0.255 nssa
#

Area4

R9

#
ospf 2 default-route-advertisearea 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 Serial4/0/0nat outbound 2000
#

R6

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

R7

#
acl number 2000  rule 5 permit source 172.16.0.0 0.0.255.255 
#
interface GigabitEthernet0/0/0nat 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
#

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IP配置

ISP（R4）

R3

R5

R6

R7

R1

R2

R8

R9

R10

R11

R12

配置公网路由

R3

R5

R6

R7

配置MGRE

R3

R5

R6

R7

OSPF

R3

R5

R6

R7

R1

R2

R3

R6

R11

R12

R7

R8

R9

R9

R10

ACL控制访问

R3

R6

R7

接口认证及更改Hello timer

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