1. Experimental requirements
1. R4 is an ISP, and only IP addresses can be configured on it; R4 and all other directly connected devices use public IP;
2. R3---R5/6/7 is an MGRE environment, and R3 is the central site;
3. The entire OSPF The environmental IP address is 172.16.0.0/16;
4. All devices can access the loopback of R4;
5. Reduce the amount of LSA updates, speed up convergence, and ensure update security G4;6. The whole network is reachable;
2. Experimental topology
3. Experimental process
1. IP address planning:
172.168.0.0/16 (6 areas, divided into 8 subnets)
172.168.0.0/19 A0
Only two backbone IP addresses are needed - 172.16.0.0/25==172.16.0.0/30
The backbone network segment required by multiple IP addresses——172.16.0.128/25==17.168.0.128/29
terminal --user 172.16.1.0/25 172.16.1.128/25 ----- 172.16.31.128/25
172.168.32.0/19 A1
172.168.64.0/19A2
172.168.96.0/19A3
172.168.128.0/19 A4
172.168.160.0/19 RIP
172.168.192.0/19
172.168.1.224/19
2. Configure the public network IP address -> configure the public network default route to enable public network interworking -> start mgre of R3567 -> configure the IP address and loopback interface in the A1234 area -> configure OSPF -> change the tunnel interface type in the A0 area -> Perform redistribution on R12, so that devices running OSPF can learn extra-domain routes -> Change AREA4 to extra-domain routes to reduce routing information -> Do inter-domain routing summary on ABR devices and ASBR devices to do extra-domain routing Routing summary -> Perform inter-domain route summary on the ABR device and extra-domain route summary on the ASBR device -> Make empty interfaces on the routers that have done subnet summary for ABR and ASBR to prevent loops -> Access to the public network . Configure the NAT protocol -> configure area authentication for AREA1 to ensure update security -> speed up convergence
4. Device configuration
R3:
1.配置IP地址 <Huawei>sys [Huawei]sysname r3 [r3]int g0/0/2 [r3-GigabitEthernet0/0/2]ip address 34.1.1.1 24 2.配置缺省路由使公网互通 [r3]ip route-static 0.0.0.0 0 34.1.1.2 3.建立mgre R3为中心站点 [r3]interface Tunnel0/0/0 [r3]ip address 172.16.0.129 255.255.255.248 [r3]tunnel-protocol gre p2mp [r3]source 43.1.1.1 [r3]ospf network-type broadcast [r3]nhrp entry multicast dynamic [r3]nhrp network-id 100
R5:
1.配置IP地址 <Huawei>sys [Huawei]sysname r5 [r5]int g0/0/2 [r5-GigabitEthernet0/0/2]ip address 45.1.1.1 24 2.配置缺省路由使公网互通 [r5]ip route-static 0.0.0.0 0 45.1.1.2 3.建立mgre [r5]int t0/0/0 [r5-Tunnel0/0/0]ip a 172.16.1.2 29 [r5-Tunnel0/0/0]tunnel-protocol gre p2mp [r5-Tunnel0/0/0]source Serial 4/0/0 [r5-Tunnel0/0/0]nhrp network-id 100 [r5-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register
R6:
1.配置IP地址 <Huawei>sys [Huawei]sysname r6 [r6]int g0/0/2 [r6-GigabitEthernet0/0/2]ip address 46.1.1.1 24 2.配置缺省路由使公网互通 [R6]ip route-static 0.0.0.0 0 46.1.1.2 3.建立mgre [r6]int t0/0/0 [r6-Tunnel0/0/0]ip a 172.16.1.3 29 [r6-Tunnel0/0/0]tunnel-protocol gre p2mp [r6-Tunnel0/0/0]source Serial 4/0/0 [r6-Tunnel0/0/0]nhrp network-id 100 [r6-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register
R7:
1.配置IP地址 <Huawei>sys [Huawei]sysname R7 [R7]int g0/0/0 [R7-GigabitEthernet0/0/0]ip address 47.1.1.1 24 2.配置缺省路由使公网互通 [R7]ip route-static 0.0.0.0 0 47.1.1.2 3.建立mgre [r7]int t0/0/0 [r7-Tunnel0/0/0]ip a 172.16.1.4 29 [r7-Tunnel0/0/0]tunnel-protocol gre p2mp [r7-Tunnel0/0/0]source GigabitEthernet 0/0/0 [r7-Tunnel0/0/0]nhrp network-id 100 [r7-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register
R4:
1.配置IP地址 <Huawei>sys [Huawei]sysname R4 [R4]int g0/0/0 [R4-GigabitEthernet0/0/0]ip address 34.1.1.2 24 [R4-GigabitEthernet0/0/0]int g0/0/1 [R4-GigabitEthernet0/0/1]ip address 45.1.1.2 24 [R4-GigabitEthernet0/0/1]int g0/0/2 [R4-GigabitEthernet0/0/2]ip address 46.1.1.2 24 [R4-GigabitEthernet0/0/2]int g4/0/0 [R4-GigabitEthernet4/0/0]ip address 47.1.1.2 24 [R4-LoopBack0]ip address 4.4.4.4 24//配置运营商的环回
R1:
1.配置IP地址和环回接口 [r1]int g0/0/0 [r1-GigabitEthernet0/0/0]ip a 172.16.33.1 29 [r1-GigabitEthernet0/0/0]int lo0 [r1-LoopBack0]ip a 172.16.34.1 24
R2:
1.配置IP地址和环回接口 [r2]int g 0/0/0 [r2-GigabitEthernet0/0/0]ip a 172.16.33.2 29 [r2-GigabitEthernet0/0/0]int lo0 [r2-LoopBack0]ip a 172.16.35.1 24
R3:
1.配置IP地址和环回接口 [r3]int g0/0/0 [r3-GigabitEthernet0/0/0]ip a 172.16.33.3 29 [r3-GigabitEthernet0/0/0]int lo0 [r3-LoopBack0]ip a 172.16.36.1 24
R6:
1.配置IP地址 [r6]int g0/0/0 [r6-GigabitEthernet0/0/0]ip a 172.16.65.1 29
R7:
1.配置IP地址 [r7]int g 0/0/1 [r7-GigabitEthernet0/0/1]ip a 172.16.97.1 29
R8:
1.配置IP地址和环回接口 [r8]int g0/0/0 [r8-GigabitEthernet0/0/0]ip a 172.16.97.2 29 [r8-GigabitEthernet0/0/0]int lo0 [r8-LoopBack0]ip a 172.16.98.1 24 [r8-LoopBack0]int g 0/0/1 [r8-GigabitEthernet0/0/1]ip a 172.16.97.9 29
R9:
1.配置IP地址和环回接口 [r9]int g0/0/0 [r9-GigabitEthernet0/0/0]ip a 172.16.97.10 29 [r9-GigabitEthernet0/0/0]int g0/0/1 [r9-GigabitEthernet0/0/1]ip a 172.16.129.1 29 [r9-GigabitEthernet0/0/1]int lo0 [r9-LoopBack0]ip a 172.16.130.1 24
R10:
1.配置IP地址和环回接口 [r10]int g0/0/0 [r10-GigabitEthernet0/0/0]ip a 172.16.129.2 29 [r10-GigabitEthernet0/0/0]int lo0 [r10-LoopBack0]ip a 172.16.131.1 24
R11:
1.配置IP地址和环回接口 [r11]int g 0/0/0 [r11-GigabitEthernet0/0/0]ip a 172.16.65.2 29 [r11-GigabitEthernet0/0/0]int lo0 [r11-LoopBack0]ip a 172.16.66.1 24 [r11-GigabitEthernet0/0/1]ip a 172.16.65.9 29
R12:
1.配置IP地址和环回接口 [r12]int g0/0/0 [r12-GigabitEthernet0/0/0]ip a 172.16.65.10 29 [r12]int lo0 [r12-LoopBack0]ip a 172.16.160.1 20 [r12-LoopBack0]int lo1 [r12-LoopBack1]ip a 172.16.176.1 20
R1:
配置OSPF [r1]ospf 1 router-id 1.1.1.1 [r1-ospf-1]a 1 [r1-ospf-1-area-0.0.0.1]network 172.16.0.0 0.0.255.255
R2:
配置OSPF [r2]ospf 1 router-id 2.2.2.2 [r2-ospf-1]a 1 [r2-ospf-1-area-0.0.0.1]network 172.16.0.0 0.0.255.255
R3:
配置OSPF [r3]ospf 1 router-id 3.3.3.3 [r3-ospf-1]a 1 [r3-ospf-1-area-0.0.0.1]network 172.16.32.0 0.0.7.255 [r3-ospf-1-area-0.0.0.1]a 0 [r3-ospf-1-area-0.0.0.0]net [r3-ospf-1-area-0.0.0.0]network 172.16.1.1 0.0.0.0
R5:
配置OSPF [r5]ospf 1 rout [r5]ospf 1 router-id 5.5.5.5 [r5-ospf-1]a 0 [r5-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255
R6:
配置OSPF [r6]ospf 1 router-id 6.6.6.6 [r6-ospf-1]a 0 [r6-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.3.255 [r6-ospf-1-area-0.0.0.0]a 2 [r6-ospf-1-area-0.0.0.2]network 172.16.65.1 0.0.0.0
R7:
配置OSPF [r7]ospf 1 router-id 7.7.7.7 [r7-ospf-1]a 0 [r7-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.7.255 [r7-ospf-1-area-0.0.0.0]a 3 [r7-ospf-1-area-0.0.0.3]network 172.16.97.1 0.0.0.0
R8:
配置OSPF [r8]ospf 1 router-id 8.8.8.8 [r8-ospf-1]a 3 [r8-ospf-1-area-0.0.0.3]network 172.16.0.0 0.0.255.255
R9:
配置OSPF [r9]ospf 1 router-id 9.9.9.9 [r9-ospf-1]a 3 [r9-ospf-1-area-0.0.0.3]network 172.16.97.10 0.0.0.0 [r9-ospf-1-area-0.0.0.3]a 4 [r9-ospf-1-area-0.0.0.4]network 172.16.128.0 0.0.3.255
R10:
配置OSPF [r10]ospf 1 router-id 10.10.10.10 [r10-ospf-1]a 4 [r10-ospf-1-area-0.0.0.4]network 172.16.0.0 0.0.255.255
R11:
配置OSPF [r11]ospf 1 router-id 11.11.11.11 [r11-ospf-1]a 2 [r11-ospf-1-area-0.0.0.2]network 172.16.0.0 0.0.255.255
R12:
配置OSPF [r12]ospf 1 router-id 12.12.12.12 [r12-ospf-1]a 2 [r12-ospf-1-area-0.0.0.2]network 172.16.65.10 0.0.0.0 [r12]rip 1 [r12-rip-1]v 2 [r12-rip-1]network 172.16.0.0
R3:
更改Tunnel接口类型 [r3]int t0/0/0 [r3-Tunnel0/0/0]ospf network-type p2mp
R5:
更改Tunnel接口类型 [r5]int t0/0/0 [r5-Tunnel0/0/0]ospf network-type p2mp
R6:
更改Tunnel接口类型 [r6]int t0/0/0 [r6-Tunnel0/0/0]ospf network-type p2mp
R7:
更改Tunnel接口类型 [r7]int t0/0/0 [r7-Tunnel0/0/0]ospf network-type p2mp
R12:
对R12进行重发布,从而可以让运行OSPF的设备学习到域外路由 [r12]ospf 1 [r12-ospf-1]import-route rip 1
R9:
将A4更改为域外路由,减少路由信息 [r9]ospf 1 [r9-ospf-1]a 4 [r9-ospf-1-area-0.0.0.4]undo network 172.16.128.0 0.0.3.255 [r9-ospf-1-area-0.0.0.4]q [r9-ospf-1]undo a 4 [r9-ospf-1]q [r9]ospf 2 rout [r9]ospf 2 router-id 9.9.9.9 [r9-ospf-2]a 4 [r9-ospf-2-area-0.0.0.4]net [r9-ospf-2-area-0.0.0.4]network 172.16.128.0 0.0.3.255 [r9]ospf 1 [r9-ospf-1]import-route ospf 2 [r9]ospf 2 [r9-ospf-2]de [r9-ospf-2]default-route-advertise //将AREA4改为域外路由,以此来做特殊区域来减少路由条目的数量因此在R9上重新开启一个OSPF进程,进行重发布。(不用虚链路和Tunnel隧道技术是因为要做特殊区域,因此这里要用双向重发布,但是在此拓扑当中只需要单项重发布,然后在写一条缺省路由即可。)
R3:
在ABR的设备上做域间路由汇总以及ASBR的设备上做域外路由汇总 [r3]ospf 1 [r3-ospf-1]a 1 [r3-ospf-1-area-0.0.0.1]abr-summary 172.16.32.0 255.255.224.0
R6:
在ABR的设备上做域间路由汇总以及ASBR的设备上做域外路由汇总 [r6]ospf 1 [r6-ospf-1]a 2 [r6-ospf-1-area-0.0.0.2]abr-summary 172.16.64.0 255.255.224.0
R7:
在ABR的设备上做域间路由汇总以及ASBR的设备上做域外路由汇总 [r7]ospf 1 [r7-ospf-1]a 3 [r7-ospf-1-area-0.0.0.3]abr-summary 172.16.96.0 255.255.224.0
R9:
在ABR的设备上做域间路由汇总以及ASBR的设备上做域外路由汇总 [r9]ospf 1 [r9-ospf-1]asbr-summary 172.16.128.0 255.255.224.0
R12:
在ABR的设备上做域间路由汇总以及ASBR的设备上做域外路由汇总 [r12]ospf 1 [r12-ospf-1]asbr-summary 172.16.160.0 255.255.224.0
R1:
将A1、A2、A3做成特殊区域,来实现路由条目的减少 [r1]ospf 1 [r1-ospf-1]a 1 [r1-ospf-1-area-0.0.0.1]stub
R2:
将AREA1、AREA2、AREA3做成特殊区域,来实现路由条目的减少 [r2]ospf 1 [r2-ospf-1]a 1 [r2-ospf-1-area-0.0.0.1]stub
R3:
将AREA1、AREA2、AREA3做成特殊区域,来实现路由条目的减少 [r3]ospf 1 [r3-ospf-1]a 1 [r3-ospf-1-area-0.0.0.1]stub no-summary
R6:
将AREA1、AREA2、AREA3做成特殊区域,来实现路由条目的减少 [r6]ospf 1 [r6-ospf-1]a 2 [r6-ospf-1-area-0.0.0.2]nssa no-summary
R11:
将AREA1、AREA2、AREA3做成特殊区域,来实现路由条目的减少 r11]ospf 1 [r11-ospf-1]a 2 [r11-ospf-1-area-0.0.0.2]nssa
R12:
将AREA1、AREA2、AREA3做成特殊区域,来实现路由条目的减少 [r12]ospf 1 [r12-ospf-1]a 2 [r12-ospf-1-area-0.0.0.2]nssa
R7:
将AREA1、AREA2、AREA3做成特殊区域,来实现路由条目的减少 [r7]ospf 1 [r7-ospf-1]a 3 [r7-ospf-1-area-0.0.0.3]nssa no-summary
R8:
将AREA1、AREA2、AREA3做成特殊区域,来实现路由条目的减少 [r8]ospf 1 [r8-ospf-1]a 3 [r8-ospf-1-area-0.0.0.3]nssa
R9:
将AREA1、AREA2、AREA3做成特殊区域,来实现路由条目的减少 [r9]ospf 1 [r9-ospf-1]a 3 [r9-ospf-1-area-0.0.0.3]nssa
R3:
对ABR及ASBR做过子网汇总的路由器做空接口来进行防环 [r3]ip route-static 172.16.32.0 19 NULL 0
R6:
对ABR及ASBR做过子网汇总的路由器做空接口来进行防环 [r6]ip route-static 172.16.64.0 19 NULL 0
R7:
对ABR及ASBR做过子网汇总的路由器做空接口来进行防环 [r7]ip route-static 172.16.96.0 19 NULL 0
R9:
对ABR及ASBR做过子网汇总的路由器做空接口来进行防环 [r9]ip route-static 172.16.128.0 19 NULL 0
R12:
对ABR及ASBR做过子网汇总的路由器做空接口来进行防环 [r12]ip route-static 172.16.160.0 19 NULL 0
R3:
能够进行访问到公网。进行NAT协议的配置 [r3]acl 2000 [r3-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255 [r3]int s 4/0/0 [r3-Serial4/0/0]nat outbound 2000
R5:
能够进行访问到公网。进行NAT协议的配置 [r5]acl 2000 [r5-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255 [r5]int s4/0/0 [r5-Serial4/0/0]nat outbound 2000
R6:
能够进行访问到公网。进行NAT协议的配置 [r6]acl 2000 [r6-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255 [r6]int s 4/0/0 [r6-Serial4/0/0]nat outbound 2000
R7:
能够进行访问到公网。进行NAT协议的配置 [r7]acl 2000 [r7-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255 [r7]int g0/0/0 [r7-GigabitEthernet0/0/0]nat outbound 2000
R1:
对AREA1进行区域认证的配置,保证更新安全 [r1]ospf 1 [r1-ospf-1]a 1 [r1-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
R2:
对AREA1进行区域认证的配置,保证更新安全 [r2]ospf 1 [r2-ospf-1]a 1 [r2-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
R3:
对AREA1进行区域认证的配置,保证更新安全 [r3]ospf 1 [r3-ospf-1]a 1 [r3-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
R3:
加快收敛 [r3]int t0/0/0 [r3-Tunnel0/0/0]ospf timer hello 10
R5:
加快收敛 [r5]int t0/0/0 [r5-Tunnel0/0/0]ospf timer hello 10
R6:
加快收敛 [r6]int t0/0/0 [r6-Tunnel0/0/0]ospf timer hello 10
R7:
加快收敛 [r7]int t0/0/0 [r7-Tunnel0/0/0]ospf timer hello 10
5. Experimental results