实验拓扑
实验要求:
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.所有设置均可方位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
实验配置:
1.Area0的配置
[R3]int Serial 4/0/0
[R3-Serial4/0/0]ip address 34.0.0.1 24
[R3-Serial4/0/0]q
[R3]ip route-static 0.0.0.0 0 34.0.0.2
[ISP]int s4/0/0
[ISP-Serial4/0/0]ip address 34.0.0.2 24
[ISP-Serial4/0/0]int s3/0/0
[ISP-Serial3/0/0]ip address 46.0.0.2 24
[ISP-Serial3/0/0]int s4/0/1
[ISP-Serial4/0/1]ip address 45.0.0.2 24
[ISP-Serial4/0/1]int g0/0/0
[ISP-GigabitEthernet0/0/0]ip address 47.0.0.2 24
[ISP-LoopBack0]ip address 4.4.4.4 24
[R5]int s4/0/0
[R5-Serial4/0/0]ip address 45.0.0.1 24
[R5-Serial4/0/0]int l0
[R5-LoopBack0]ip address 172.16.2.1 24
[R5-LoopBack0]q
[R5]ip route-static 0.0.0.0 0 45.0.0.2
[R6]int s4/0/0
[R6-Serial4/0/0]ip address 46.0.0.1 24.
[R6-Serial4/0/0]int l0
[R6-LoopBack0]ip address 172.16.3.1 24
[R6-LoopBack0]q
[R6]ip route-static 0.0.0.0 0 46.0.0.2
[R7]int g0/0/0
[R7-GigabitEthernet0/0/0]ip address 47.0.0.1 24
[R7-GigabitEthernet0/0/0]int l0
[R7-LoopBack0]ip address 172.16.4.1 24
[R7-LoopBack0]q
[R7]ip route-static 0.0.0.0 0 47.0.0.2
2.为R3-R5/6/7配置MGRE环境
[R3]int Tunnel 0/0/0
[R3-Tunnel0/0/0]ip address 172.16.1.1 29
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp
[R3-Tunnel0/0/0]source 34.0.0.1
[R3-Tunnel0/0/0]nhrp network-id 100
[R3-Tunnel0/0/0]nhrp entry multicast dynamic
[R5]int Tunnel 0/0/0
[R5-Tunnel0/0/0]ip address 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]int Tunnel 0/0/0
[R6-Tunnel0/0/0]ip address 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]int Tunnel 0/0/0
[R7-Tunnel0/0/0]ip address 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
3.配置其他路由器接口
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip address 172.16.33.1 29
[R1-GigabitEthernet0/0/0]int l0
[R1-LoopBack0]ip address 172.16.34.1 24
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip address 172.16.33.2 29
[R2-GigabitEthernet0/0/0]int l0
[R2-LoopBack0]ip address 172.16.35.1 24
[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]ip address 172.16.33.3 29
[R3-GigabitEthernet0/0/0]int l0
[R3-LoopBack0]ip address 172.16.36.1 24
[R6]int g0/0/0
[R6-GigabitEthernet0/0/0]ip address 172.16.65.1 29
[R7]int g0/0/1
[R7-GigabitEthernet0/0/1]ip address 172.16.97.1 29
[R8]int g0/0/0
[R8-GigabitEthernet0/0/0]ip address 172.16.97.2 29
[R8-GigabitEthernet0/0/0]int l0
[R8-LoopBack0]ip address 172.16.98.1 24
[R8-LoopBack0]int g0/0/1
[R8-GigabitEthernet0/0/1]ip address 172.16.97.9 29
[R9]int g0/0/0
[R9-GigabitEthernet0/0/0]ip address 172.16.97.10 29
[R9-GigabitEthernet0/0/0]int g0/0/1
[R9-GigabitEthernet0/0/1]ip address 172.16.129.1 29
[R9-GigabitEthernet0/0/1]int l0
[R9-LoopBack0]ip address 172.16.130.1 24
[R10]int g0/0/0
[R10-GigabitEthernet0/0/0]ip address 172.16.129.2 29
[R10-GigabitEthernet0/0/0]int l0
[R10-LoopBack0]ip address 172.16.131.1 24
[R11]int g0/0/0
[R11-GigabitEthernet0/0/0]ip address 172.16.65.2 29
[R11-GigabitEthernet0/0/0]int g0/0/1
[R11-GigabitEthernet0/0/1]ip address 172.16.65.9 29
[R11-GigabitEthernet0/0/1]int l0
[R11-LoopBack0]ip address 172.16.66.1 24
[R12]int g0/0/0
[R12-GigabitEthernet0/0/0]ip address 172.16.65.10 29
[R12-GigabitEthernet0/0/0]int l0
[R12-LoopBack0]ip address 172.16.160.1 20
[R12-LoopBack0]int l1
[R12-LoopBack1]ip address 172.16.176.1 20
4.配置OSPF
[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]area 1
[R1-ospf-1-area-0.0.0.1]network 172.16.0.0 0.0.255.255
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]network 172.16.0.0 0.0.255.255
[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]area 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]area 0
[R3-ospf-1-area-0.0.0.0]network 172.16.1.1 0.0.0.0
[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]area 0
[R5-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255
[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1]area 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]area 2
[R6-ospf-1-area-0.0.0.2]network 172.16.65.1 0.0.0.0
[R7]ospf 1 router-id 7.7.7.7
[R7-ospf-1]area 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]area 3
[R7-ospf-1-area-0.0.0.3]network 172.16.97.1 0.0.0.0
[R8]ospf 1 router-id 8.8.8.8
[R8-ospf-1]area 3
[R8-ospf-1-area-0.0.0.3]network 172.16.0.0 0.0.255.255
[R9]ospf 1 router-id 9.9.9.9
[R9-ospf-1]area 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]area 4
[R9-ospf-1-area-0.0.0.4]network 172.16.128.0 0.0.3.255
[R10]ospf 1 router-id 10.10.10.10
[R10-ospf-1]area 4
[R10-ospf-1-area-0.0.0.4]network 172.16.0.0 0.0.255.255
[R11]ospf 1 router-id 11.11.11.11
[R11-ospf-1]area 2
[R11-ospf-1-area-0.0.0.2]network 172.16.0.0 0.0.255.255
[R12]ospf 1 router-id 12.12.12.12
[R12-ospf-1]area 2
[R12-ospf-1-area-0.0.0.2]network 172.16.65.10 0.0.0.0
[R12]rip 1
[R12-rip-1]version 2
[R12-rip-1]network 172.16.0.0
5.更改类型接口
[R3]int Tunnel 0/0/0
[R3-Tunnel0/0/0]ospf network-type p2mp
[R5]int Tunnel 0/0/0
[R5-Tunnel0/0/0]ospf network-type p2mp
[R6]int Tunnel 0/0/0
[R6-Tunnel0/0/0]ospf network-type p2mp
[R7]int Tunnel 0/0/0
[R7-Tunnel0/0/0]ospf network-type p2mp
[R12]ospf 1
[R12-ospf-1]import-route rip 1
[R9]ospf 1
[R9-ospf-1]area 4
[R9-ospf-1-area-0.0.0.4]undo network 172.16.128.0 0.0.3.255
[R9-ospf-1]undo a
[R9-ospf-1]undo area 4
[R9]ospf 2 router-id 9.9.9.9
[R9-ospf-2]area 4
[R9-ospf-2-area-0.0.0.4]network 172.168.128.0 0.0.3.255
[R9-ospf-2-area-0.0.0.4]ospf 1
[R9-ospf-1]import-route ospf 2
[R9-ospf-1]ospf 2
[R9-ospf-2]default-route-advertise
[R3]ospf 1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]abr-summary 172.16.32.0 255.255.224.0
[R3]ip route-static 172.16.32.0 19 NULL 0
[R6]ospf 1
[R6-ospf-1]area 2
[R6-ospf-1-area-0.0.0.2]abr-summary 172.16.64.0 255.255.224.0
[R6]ip route-static 172.16.64.0 19 NULL 0
[R7]ospf 1
[R7-ospf-1]area 3
[R7-ospf-1-area-0.0.0.3]abr-summary 172.16.96.0 255.255.224.0
[R7]ip route-static 172.16.96.0 19 NULL 0
[R9]ospf 1
[R9-ospf-1]asbr-summary 172.16.128.0 255.255.224.0
[R9]ip route-static 172.16.128.0 19 NULL 0
[R12]ospf 1
[R12-ospf-1]asbr-summary 172.16.128.0 255.255.224.0
[R12]ip route-static 172.16.160.0 19 NULL 0
6.配置NAT
[R3]acl 2000
[R3-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R3-acl-basic-2000]int s4/0/0
[R3-Serial4/0/0]nat outbound 2000
[R5]acl 2000
[R5-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R5-acl-basic-2000]int s4/0/0
[R5-Serial4/0/0]nat outbound 2000
[R6]acl 2000
[R6-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R6-acl-basic-2000]int s4/0/0
[R6-Serial4/0/0]nat outbound 2000
[R7]acl 2000
[R7-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[R7-acl-basic-2000]int g0/0/0
[R7-GigabitEthernet0/0/0]nat outbound 2000
7.保证更新安全
[R1]ospf 1
[R1-ospf-1]area 1
[R1-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
[R2]ospf 1
[R2-ospf-1]area 1
[R2-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
[R3]ospf 1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
8.加快收敛
[R3]int Tunnel 0/0/0
[R3-Tunnel0/0/0]ospf timer hello 10
[R5]int Tunnel 0/0/0
[R5-Tunnel0/0/0]ospf timer hello 10
[R6]int Tunnel 0/0/0
[R6-Tunnel0/0/0]ospf timer hello 10
[R7]int Tunnel 0/0/0
[R7-Tunnel0/0/0]ospf timer hello 10
实验结果