HCIP-DATACOM核心网络技术(MGRE环境下的OSPF实验)
1.首先规划全局的IP地址
| 设备 | 接口 | IP地址 |
| R1 | G0/0/1 | 41.1.1.1/24 |
| G0/0/2 | 14.1.1.1/24 | |
| R2 | G0/0/2 | 24.1.1.2/24 |
| R3 | G0/0/2 | 34.1.1.3/24 |
| R4 | G0/0/0 | 41.1.1.4/24 |
| G2/0/0 | 14.1.1.4//24 | |
| G0/0/1 | 24.1.1.4/24 | |
| G0/0/2 | 34.1.1.4/24 | |
| G3/0/0 | 45.1.1.4/24 | |
| G4/0/0 | 46.1.1.4/24 | |
| R5 | G0/0/2 | 45.1.1.5/24 |
| R6 | G0/0/2 | 46.1.1.6/24 |
| 设备 | 地址 | 网关 |
| PC1 | 192.168.1.2/24 | 192.168.1.1/24 |
| PC2 | 192.168.2.2/24 | 192.168.2.1/24 |
| PC3 | 192.168.3.2/24 | 192.168.3.1/24 |
| PC4 | 192.168.4.2/24 | 192.168.4.1/24 |
| PC5 | 192.168.5.2/24 | 192.168.5.1/24 |
2.然后给每个设备配置IP地址
R1：
#
interface GigabitEthernet0/0/0
ip address 192.168.1.1 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 41.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/2
ip address 14.1.1.1 255.255.255.0
R2：
[R2]int g0/0/0
[R2-GigabitEthernet0/0/0]ip address 192.168.2.1 24
[R2-GigabitEthernet0/0/0]int g0/0/2
[R2-GigabitEthernet0/0/2]ip address 24.1.1.2 24
R3：
[R3]int g0/0/0
[R3-GigabitEthernet0/0/0]ip address 192.168.3.1 24
[R3-GigabitEthernet0/0/0]int g0/0/2
[R3-GigabitEthernet0/0/2]ip address 34.1.1.3 24
R4：
[R4]int g2/0/0
[R4-GigabitEthernet2/0/0]ip address 14.1.1.4 24
[R4-GigabitEthernet2/0/0]int g0/0/0
[R4-GigabitEthernet0/0/0]ip address 41.1.1.4 24
[R4-GigabitEthernet0/0/0]int g0/0/1
[R4-GigabitEthernet0/0/1]ip address 24.1.1.4 24
[R4-GigabitEthernet0/0/1]int g0/0/2
[R4-GigabitEthernet0/0/2]ip address 34.1.1.4 24
[R4-GigabitEthernet0/0/2]int g4/0/0
[R4-GigabitEthernet4/0/0]ip address 46.1.1.4 24
[R4-GigabitEthernet4/0/0]int g3/0/0
[R4-GigabitEthernet3/0/0]ip address 45.1.1.4 24[R4]int LoopBack0
[R4-LoopBack0]ip address 4.4.4.4 24
R5：
[R5]int g0/0/2
[R5-GigabitEthernet0/0/2]ip address 45.1.1.5 24
[R5]int g0/0/0
[R5-GigabitEthernet0/0/0]ip address 192.168.4.1 24
R6：
[R6]int g0/0/0
[R6-GigabitEthernet0/0/0]ip address 192.168.5.1 24
[R6-GigabitEthernet0/0/0]int g0/0/2
[R6-GigabitEthernet0/0/2]ip address 46.1.1.4 24
PC1:
PC2:
PC3:
PC4:
PC5:
3.再给R1、R2、R3、R5、R6配置缺省路由
R1：
ip route-static 0.0.0.0 0.0.0.0 14.1.1.4
ip route-static 0.0.0.0 0.0.0.0 41.1.1.4
R2:
[R2]ip route-static 0.0.0.0 0 24.1.1.4
R3:
[R3]ip route-static 0.0.0.0 0 34.1.1.4
R5:
[R5]ip route-static 0.0.0.0 0 45.1.1.4
R6:
[R6]ip route-static 0.0.0.0 0 46.1.1.4
4.使用ACL抓取流量，再用NAT技术进行地址转换
R1:
[R1]acl 2000
[R1-acl-basic-2000]rule permit source any
[R1]int g0/0/2
[R1-GigabitEthernet0/0/2]nat outbound 2000[R1]int g0/0/1
[R1-GigabitEthernet0/0/1]nat outbound 2000
R2:
[R2]acl 2000
[R2-acl-basic-2000]rule permit source any
[R2]int g0/0/2
[R2-GigabitEthernet0/0/2]nat outbound 2000
R3:
[R3]acl 2000
[R3-acl-basic-2000]rule permit source any
[R3-acl-basic-2000]q
[R3]int g0/0/2
[R3-GigabitEthernet0/0/2]nat outbound 2000
R5:
[R5]acl 2000
[R5-acl-basic-2000]rule permit source any
[R5-acl-basic-2000]q
[R5]int g0/0/2
[R5-GigabitEthernet0/0/2]nat outbound 2000
R6:
[R6]acl 2000
[R6-acl-basic-2000]rule pe
[R6-acl-basic-2000]rule permit source any
[R6-acl-basic-2000]q
[R6]int g0/0/2
[R6-GigabitEthernet0/0/2]nat outbound 2000
5.给R1-R2-R3构建一个星型结构的MGRE结构，其中R1为中心点
R1为中心站点：
[R1]interface Tunnel0/0/0
[R1-Tunnel0/0/0]ip address 10.1.1.1 255.255.255.0
[R1-Tunnel0/0/0]tunnel-protocol gre p2mp
[R1-Tunnel0/0/0]source 14.1.1.1
[R1-Tunnel0/0/0]nhrp network-id 100
R2分支站点：
[R2]int t0/0/0
[R2-Tunnel0/0/0]ip address 10.1.1.2 24
[R2-Tunnel0/0/0]tunnel-protocol gre p2mp
[R2-Tunnel0/0/0]source g0/0/2
[R2-Tunnel0/0/0]nhrp network-id 100
[R2-Tunnel0/0/0]nhrp entry 10.1.1.1 14.1.1.1 register
R3分支站点：
[R3]int t0/0/0
[R3-Tunnel0/0/0]ip address 10.1.1.3 24
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp
[R3-Tunnel0/0/0]source g0/0/2
[R3-Tunnel0/0/0]nhrp network-id 100
[R3-Tunnel0/0/0]nhrp entry 10.1.1.1 14.1.1.1 register
6.给R1-R5-R6 构建另一个全连网状的MGRE网络，其中R1/R5均为中心区域;
R1：
[R1]int t0/0/1
[R1-Tunnel0/0/1]ip address 20.1.1.1 24
[R1-Tunnel0/0/1]tunnel-protocol gre p2mp
[R1-Tunnel0/0/1]source 41.1.1.1
[R1-Tunnel0/0/1]nhrp network-id 101
[R1-Tunnel0/0/1]nhrp entry 20.1.1.5 45.1.1.5 register
R5：
[R5]int t0/0/1
[R5-Tunnel0/0/1]ip address 20.1.1.5 24
[R5-Tunnel0/0/1]tunnel-protocol gre p2mp
[R5-Tunnel0/0/1]source 41.1.1.5
[R5-Tunnel0/0/1]nhrp network-id 101
[R5-Tunnel0/0/1]nhrp entry 20.1.1.1 41.1.1.1 register
R6：
[R6]int t0/0/1
[R6-Tunnel0/0/1]ip address 20.1.1.6 24
[R6-Tunnel0/0/1]tunnel-protocol gre p2mp
[R6-Tunnel0/0/1]source g0/0/2
[R6-Tunnel0/0/1]nhrp network-id 101
[R6-Tunnel0/0/1]nhrp entry 20.1.1.1 41.1.1.1 register
[R6-Tunnel0/0/1]nhrp entry 20.1.1.5 45.1.1.5 register
7.给R1、R2、R3、R5、R6配置OSPF路由
R1：
[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]area 0.0.0.0
[R1-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
[R1-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
[R1-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255
注意：在MGRE环境下OSPF要在中心站点关闭伪广播，使其ospf路由传给分支站点
[R1]interface Tunnel0/0/0
[R1-Tunnel0/0/0]nhrp entry multicast dynamic
[R1]interface Tunnel0/0/1
[R1-Tunnel0/0/1]nhrp entry multicast dynamic
R2：
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255
[R2-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
R3：
[R3]ospf 1
[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 192.168.3.0 0.0.0.255
[R3-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
R5：
[R5]ospf 1 router-id 5.5.5.5
[R5-ospf-1]area 0
[R5-ospf-1-area-0.0.0.0]network 192.168.4.0 0.0.0.255
[R5-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
R6：
[R6]ospf 1 router-id 6.6.6.6
[R6-ospf-1]area 0
[R6-ospf-1-area-0.0.0.0]network 192.168.5.0 0.0.0.255
[R6-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
注意：在ospf下Tunnel口的网络类型为点到点链路，所以要把网络类型改为broadcast
[R1]interface Tunnel0/0/0
[R1-Tunnel0/0/0] ospf network-type broadcast
[R1]interface Tunnel0/0/1
[R1-Tunnel0/0/1] ospf network-type broadcast
[R2]int t0/0/0
[R2-Tunnel0/0/0]ospf network-type broadcast
[R3]int t0/0/0
[R3-Tunnel0/0/0]ospf network-type broadcast
[R5]int t0/0/1
[R3-Tunnel0/0/0]ospf network-type broadcast
[R6]int t0/0/1
[R6-Tunnel0/0/1]ospf network-type broadcast
8.测试：互相进行PING
PC2：
PC3:
PC4:
PC5:
