eNSP简介
这是一款由华为提供的免费的、可扩展的、图形化操作的网络仿真工具平台，主要对企业网络路由器、交换机进行软件仿真。 笔者刚刚使用，个人感觉紧密结合了计算机网络的理论知识，动手实操。
搭建拓扑图
点击左上角新建拓扑，选中路由器和PC机，连接拓扑图。注意：路由器建议选择AR2240型号（如下图所示）
这里我直接打开了.paper文件，里面有现成的拓扑图。自己连接也是很简单的。
任务
按标示配置IP地址AR1、AR2配置静态路由AR3配置缺省路由
配置静态路由-AR1
双击AR1打开命令行窗口
进入系统视图
<Huawei>system-view
[Huawei]sysname R1 \\命名路由器AR1为R1
进入AR1接口，由拓扑图得到，AR1 GE 0/0/1直连的网关是192.168.1.1/24
[R1]interface g0/0/1
[R1-GigabitEthernet0/0/1]ip address 192.168.1.1 24 \\192.168.1.1 24是PC1的网关
[R1-GigabitEthernet0/0/1]quit
[R1]
同理可得，AR1 GE 0/0/0
[R1]interface g0/0/0
[R1-GigabitEthernet0/0/0]ip address 10.1.12.1 24
[R1-GigabitEthernet0/0/0]quit
[R1]
AR1静态路由
ip route-static 192.168.2.0 24 10.1.12.2 \\192.168.2.0是指PC2处，24是指掩码数
###配置静态路由-AR2
进入系统视图、系统命名省略。配置GE 0/0/0和GE 0/0/1
[R2]interface g0/0/0
[R2-GigabitEthernet0/0/0]ip address 10.1.12.2 24
[R2-GigabitEthernet0/0/0]quit
[R2]interface g0/0/1
[R2-GigabitEthernet0/0/1]ip address 10.1.23.2 24
配置静态路由
[R2]ip route-static 192.168.1.0 24 10.1.12.1
[R2]ip route-static 192.168.2.0 24 10.1.23.3
配置缺省路由-AR3
AR3两个接口的配置
[R3]interface g0/0/1
[R3-GigabitEthernet0/0/1]ip address 192.168.2.1 24 !!!注意这里是192.168.2.1而不是192.168.2.10
[R3]interface g0/0/0
[R3-GigabitEthernet0/0/0]ip address 10.1.23.3 24
AR3缺省路由
[R3]ip route-static 0.0.0.0 0 10.1.23.2
查看AR3接口
[R3]display ip interface brief
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 3
The number of interface that is DOWN in Physical is 1
The number of interface that is UP in Protocol is 3
The number of interface that is DOWN in Protocol is 1
Interface IP Address/Mask Physical Protocol
GigabitEthernet0/0/0 10.1.23.3/24 up up
GigabitEthernet0/0/1 192.168.2.1/24 up up
GigabitEthernet0/0/2 unassigned down down
NULL0 unassigned up up(s)
查看AR3路由表 到达192.168.2.0/24的下一跳是192.168.2.10 缺省路由的下一跳是10.1.23.2
[R1]display ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 11 Routes : 11
Destination/Mask Proto Pre Cost Flags NextHop Interface
0.0.0.0/0 Static 60 0 RD 10.1.23.2 GigabitEthernet
0/0/0
10.1.23.0/24 Direct 0 0 D 10.1.23.3 GigabitEthernet
0/0/0
10.1.23.3/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
10.1.23.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
192.168.2.0/24 Direct 0 0 D 192.168.2.10 GigabitEthernet
0/0/1
192.168.2.10/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
192.168.2.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
查看AR2的路由表 到达192.168.1.0的下一跳是10.1.12.1 到达192.168.2.0的下一跳是10.1.23.3
[R2]display ip routing-table
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
Destinations : 12 Routes : 12
Destination/Mask Proto Pre Cost Flags NextHop Interface
10.1.12.0/24 Direct 0 0 D 10.1.12.2 GigabitEthernet
0/0/0
10.1.12.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
10.1.12.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/0
10.1.23.0/24 Direct 0 0 D 10.1.23.2 GigabitEthernet
0/0/1
10.1.23.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
10.1.23.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet
0/0/1
127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0
127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0
127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
192.168.1.0/24 Static 60 0 RD 10.1.12.1 GigabitEthernet
0/0/0
192.168.2.0/24 Static 60 0 RD 10.1.23.3 GigabitEthernet
0/0/1
255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0
验证
双击PC1或者PC2，在命令行ping对方的IP地址不报错就说明
