Ensp模拟通过本机（windows）用python脚本批量配置华为数通设备时，为了避免对内网资源的浪费最好用回环口（loopback）。
一、windows开启loopback虚拟接口
概要：
right click on window start menu icon and select Device manager.
click on Action, and select Add legacy hardware （该菜单项或许不会立即显示，要稍后才会显示）
click Next on welcome screen
choose “Install the hardware that i manually select from a list” and click on Next
scroll down and select Network adapters from offered common hardware types and click on Next
select Microsoft as the manufacturer, and then select Microsoft KM-TEST Loopback adapter card model, click on Next
click on Next
click on Finish
详细步骤及截图
1、windows+r键运行hdwwiz
2、添加新硬件
下一步
3、搜索并自动安装硬件
4、找到网络适配器，下一步
5、厂商选择Microsoft，型号选择换回适配器
6、完成，重启电脑生效。
重启电脑后，打开ensp-cloud就可以看到环回网卡了
二、 用windows回环口连接cloud配置
如下图设置，相当于本机电脑的回环网卡连接到了cloud，进而可以在本机通过cli对ensp中的网络设备进行配置，这种连接配置方式为桥接模式。
需注意：下图中169.254.16.38是本机电脑的回环口ip，并不是cloud的ip，cloud只是桥梁
1、配置Cloud所连设备
<Huawei>sys
Enter system view, return user view with Ctrl+Z.
[Huawei]un in en
Info: Information center is disabled.
[Huawei]int vlanif 399
Error: The VLAN does not exist.
[Huawei]vlan 399
[Huawei-vlan399]q
[Huawei]int vlanif 399
[Huawei-Vlanif399]ip add 169.254.16.10 16
[Huawei-Vlanif399]q
[Huawei]int gi 0/0/1
[Huawei-GigabitEthernet0/0/1]port link-type access
[Huawei-GigabitEthernet0/0/1]port default vlan 399
[Huawei-GigabitEthernet0/0/1]q
[Huawei]
[Huawei]stelnet server enable
Info: Succeeded in starting the Stelnet server.
[Huawei]ssh user liulinfeng authentication-type password
Info: Succeeded in adding a new SSH user.
[Huawei]ssh user liulinfeng service-type stelnet
[Huawei]aaa
[Huawei-aaa]local-user liulinfeng password cipher Huawei@123
Info: Add a new user.
[Huawei-aaa]local-user liulinfeng privilege level 15
[Huawei-aaa]local-user liulinfeng service-type ssh
[Huawei-aaa]user-interface vty 0 4
[Huawei-ui-vty0-4]authentication-mode aaa
[Huawei-ui-vty0-4]protocol inbound ssh
[Huawei-ui-vty0-4]q2、验证本机电脑与ensp中网络设备的连通性
3、通过cloud用电脑ssh登录ensp网络设备
通过windows的cmd访问报错
Microsoft Windows [版本 10.0.22621.819]
(c) Microsoft Corporation。保留所有权利。C:\Users\liulinfeng>ssh 169.254.16.10
Unable to negotiate with 169.254.16.10 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha1C:\Users\liulinfeng>ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 169.254.16.10
Unable to negotiate with 169.254.16.10 port 22: no matching cipher found. Their offer: aes128-cbc,3des-cbc,des-cbcC:\Users\liulinfeng>ssh -oKexAlgorithms=+diffie-hellman-group1-sha1=+aes128-cbc=+3des-cbc=+dec-cbc 169.254.16.10
command-line line 0: garbage at end of line; "+aes128-cbc".C:\Users\liulinfeng>ensp虚拟的网络设备参数不全，报错正常。
用ssh工具登录可以成功，如下：
登录成功。
