实验拓扑：
1、网络互通
2、配置路由器
[AR1]ftp server enable
Info: Succeeded in starting the FTP server
[AR1]aaa
[AR1-aaa]local-user ftp password cipher huawei
Info: Add a new user.
[AR1-aaa]local-user ftp ftp-directory flash:
[AR1-aaa]local-user ftp service-type ftp
[AR1-aaa]local-user ftp privilege level 15
3、client测试