第一种方式：密码认证
[H3C]ssh server enable

[H3C]local-user h3c class manage
New local user added.
[H3C-luser-manage-h3c]pa
[H3C-luser-manage-h3c]password si
[H3C-luser-manage-h3c]password simple 123
[H3C-luser-manage-h3c]service-type ssh

[H3C]user-interface vty 0 4
[H3C-line-vty0-4]authentication-mode scheme
[H3C-line-vty0-4]protocol inbound ssh