H3C S3600 telnet登录失败

配置如下：

#

 domain default enable h3c

radius scheme system

radius scheme h3c

 server-type extended

 primary authentication xxx.xxx.xxx.xxx

 primary accounting xxx.xxx.xxx.xxx

 secondary authentication xxx.xxx.xxx.xxx

 secondary accounting xxx.xxx.xxx.xxx

 key authentication h3c

 key accounting h3c

 user-name-format without-domain

 nas-ip xxx

domain h3c                                

 scheme radius-scheme h3c

 authentication radius-scheme h3c

 accounting radius-scheme h3c

domain system

#

local-user admin

 password simple admin

 service-type ssh telnet

 level 3

 telnet source-ip xxx.xxx.xxx.xxx

 ssh authentication-type default all

 ssh server timeout 120

 ssh user xxxxx authentication-type password

 ssh user xxxxx service-type stelnet

#

user-interface aux 0 7

user-interface vty 0 1

 authentication-mode scheme

 protocol inbound telnet

user-interface vty 2 4

 authentication-mode none

通过远程或本地的方式telnet登录，均能够输入用户名和密码，但会提示login failed。我确定账号密码是正确的。请问是什么情况？

是因为domain设置导致telnet和ssh登录去服务器上认证么？