TSM备份失败，无法进入管理控制台

# dsmadmc

IBM Tivoli Storage Manager

Command Line Administrative Interface - Version 6, Release 4, Level 0.0

(c) Copyright by IBM Corporation and other(s) 1990, 2012. All Rights Reserved.

Enter your user id:  admin

ANS1017E Session rejected: TCP/IP connection failure

ANS8023E Unable to establish session with server.

ANS8002I Highest return code was -50.

所有客户端无法备份，有大侠能给点建议不？