H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 54)

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5) After successful login, the CLI prompt (such as ) appears. If all the VTY user interfaces of
the switching engine are in use, you will fail to establish the connection and receive the message
that says “All user interfaces are used, please try later!”.
6) After successfully Telnetting to the switching engine, you can configure the switching engine or
display the information about the switching engine by executing corresponding commands. You
can also type ? at any time for help. Refer to the subsequent chapters for the information about the
commands.