3Com S7906E - Switch, Configuration Manual

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If you execute the same command repeatedly, the device saves only the earliest command.
However, if you execute the same command in different formats, the system considers them as
different commands. For example, if you execute the display cu command repeatedly, the system
saves only one command in the history buffer; if you execute the command in the format of display
cu and display current-configuration respectively, the system saves them as two commands.
Follow these steps to access history commands:
To do… Use the key/command… Result
View the history commands display history-command
Displays the commands that
you have entered
Access the previous history
command
Up-arrow key or Ctrl+P
Displays the earlier history
command, if there is any.
Access the next history
command
Down-arrow key or Ctrl+N
Displays the next history
command, if there is any.
You may use arrow keys to access history commands in Windows 200X and XP Terminal or Telnet.
However, the up-arrow and down-arrow keys are invalid in Windows 9X HyperTerminal, because they
are defined in a different way. You can press Ctrl+P or Ctrl+N instead.
Command Line Error Information
The commands are executed only if they have no syntax error. Otherwise, error information is reported.
Table 1-7 lists some common errors.
Table 1-7 Common command line errors
Error information Cause
The command was not found.
The keyword was not found.
Parameter type error
% Unrecognized command found at '^' position.
The parameter value is beyond the allowed
range.
% Incomplete command found at '^' position. Incomplete command
% Ambiguous command found at '^' position. Ambiguous command,
Too many parameters Too many parameters
% Wrong parameter found at '^' position. Wrong parameter