3com 4210 PWR 9-Port 3CR17341-91-ME 用户手册

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HAPTER

 1: CLI C

ONFIGURATION

commands and execute them again. By default, the CLI stores up to 10 most 
recently executed commands for each user. You can view the command history by 
performing the operations listed in Table 6.

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The Windows 9x HyperTerminal defines the up and down arrow keys in a 
different way, and therefore the two keys are invalid when you access history 
commands in such an environment. However, you can use <Ctrl+ P> and 
<Ctrl+ N> instead to achieve the same purpose.

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When you enter the same command multiple times consecutively, only one 
history command entry is stored in the CLI.

If a command passes the syntax check, it is executed; otherwise, an error message 
displays. Table 7 lists the most common error messages.

The CLI provides basic command edit functions and supports multi-line editing. 
The maximum number of characters a command can contain is 254. Table 8 lists 
the CLI edit operations.

Table 6   View history commands

Display the latest executed 
history commands 

Execute the display 
history-command command 

This command displays the 
command history. 

Recall the previous history 
command 

Press the up arrow key or 
<Ctrl+P> 

This operation recalls the 
previous history command (if 
available). 

Recall the next history 
command 

Pressing the down arrow key 
or <Ctrl+N> 

This operation recalls the next 
history command (if 
available).

Table 7   Common error messages

Unrecognized command 

The command does not exist. 

The keyword does not exist. 

The parameter type is wrong. 

The parameter value is out of range. 

Incomplete command 

The command entered is incomplete. 

Too many parameters 

You entered too many parameters. 

Ambiguous command 

The parameters entered are ambiguous. 

Wrong parameter 

A parameter entered is wrong. 

found at’^’ position 

An error is found at the ’^’ position.

Table 8   Edit operations

A common key 

Insert the corresponding character at the cursor position 
and move the cursor one character to the right if the 
command is shorter than 254 characters. 

Backspace key 

Delete the character on the left of the cursor and move 
the cursor one character to the left. 

Left arrow key or <Ctrl+B> 

Move the cursor one character to the left.