Configuration Fundamentals | 31
Layer 2 protocols are disabled by default. Enable them using the no disable command. For example, in 
PROTOCOL SPANNING TREE mode, enter 
no disable to enable Spanning Tree.
Obtaining Help 
Obtain a list of keywords and a brief functional description of those keywords at any CLI mode using the ? 
or 
help commands:
• Enter 
? at the prompt or after a keyword to list the keywords available in the current mode.
•
? after a prompt lists all of the available keywords. The output of this command is the same for the 
help command.
Figure 2-6.  ? Command Example
• ? after a partial keyword lists all of the keywords that begin with the specified letters.
Figure 2-7.  Keyword? Command Example
• A keyword followed by [space]? lists all of the keywords that can follow the specified keyword.
Figure 2-8.  Keyword ? Command Example
FTOS#?
start                   Start Shell
capture                 Capture Packet
cd                      Change current directory
clear                   Reset functions
clock                   Manage the system clock
configure               Configuring from terminal
copy                    Copy from one file to another
--More--
 “?” at prompt for list of commands
FTOS(conf)#cl?
class-map
clock
FTOS(conf)#cl
 partial keyword plus “[space]?” for matching keywords
FTOS(conf)#clock ?
summer-time             Configure summer (daylight savings) time
timezone                Configure time zone
FTOS(conf)#clock
keyword plus “[space]?” for compatible keywords