show running-config
CF-870
Cisco IOS Configuration Fundamentals Command Reference
July 2008
Command Default The default syntax, show running-config, displays the contents of the running configuration file, except
commands configured with default parameters.
Command Modes User EXEC (>)
Privileged EXEC (#)
Command History
Usage Guidelines The show running-config command is technically a command alias (substitute or replacement syntax)
of the more system:running-config command. Although more commands are recommended (due to
their uniform structure across platforms and their expandable syntax), the show running-config
command remains enabled to accommodate its widespread use, and to allow typing shortcuts such as
show run.
The show running-config interface command is useful when there are multiple interfaces and you want
to look at the configuration of a specific interface.
The linenum keyword causes line numbers to be displayed in the output. This option is useful for
identifying a particular portion of a very large configuration.
You can enter additional output modifiers in the command syntax by including a pipe character (|) after
the optional keyword. For example, show running-config interface serial 2/1 linenum | begin 3. To
display output modifiers that are available for a keyword, enter | ? after the keyword.
Prior to Cisco IOS Release 12.2(33)SXH, show running-config command output omitted configuration
commands set with default values. Effective with Release 12.2(33)SXH, the show running-config all
command displays more complete configuration information, including default settings and values. For
example, if the Cisco Discovery Protocol (abbreviated as CDP in the output) holdtime value is set to its
default of 180:
Release Modification
11.0 This command was introduced.
12.0 This command was replaced by the more system:running-config command.
12.0(1)T This command was integrated into Cisco IOS Release 12.0(1)T, and the
output modifier (|) was added.
12.2(4)T The linenum keyword was added.
12.3(8)T The view full option was added.
12.2(14)SX This command was integrated into Cisco IOS Release 12.2(14)SX. The
module number and vlan vlan-id keywords and arguments were added for
the Supervisor Engine 720.
12.2(17d)SXB This command was integrated into Release 12.2(17d)SXB and implemented
on the Supervisor Engine 2.
12.2(33)SXH The all keyword was added.
12.2(31)SB2 This command was integrated into Cisco IOS Release 12.2(31)SB2. This
command was enhanced to display configuration information for traffic
shaping overhead accounting for ATM and was implemented on the
Cisco 10000 series router for the PRE3.
12.2(33)SRC This command was integrated into Cisco IOS Release 12.2(33)SRC.
12.2(33)SB Support for the Cisco 7300 series router was added.
