A-7
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Appendix A Cisco IOS CLI for Initial Configuration
Using the Cisco IOS CLI to Perform Initial Configuration
DETAILED STEPS
Command or Action Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
show ip interface brief
Example:
Router# show ip interface brief
Displays a brief status of the interfaces that are configured
for IP.
• Learn which type of Ethernet interface is on your
router.
Step 3
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 4
interface gigabitethernet 0/port
Example:
Router(config)# interface gigabitethernet 0/0
Specifies the gigabit Ethernet interface and enters interface
configuration mode.
Note For information on interface numbering, see
Software Configuration Guide.
Step 5
description string
Example:
Router(config-if)# description GE int to 2nd
floor south wing
(Optional) Adds a description to an interface configuration.
• The description helps you remember what is attached to
this interface. The description can be useful for
troubleshooting.
Step 6
ip address ip-address mask
Example:
Router(config-if)# ip address 172.16.74.3
255.255.255.0
Sets a primary IP address for an interface.
Step 7
no shutdown
Example:
Router(config-if)# no shutdown
Enables an interface.
Step 8
end
Example:
Router(config)# end
Returns to privileged EXEC mode.
Step 9
show ip interface brief
Example:
Router# show ip interface brief
Displays a brief status of the interfaces that are configured
for IP.
• Verify that the Ethernet interfaces are up and
configured correctly.
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