Adding A Description For An Interface; Configuring Layer 3 Interfaces - Cisco 3845 - Security Bundle Router Software Manual

Chapter 9 Configuring Interfaces
Switch(config-if)# end

Adding a Description for an Interface

You can add a description about an interface to help you remember its function. The description appears
in the output of these privileged EXEC commands: show configuration
show interfaces.
Beginning in privileged EXEC mode, follow these steps to add a description for an interface:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3 description string
Step 4 end
Step 5 show interfaces interface-id description
or
show running-config
Step 6 copy running-config startup-config
Use the no description interface configuration command to delete the description.
This example shows how to add a description on a port and how to verify the description:
Switch# config terminal
Enter configuration commands, one per line.
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# description Connects to Marketing
Switch(config-if)# end
Switch# show interfaces gigabitethernet0/2 description
Interface Status
Gi 0/2

Configuring Layer 3 Interfaces

The switch supports these types of Layer 3 interfaces:
•
•
OL-23400-01
Protocol Description
admin down down
SVIs: You should configure SVIs for any VLANs for which you want to route traffic. SVIs are
created when you enter a VLAN ID following the interface vlan global configuration command. To
delete an SVI, use the no interface vlan global configuration command. You cannot delete interface
VLAN 1.
When you create an SVI, it does not become active until it is associated with a physical port.
Note
For information about assigning Layer 2 ports to VLANs, see
VLANs."
Routed ports: Routed ports are physical ports configured to be in Layer 3 mode by using the no
switchport interface configuration command.
Purpose
Enter global configuration mode.
Specify the interface for which you are adding a description, and enter
interface configuration mode.
Add a description (up to 240 characters) for an interface.
Return to privileged EXEC mode.
Verify your entry.
(Optional) Save your entries in the configuration file.
End with CNTL/Z.
Connects to Marketing
Cisco ME 3800X and 3600X Switch Software Configuration Guide
Configuring Layer 3 Interfaces
, ,
show running-config and
Chapter 10, "Configuring
9-19