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Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
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Chapter 3 Configuring General Router Features
Managing Configuration Sessions
Starting a Configuration Session
When you place the router in global configuration or administration configuration mode using the
configure command, a new target configuration session is created. The target configuration allows you
to enter, review, and verify configuration changes without impacting the running configuration.
Note The target configuration is not a copy of the running configuration. It has only the configuration
commands entered during the target configuration session.
While in configuration mode, you can enter all Cisco IOS XR Software commands supported in that
configuration mode. Each command is added to the target configuration. You can view the target
configuration by entering the show configuration command in configuration mode. The target
configuration is not applied until you type the commit command, as described in the “Committing
Changes to the Running Configuration” section on page 3-27.
You can save target configurations to disk as nonactive configuration files. These saved files can be
loaded, further modified, and committed at a later time. For more information, see the “Saving the Target
Configuration to a File” section on page 3-26.
Examples
The following examples show how to manage configuration sessions:
• Simple RSP Configuration: Example, page 3-20
• Simple Administration Configuration Session: Example, page 3-20

Simple RSP Configuration: Example

This example shows a simple owner RSP configuration session in which the target configuration is
created and previewed in global configuration mode:
RP/0/RSP0/CPU0:router # configure
RP/0/RSP0/CPU0:router(config)# interface tunnel-te 2
RP/0/RSP0/CPU0:router(config-if)# show configuration
Building configuration...
interface tunnel-te2
description faq
!
end

Simple Administration Configuration Session: Example

The following example shows a simple administration configuration session in which the target
configuration is created and previewed in administration configuration mode:
RP/0/RSP0/CPU0:router# admin
RP/0/RSP0/CPU0:router(admin)# configure
RP/0/RSP0/CPU0:router(admin-config)# sdr test
RP/0/RSP0/CPU0:router(admin-config-sdr:test)# location 0/1/CPU0
RP/0/RSP0/CPU0:router(admin-config-sdr:test)# show configuration
Building configuration...
sdr test
location 0/1/CPU0
!