Cisco CRS-1 - Carrier Routing System Router Getting Started Guide

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Cisco CRS-1 Series Carrier Routing System Getting Started Guide
Chapter 2 Cisco IOS XR Basic Configuration Management
Configuration History and Rollback
To display the current configuration sessions, enter the show configuration sessions command in EXEC
mode. Exclusive configuration sessions are noted by an asterisk (*), as shown in the following example:
RP/0/RP0/CPU0:router# show configuration sessions
Session Line User Date Lock
00000000-000650a4-00000000 dummy_line root Thu Oct 3 12:20:12 2003
00000000-0006a0a3-00000000 dummy_line root Thu Oct 3 12:24:23 2003 *
To lock the running configuration so that other users cannot commit changes while your configuration
session is active, enter the configure exclusive command:
RP/0/RP0/CPU0:router# configure exclusive
RP/0/RP0/CPU0:router(config)#
The running configuration is unlocked when the user who entered the configuration mode using the
configure exclusive command exits the configuration mode:
RP/0/RP0/CPU0:router(config)# exit
Configuration History and Rollback
After each commit operation, a record is saved of the configuration that was replaced. Each record is
assigned a unique ID, known as a commitID. The commitIDs represent the rollback points that allow you
to revert to a previous configuration.
The Cisco IOS XR software automatically saves up to 100 of the most recent commitIDs. The following
sections describe how to display configuration changes and how to roll back to a previously committed
configuration:
• Displaying the Rollback Points, page 2-24
• Rolling Back the Configuration to a Specific Rollback Point, page 2-25
• Rolling Back the Configuration to a Specified Number of Commits, page 2-25
• Displaying the Configuration History Log, page 2-26
• Configuration Change Notification, page 2-26
Table 2-10 summarizes the commands used to display the commit history and roll back to a previous
configuration.
configure exclusive Enters global configuration mode and denies other users the ability to
commit changes while your configuration session is active. Other
users can still enter global configuration mode and populate a target
configuration, but they cannot commit those changes to the running
configuration until you exit your exclusive configuration session.
Note If the configuration is already locked by another user, the
configure exclusive command fails.
exit or end Unlocks the other configuration sessions by ending your configuration
session and returning to EXEC mode.
Table 2-9 Configuration Session Commands (continued)
Command Description

Cisco CRS-1 - Carrier Routing System Router Specifications

General

Brand	Cisco
Model	CRS-1 - Carrier Routing System Router
Category	Network Router
Language	English