Chapter 3 Configuring Additional Router Features

Managing Configuration History and Rollback

RP/0/RP0/CPU0:router# show

configuration commit history

SNo. Label/ID

User

Line

Client

Time Stamp

~~~~

~~~~~~~~

~~~~

~~~~

~~~~~~

~~~~~~~~~~

1

1000000144

user_a

vty0

CLI

00:16:51 UTC Thu May 11 2004

2

1000000143

user_a

vty0

CLI

00:04:32 UTC Thu May 11 2004

3

1000000142

user_a

0.0.0.0

XMLAgent

21:58:36 UTC Wed May 11 2004

4

1000000141

user_a

0.0.0.0

XMLAgent

21:46:07 UTC Wed May 11 2004

5

1000000140

user_b

con0_RP1_C

CLI

21:43:30 UTC Wed May 11 2004

6

1000000139

user_a

0.0.0.0

XMLAgent

21:40:13 UTC Wed May 11 2004

7

1000000138

user_a

0.0.0.0

XMLAgent

21:34:48 UTC Wed May 11 2004

8

1000000137

user_b

con0_RP1_C

CLI

21:32:10 UTC Wed May 11 2004

9

1000000136

user_a

0.0.0.0

XMLAgent

21:30:13 UTC Wed May 11 2004

10

1000000135

user_b

con0_RP1_C CLI

19:45:04 UTC Wed May 11 2004

11

1000000134

user_b

con0_RP1_C CLI

19:37:26 UTC Wed May 11 2004

12

1000000133

user_b

con0_RP1_C CLI

19:36:27 UTC Wed May 11 2004

13

1000000132

user_b

con0_33_1

Rollback

18:34:45 UTC Wed May 11 2004

14

1000000131

user_b

con0_33_1

Rollback

18:32:37 UTC Wed May 11 2004

15

1000000130

user_b

con0_33_1

Rollback

18:31:09 UTC Wed May 11 2004

16

1000000129

user_b

con0_33_1

CLI

18:28:12 UTC Wed May 11 2004

17

1000000128

user_b

con0_33_1

CLI

18:27:22 UTC Wed May 11 2004

18

1000000127

user_b

con0_33_1

CLI

18:27:19 UTC Wed May 11 2004

19

1000000126

user_b

con0_33_1

Rollback

18:25:55 UTC Wed May 11 2004

20

1000000125

user_b

con0_33_1

Rollback

18:24:25 UTC Wed May 11 2004

Displaying the Configuration Changes Recorded in a CommitID

To display the configuration changes made during a specific commit session (commitID), enter the show configuration commit changes command followed by a commitID number, as shown in the following example:

RP/0/0/CPU0:router# show configuration commit changes 1000000071

Building configuration...

hostname router2 end

Previewing Rollback Configuration Changes

The show configuration rollback changes command allows you to preview the configuration changes that take place if you roll back the configuration to a specific commitID. For example, if you want to roll back the configuration to a specific point, all configuration changes made after that point must be undone. This rollback process is often accomplished by executing the “no” version of commands that must be undone.

Cisco IOS XR Getting Started Guide

3-6

Page 6
Image 6
Cisco Systems IOS XR manual Displaying the Configuration Changes Recorded in a CommitID, Configuration commit history

IOS XR specifications

Cisco Systems IOS XR is an advanced operating system designed specifically for high-performance routers and service provider networks. It serves as the backbone for many of Cisco's high-end routing platforms, enabling service providers to manage their networks with increased efficiency, flexibility, and scalability.

One of the main features of IOS XR is its modular architecture. This allows for the independent operation of various components within the OS, facilitating the deployment of new features and updates without affecting the overall stability of the system. This modularity ensures that service providers can implement rapid changes and enhancements while maintaining service continuity.

Another characteristic of IOS XR is its support for 64-bit architecture, which provides enhanced performance and the ability to manage larger amounts of data. This is particularly beneficial for service providers that deal with high traffic volumes and require robust data processing capabilities. The utilization of 64-bit technology also enables the operating system to utilize memory more efficiently, allowing for greater scalability.

IOS XR incorporates advanced technologies such as Distributed System Architecture (DSA) and Multiple Routing Instances (Merging Routes). DSA allows for the distribution of routing processes across multiple hardware resources, maximizing performance and redundancy. Multiple Routing Instances enable operators to create separate logical routing tables for different services, improving isolation and efficiency in managing network traffic.

The operating system also focuses heavily on security, featuring extensive encryption methods and access controls to safeguard network resources. IOS XR supports various authentication protocols, ensuring secure access to routers and switches. In addition, the OS includes comprehensive logging and monitoring capabilities, allowing network administrators to track activities and respond quickly to potential threats.

Another critical aspect of IOS XR is its adherence to the principles of service-oriented architecture (SOA). This approach permits the development of applications and services that can operate independently, fostering innovation and enabling service providers to tailor their offerings based on customer demands.

Ultimately, Cisco IOS XR is a powerful, reliable operating system that meets the complex needs of modern telecommunications networks. With its focus on modularity, performance, security, and scalability, it enables service providers to deliver high-quality, resilient services to their customers while efficiently managing network resources. As the industry continues to evolve, IOS XR remains a vital tool for those aiming to stay competitive in the ever-changing landscape of networking.