Chapter 3 Configuring Additional Router Features

Managing Configuration History and Rollback

The commitIDs are shown in the “Label/ID” column. The following example shows the

show configuration commit list command display:

RP/0/RP0/CPU0:router# show configuration commit list

SNo.

Label/ID

User

Line

Client

Time Stamp

~~~~

~~~~~~~~

~~~~

~~~~

~~~~~~

~~~~~~~~~~

1

1000000391

user_a

con0_33_1

CLI

19:29:18 UTC Wed Jan 10 2004

2

1000000390

user_a

con0_33_1

CLI

19:29:16 UTC Wed Jan 10 2004

3

1000000389

user_a

con0_33_1

CLI

19:29:15 UTC Wed Jan 10 2004

4

1000000388

user_a

con0_33_1

CLI

19:29:12 UTC Wed Jan 10 2004

5

1000000387

user_a

con0_33_1

CLI

19:26:16 UTC Wed Jan 10 2004

6

1000000386

user_a

con0_32_1

CLI

19:18:38 UTC Wed Jan 10 2004

7

1000000385

user_a

con0_33_1

CLI

19:14:09 UTC Wed Jan 10 2004

8

1000000384

user_a

con0_33_1

CLI

19:13:58 UTC Wed Jan 10 2004

9

1000000383

user_a

con0_33_1

CLI

19:13:33 UTC Wed Jan 10 2004

10

1000000382

user_a

con0_33_1

CLI

19:12:50 UTC Wed Jan 10 2004

11

1000000381

user_a

con0_33_1

CLI

19:12:48 UTC Wed Jan 10 2004

12

1000000380

user_a

con0_33_1

CLI

19:12:46 UTC Wed Jan 10 2004

13

1000000379

user_a

con0_33_1

CLI

19:12:43 UTC Wed Jan 10 2004

14

1000000378

user_a

con0_33_1

CLI

19:12:14 UTC Wed Jan 10 2004

15

1000000377

user_a

con0_33_1

CLI

19:10:47 UTC Wed Jan 10 2004

Displaying the Configuration History Log

To display the header records for up to 1000 commit events, enter the show configuration commit history command in EXEC mode, as shown in the following example.

The output from this command does not show the details of the entries, but allows you to display a larger list of the commit events that occurred. To display the commitIDs to which you can roll back, use the show configuration commit list command.

Cisco IOS XR Getting Started Guide

3-5

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Image 5
Cisco Systems IOS XR manual Displaying the Configuration History Log, Show configuration commit list command display

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.