Chapter 3 Configuring Additional Router Features

Configuring Logging and Logging Correlation

 

Command or Action

Purpose

Step 4

 

 

logging console [severity]

Logs messages on the console.

 

 

When a severity level is specified, only

 

Example:

messages at that severity level are logged on

 

RP/0/RP0/CPU0:router(config)# logging console

the console.

 

emergencies

See Table 3-2for a summary of the logging

 

 

 

 

severity levels.

Step 5

 

 

logging buffered [severity buffer-size]

Copies logging messages to an internal buffer.

 

 

Newer messages overwrite older messages

 

Example:

after the buffer is filled.

 

RP/0/RP0/CPU0:router(config)# logging buffered 1000000

Specifying a severity level causes messages at

 

 

that level and numerically lower levels to be

 

 

logged in an internal buffer. See Table 3-2for

 

 

a summary of the logging severity levels.

 

 

The buffer size is from 4096 to

 

 

4,294,967,295 bytes. Messages above the set

 

 

limit are logged to the console.

Step 6

 

 

commit

Commits the target configuration to the router

 

 

running configuration.

 

Example:

 

 

RP/0/RP0/CPU0:router(config)# commit

 

Step 7

 

 

end

Ends the configuration session and returns to

 

 

EXEC mode.

 

Example:

 

 

RP/0/RP0/CPU0:router(config)# end

 

Step 8

 

 

show logging

Displays the messages that are logged in the

 

 

buffer.

 

Example:

 

 

RP/0/RP0/CPU0:router# show logging

 

 

 

 

Examples

In the following example, basic message logging is configured:

RP/0/RP0/CPU0:router# config

RP/0/RP0/CPU0:router(config)# logging 10.1.1.1

RP/0/RP0/CPU0:router(config)# logging trap debugging

RP/0/RP0/CPU0:router(config)# logging console emergencies

RP/0/RP0/CPU0:router(config)# logging buffered 1000000

RP/0/RP0/CPU0:router(config)# commit

RP/0/RP0/CPU0:router(config)# end

RP/0/RP0/CPU0:router# show logging

Syslog logging: enabled (10 messages dropped, 0 flushes, 0 overruns)

Console logging: level debugging, 103 messages logged

Monitor logging: level debugging, 0 messages logged

Trap logging: level informational, 0 messages logged

Buffer logging: level debugging, 107 messages logged

Log Buffer (16384 bytes):

Cisco IOS XR Getting Started Guide

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Cisco Systems IOS XR Logs messages on the console, When a severity level is specified, only, After the buffer is filled

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.