Cisco Systems A9K24X10GETR Configuring Logging and Logging Correlation, logging console, 4-12

Chapter 4 Configuring Additional Router Features

Configuring Logging and Logging Correlation

F I N A L D R A F T — C i s c o C o n f i d e n t i a l

Configuring Logging and Logging Correlation

System messages generated by the Cisco IOS XR software can be logged to a variety of locations based on the severity level of the messages. For example, you could direct information messages to the system console and also log debugging messages to a network server.

In addition, you can define correlation rules that group and summarize related events, generate complex queries for the list of logged events, and retrieve logging events through an XML interface.

The following sections describe logging and the basic commands used to log messages in

Cisco IOS XR software:

•Logging Locations and Severity Levels, page 4-12

•Alarm Logging Correlation, page 4-13

•Configuring Basic Message Logging, page 4-13

•Disabling Console Logging, page 4-15

Logging Locations and Severity Levels

Error messages can be logged to a variety of locations, as shown in Table 4-1.

Table 4-1	Logging Locations for System Error Messages
Logging Destination		Command (Global Configuration Mode)
console		logging console
vty terminal		logging monitor
external syslog server		logging trap
internal buffer		logging buffered

You can log messages based on the severity level of the messages, as shown in Table 4-2.

Table 4-2	Logging Severity Levels for System Error Messages
Level		Description
Level 0—Emergencies		System has become unusable.
Level 1—Alerts		Immediate action needed to restore system stability.
Level 2—Critical		Critical conditions that may require attention.
Level 3—Errors		Error conditions that may help track problems.
Level 4—Warnings		Warning conditions that are not severe.
Level 5—Notifications		Normal but significant conditions that bear notification.
Level 6—Informational		Informational messages that do not require action.
Level 7—Debugging		Debugging messages are for system troubleshooting only.

	Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
4-12	OL-17502-01