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Cisco IOS XR Getting Started Guide
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Chapter5 Configuring Additional Router Features
Configuring Logging and Logging Correlation
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 5-114
•Alarm Logging Correlation, page 5-115
•Configuring Basic Message Logging, page 5-115

Logging Locations and Severity Levels

Error messages can be logged to a variety of locations, as shown in Table 5 -1.
You can log messages based on the severity level of the messages, as shown in Table 5 -2.
Table5-1 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
Table5-2 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.