Cisco Log Severity Levels
Cisco router log messages fall into one of eight levels as shown in the figure.
Cisco Log Severity Levels
|
Level |
Name |
Description |
|
0 |
Emergencies |
Router unusable |
|
1 |
Alerts |
Immediate action required |
|
2 |
Critical |
Condition critical |
|
3 |
Errors |
Error condition |
|
4 |
Warnings |
Warning condition |
|
5 |
Notifications |
Normal but important event |
|
6 |
Informational |
Informational message |
|
7 |
Debugging |
Debug message |
The lower the level number, the higher the severity level, as shown in the table.
Cisco Log Severity Levels
|
Syslog Level |
Definition |
Example |
|
0 LOG_EMERG |
A panic condition normally broadcasted to all users |
Cisco IOS software could not load |
|
1 LOG_ALERT |
A condition that should be corrected immediately, such as a corrupted system database |
Temperature too high |
|
2 LOG_CRIT |
Critical conditions, for example, hard device errors |
Unable to allocate memory |
|
3 LOG_ERR |
Errors |
Invalid memory size |
|
4 LOG_WARNING |
Warning messages |
Crypto operation failed |
|
5 LOG_NOTICE |
Conditions that are not error conditions, but should possibly be handled specially |
Interface changed state, up or down |
|
6 LOG_INFO |
Informational messages |
Packet denied by ACL |
|
7 LOG_DEBUG |
Messages that contain information normally of use only when debugging a program |
Packet type invalid |
Note When entering logging levels in commands in Cisco IOS software Release 11.3 and earlier, you must specify the level name. Cisco IOS software Release 12.0 and later support using the level number or the level name, or both the number and the name.
5-174 Implementing Secure Converged Wide Area Networks (ISCW) v1.0 © 2006 Cisco Systems, Inc.
Continue reading here: Configuring Syslog Logging
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