Syslog message format, Severity levels – Cisco ASA 5505 User Manual

Page 1745

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77-3

Cisco ASA 5500 Series Configuration Guide using the CLI

Chapter 77 Configuring Logging

Information About Logging

Syslog Message Format

Syslog messages begin with a percent sign (%) and are structured as follows:

%ASA

Level Message_number: Message_text

Field descriptions are as follows:

Severity Levels

Table 77-1

lists the syslog message severity levels. You can assign custom colors to each of the severity

levels to make it easier to distinguish them in the ASDM log viewers. To configure syslog message color
settings, either choose the Tools > Preferences > Syslog tab or, in the log viewer itself, click Color
Settings
on the toolbar.

Note

The ASA does not generate syslog messages with a severity level of zero (emergencies). This level is
provided in the logging command for compatibility with the UNIX syslog feature but is not used by the
ASA.

ASA

The syslog message facility code for messages that are generated by the ASA. This
value is always ASA.

Level

1 through 7. The level reflects the severity of the condition described by the syslog
message—the lower the number, the more severe the condition. See

Table 77-1

for

more information.

Message_number

A unique six-digit number that identifies the syslog message.

Message_text

A text string that describes the condition. This portion of the syslog message
sometimes includes IP addresses, port numbers, or usernames.

Table 77-1

Syslog Message Severity Levels

Level Number Severity Level

Description

0

emergencies

System is unusable.

1

alert

Immediate action is needed.

2

critical

Critical conditions.

3

error

Error conditions.

4

warning

Warning conditions.

5

notification

Normal but significant conditions.

6

informational

Informational messages only.

7

debugging

Debugging messages only.

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