ZyXEL Communications ONU-2024 Series, User Manual

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ONU User’s Guide
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H A P T E R
2 9
Syslog
29.1 Overview
The syslog protocol allows devices to send event notification messages across an IP network
to syslog servers that collect the event messages. A syslog-enabled device can generate a
syslog message and send it to a syslog server.
Syslog is defined in RFC 3164. The RFC defines the packet format, content and system log
related information of syslog messages. Each syslog message has a facility and severity level.
The syslog facility identifies a file in the syslog server. Refer to the documentation of your
syslog program for details. The following table describes the syslog severity levels.
29.1.1 What You Can Do in the Syslog Screens
• The Syslog Setup screen lets you configure the ONU to send logs to an external syslog
server ( Section 29.2 on page 220 ).
• The Syslog Server Setup screen lets you configure a list of external syslog servers
( Section 29.3 on page 221 ).
Table 87 Syslog Severity Levels
CODE SEVERITY
0 Emergency: The system is unusable.
1 Alert: Action must be taken immediately.
2 Critical: The system condition is critical.
3 Error: There is an error condition on the system.
4 Warning: There is a warning condition on the system.
5 Notice: There is a normal but significant condition on the system.
6 Informational: The syslog contains an informational message.
7 Debug: The message is intended for debug-level purposes.