CHAPTER 1
Configuring System Log Messages
The Junos OS generates system log messages (also called syslog messages) to record
events that occur on the routing platform, including the following:
•
Routine operations, such as creation of an OSPF protocol adjacency or a user login
into the configuration database
•
Failure and error conditions, such as failure to access a configuration file or unexpected
closure of a connection to a peer process
•
Emergency or critical conditions, such as routing platform power-down due to excessive
temperature
Each system log message identifies the Junos OS process that generated the message
and briefly describes the operation or error that occurred. This reference provides more
detailed information about each system log message and, when applicable, describes
possible causes of the message and action you can take to correct error conditions.
NOTE: The configuration hierarchy in this chapter applies to Junos OS processes and
libraries, not to the services on a PIC such as the Adaptive Services PIC. For information
about configuring system logging for PIC services, see the Junos Services Interfaces
Configuration Guide.
For information about interpreting messages generated by services on a PIC, see
“Interpreting Messages Generated in Standard Format by Services on a PIC” on page 41.
This chapter discusses the following topics:
•
System Logging Configuration Statements on page 4
•
Minimum and Default System Logging Configuration on page 4
•
Configuring System Logging for a Single-Chassis System on page 7
•
Configuring System Logging for a Routing Matrix on page 26
•
Displaying and Interpreting System Log Messages on page 35
•
Getting Help About System Log Messages on page 46
3Copyright © 2010, Juniper Networks, Inc.
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