CHAPTER
1-1
Catalyst 3750-X, 3750-E, 3560-X, and 3560-E Switch System Message Guide
OL-9772-05
1
System Message Overview
This guide describes the Catalyst 3750-X, 3750-E, 3560-X, or 3560-E-specific system messages. The
system software sends these messages to the console (and, optionally, to a logging server on another
system). Not all system messages mean problems with your system. Some messages are informational,
and others can help diagnose problems with communications lines, internal hardware, or the system
software.
Note For information about system messages that are not Catalyst 3750-X, 3750-E, 3560-X, or 3560-E
platform-specific, see the Cisco IOS Software System Messages for Cisco IOS Release 12.2S.
• How to Read System Messages, page 1-1
• Error Message Traceback Reports, page 1-7
How to Read System Messages
System log messages can contain up to 80 characters and a percent sign (%), which follows the optional
sequence number or time-stamp information, if configured. Messages appear in this format:
seq no:timestamp: %facility-severity-MNEMONIC:description (hostname-n) (Catalyst 3750-X or
3750-E switches)
seq no:timestamp: %facility-severity-MNEMONIC:description (Catalyst 3560-X or 3560-E switches)
By default, a switch sends the output from system messages to a logging process. In a switch stack, stack
members append their hostnames to the output from system messages and redirect the output to the
logging process on the stack master.
Each system message begins with a percent sign (%) and is structured as follows:
%FACILITY-SEVERITY-MNEMONIC: Message-text
• FACILITY is two or more uppercase letters that show the facility to which the message refers. A
facility can be a hardware device, a protocol, or a module of the system software.
These messages are described in Chapter 2, “Message and Recovery Procedures,” in alphabetical
order by facility code, with the most severe (lowest number) errors described first.
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