Cisco Systems 3750 System Message Overview

2-1

Catalyst 3750, 3560, 3550, 2975, 2970, and 2960 Switch System Message Guide

OL-8551-04

System Message Overview

This guide describes the Catalyst 3750, 3560, 3550, 2975, 2 970, and 2960-specific system messages.

During operation, the system software sends these messages to the console ( and, optionally, to a logging

server on another system). Not all system messages indicate problems with your system. Some messages

are purely informational, whereas others can help diagno se problems with communications lines,

internal hardware, or the system software. This guide also includes error messages that appear when the

system fails.

For information about system messages that are not Catalyst 3750, 3560, 3550, 2975, 2970, or 2960

platform-specific, see the Cisco IOS Software System Messages for Cisco IOS Release 12.2S.

This chapter contains these sections:

• How to Read System Messages, page 2-1

• Error Message Traceback Reports, page 2-7

System log messages can contain up to 80 characters a nd a percent sign (%), which follows the optional

sequence number or time stamp information, if configured. Messag es are displayed in this format:

seq no:timestamp: %facility-severity-MNEMONIC:description (hostname-n) (only Catalyst 3750 and

2975 switches)

seq no:timestamp: %facility-severity-MNEMONIC:description (switches other than Catalyst 3750 and

2975 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 outp ut from system messages and redirect the output to the

logging process on the stack master.

Each system message begins with a percent s ign (%) and is structured as follows:

%FACILITY-SEVERITY-MNEMONIC: Message-text

• FACILITY is a code consisting of 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.

Table 2-1 lists Catalyst 3750, 3560, 3550, 2975, 2970, and 2960-specific facility codes. These

messages are described in Chapter 3, “Message and Recovery Procedures,” in alphabetical order by

facility code, with the most severe (lowest number) errors described first.