Catalyst 3750 Metro Switch System Message Guide, 12.1(14)AX
System Message Overview
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System Message Overview

Table Of Contents

System Message Overview

How to Read System Messages

Error Message Traceback Reports

Output Interpreter

Bug Toolkit

Contacting TAC

System Message Overview

This guide describes the Catalyst Metro-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 diagnose problems with communications lines, internal hardware, or the system software. This guide also includes error messages that appear when the system fails.

Note For information about system messages that are not Catalyst platform-specific, refer to the Cisco IOS Software System Messages for Cisco IOS Release 12.1.

This chapter contains these sections:

How to Read System Messages

Error Message Traceback Reports

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 are displayed in this format:

By default, a switch sends the output from system messages to a logging process. Each system message begins with a percent sign (%) and is structured as follows:


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 1 lists Catalyst specific facility codes. These messages are described in "Message and Recovery Procedures," in alphabetical order by facility code with the most severe (lowest number) errors described first.

Table 1 Facility Codes 

Facility Code


ACL manager

"ACLMGR Messages" section


Cluster Membership Protocol

"CMP Messages" section


8021.Q Messages

"DOT1Q Tunneling Message" section


8021.X tunneling

"DOT1X Messages" section


Dynamic Trunking Protocol

"DTP Messages" section



"EC Messages" section


Ethernet Controller

"ETHCNTR Messages" section


Express Setup

"EXPRESS_SETUP Messages" section

GBIC (SFP) Security Messages

Small form-factor pluggable (SFP) module security

"GBIC (SFP) Security Messages" section



"HARDWARE Messages" section


Local forwarding manager

"HLFM Messages" section


Interface database manager process

"IDBMAN Messages" section


Low-level platform-specific

"PLATFORM Messages" section


Fallback bridging manager

"PLATFORM_FBM Messages" section


Policy-based routing

"PLATFORM_PBR Messages" section


Port manager

"PLATFORM_PM Messages" section


Switched Port Analyzer

"PLATFORM_SPAN Messages" section



"PLATFORM_VLAN Messages" section


Port manager

"PM Messages" section


Port security

"PORT SECURITY Messages" section


QoS manager

"QOSMGR Messages" section


Switched Port Analyzer (SPAN)

"SPAN Messages" section


Spanning tree

"SPANTREE Messages" section


Spanning-tree fast convergence

"SPANTREE_FAST Messages" section


Spanning-tree VLAN switch

"SPANTREE_VLAN_SWITCH Messages" section


Supervisor ASIC

"SUPERVISOR Messages" section


Supervisor queue

"SUPQ Messages" section


VLAN manager

"SW_VLAN Messages" section


Ternary content addressable memory manager

"TCAMMGR Messages" section


UniDirectional Link Detection (UDLD)

"UDLD Messages" section


Uplink fast packet transmission

"UFAST_MCAST_SW Messages" section


VLAN Query Protocol (VQP) client

"VQPCLIENT Messages" section

SEVERITY is a single-digit code from 0 to 7 that reflects the severity of the condition. The lower the number, the more serious the situation. Table 2 lists the message severity levels.

Table 2 Message Severity Levels 

Severity Level

0 - emergency

System is unusable.

1 - alert

Immediate action required.

2 - critical

Critical condition.

3 - error

Error condition.

4 - warning

Warning condition.

5 - notification

Normal but significant condition.

6 - informational

Informational message only.

7 - debugging

Message that appears during debugging only.

MNEMONIC is a code that uniquely identifies the message.

Message-text is a text string describing the condition. This portion of the message sometimes contains detailed information about the event, including terminal port numbers, network addresses, or addresses that correspond to locations in the system memory address space. Because the information in these variable fields changes from message to message, it is represented here by short strings enclosed in square brackets ([ ]). A decimal number, for example, is represented as [dec]. Table 3 lists the variable fields in messages.

Table 3 Representation of Variable Fields in Messages 

Type of Information


Decimal integer


Single character


Character string


Ethernet address (for example, 0000.FEED.00C0)


Hexadecimal integer


Internet address

Error Message Traceback Reports

Some messages describe internal errors and contain traceback information. This information is very important and should be included when you report a problem to your technical support representative.

This message example includes traceback information:

-Process= "Exec", level= 0, pid= 17
-Traceback= 1A82 1AB4 6378 A072 1054 1860 

Some system messages ask you to copy the error messages and take further action. These online tools also provide more information about system error messages.

Output Interpreter

The Output Interpreter provides additional information and suggested fixes based on the output of many CLI commands, such as the show tech-support privileged EXEC command. You can access the Output Interpreter at this URL:

Bug Toolkit

The Bug Toolkit provides information on open and closed caveats, and you can search for all known bugs in a specific Cisco IOS Release. You can access the Bug Toolkit at this URL:

Contacting TAC

If you cannot determine the nature of the error, see the "Obtaining Technical Assistance" section on page vii for further information.