This document describes system messages for Cisco software releases. During operation, the system software sends these messages to the console (and, optionally, to a logging server on another system) during operation. Not all system messages indicate problems with your system. Some are purely informational, and others may help diagnose problems with communications lines, internal hardware, or the system software.
Error Messages Decoder
The Cisco Technical Assistance Center (TAC) has made available to all registered users an online tool, the Cisco Error Message Decoder, for researching and resolving messages: The Cisco Error Messages Decoder. All you have to do is copy an error message or command output from your screen and paste it into the appropriate text fields of the tool. Within moments, the tool responds with an interpretation of your text. The Cisco Error Message Decoder makes it easy for you to distinguish between messages that are purely informational and those that alert you to potential problems. This tool provides you with an explanation of the error message, a recommended action, and links to suggested online Cisco technical support resources. For help researching and resolving your Cisco messages, try the new Cisco Error Message Decoder tool at http://www.cisco.com/cgi-bin/Support/Errordecoder/index.cgi
How to Read System Messages
System messages begin with a percent sign (%) and are structured as follows.
The text in bold are required elements of the System Message, the text in italics are optional elements of the System Message.
is a code consisting of two or more uppercase letters that indicate the facility to which the message refers. A facility can be a hardware device, a protocol, or a module of the system software.
SUBFACILITY is used only for Cisco Catalyst 6000 series switches that are operating in a distributed system. The subfacility can consist of one code, or two codes that are divided by a hyphen, and describes the part of the distributed system from where the message is coming. For example, the
system message is the
message coming from the switch processor (SP) that is in redundant or standby (STDBY) mode.
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 1 lists the severity levels.
is a code that uniquely identifies the system message.
is a text string that describes 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
Table 2 lists the representations of variable fields and the type of information in them.
The following is a sample system message:
%LINK-2-BADVCALL: Interface [chars], undefined entry point
Some messages also indicate the card and slot that are reporting the error. These messages begin with a percent sign (%) and are structured as follows:
is a code that describes the type of card reporting the error. Possible card types are: CIP, CIP2, ECPA, ECPA4, FEIP, PCPA, and VIP.
is a mnemonic that indicates that this is a message. It is always shown as
indicates the slot number of the card that is reporting the error. It is shown as
followed by a number (for example,
Table 1 System Message Severity Levels
0 – emergency
1 – alert
Immediate action needed
2 – critical
3 – error
4 – warning
5 – notification
Normal but significant condition
6 – informational
Informational message only
7 – debugging
Appears during debugging only
System message severity levels correspond to the keywords assigned by the
global configuration commands that define where and at what level these messages appear. In general, the default is to log messages from level 0 (emergencies) to level 7 (debugging). However, the default level varies by platform. For more information, see the system configuration chapter and descriptions of the
commands in the appropriate Cisco IOS configuration guide and command reference publications.
Table 2 Representation of Variable Fields in Messages
Type of Information
AppleTalk network, either 600 or 600-601
Ethernet address (for example, 0000.FEED.00C0)
Internet address (for example, 10.0.2.16)
IP version 6 (IPv6) address
Address or node name
Terminal line number in octal (or in decimal if the decimal-TTY service is enabled)
VINES name; or number (hex or decimal)
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.
The following sample message includes traceback information:
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.