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Table Of Contents
How to Read System Error Messages
Error Message Traceback Reports
Error Message and Recovery Procedures
System Error Messages
This chapter describes the IOS system error messages for the Catalyst 2950 switches. The system software sends these error messages to the console (and, optionally, to a logging server on another system) during operation. Not all system error messages indicate problems with your system. Some messages are purely informational, while others might help diagnose problems with communications lines, internal hardware, or the system software.
This chapter contains the following sections:
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How to Read System Error Messages
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How to Read System Error Messages
System error messages begin with a percent sign (%) and are structured as follows:
%FACILITY-SUBFACILITY-SEVERITY-MNEMONIC: Message-text
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Table A-1 Facility Codes
CMP
Cluster Membership Protocol
ENVIRONMENT
Environment
LINK
Link
PORT SECURITY
Port Security
RTD
Runtime Diagnostic
STORM CONTROL
Storm Control
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The following is a sample system error message:
%LINK-2-BADVCALL: Interface [chars], undefined entry point
Some error messages also indicate the card and slot reporting the error. These error messages begin with a percent sign (%) and are structured as follows:
%CARD-SEVERITY-MSG:SLOT %FACILITY-SEVERITY-MNEMONIC: Message-text
CARD is a code that describes the type of card reporting the error.
MSG is a mnemonic that indicates this is a message. It is always shown as MSG.
SLOT indicates the slot number of the card reporting the error. It is shown as SLOT followed by a number. (For example, SLOT5.)
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.
The following sample message includes traceback information:
-Process= "Exec", level= 0, pid= 17
-Traceback= 1A82 1AB4 6378 A072 1054 1860
Error Message and Recovery Procedures
This section lists the switch system messages by facility. Within each facility, the messages are listed by severity levels 0 to 7: 0 is the highest severity level, and 7 is the lowest severity level. Each message is followed by an explanation and a recommended action.
CMP Messages
This section contains the Cluster Membership Protocol (CMP) error messages.
CMP-5-ADD: The Device is added to the cluster (Cluster Name:[chars], CMDR IP Address [inet])Explanation The message indicates the device is added to the cluster: [chars] is the cluster name, and [inet] is the internet address of the command switch.
Action No action is required.
CMP-5-MEMBER_CONFIG_UPDATE: Received member configuration from member [dec]Explanation This message indicates that the command switch received a member configuration: [dec] is the member number.
Action No action is required.
CMP-5-REMOVE The Device is removed from the cluster (Cluster Name:[chars])Explanation The message indicates the device is removed from the cluster: [chars] is the cluster name.
Action No action is required.
Environment Messages
This section contains the Environment error messages.
ENVIRONMENT-2-FAN_FAULTExplanation This message indicates that an internal fan fault is detected.
Action Either check the switch itself or use the show env command to determine if a fan on the switch has failed. The Catalyst 2950 switch can operate normally with one failed fan. Replace the switch at your convenience.
ENVIRONMENT-2-OVER_TEMPExplanation This message indicates that an overtemperature condition is detected.
Action Use the show env command to check if an overtemperature condition exists. If it does:
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Link Messages
This section contains the Link error message.
LINK-4-ERROR [chars] is experiencing errors.Explanation This messages indicates that excessive errors have occurred on this interface: [char] is the interface.
Action Check for duplex mismatches between both ends of the link.
Port Security Messages
This section contains the Port Security error message.
PORT_SECURITY-2-SECURITYREJECTExplanation This message indicates that a packet with an unexpected MAC source address is received on a secure port.
Action Remove the station with the unexpected MAC address from the secure port, or add the MAC address to the secure address table of the secure port.
RTD Messages
This section contains the Runtime Diagnostic (RTD) error messages.
RTD-1-ADDR_FLAP [chars] relearning [dec] addrs per minExplanation Normally, MAC addresses are learned once on a port. Occasionally, when a switched network reconfigures, due to either manual or STP reconfiguration, addresses learned on one port are relearned on a different port. However, if there is a port anywhere in the switched domain that is looped back to itself, addresses will jump back and forth between the real port and the port that is in the path to the looped back port. In this message, [chars] is the interface, and [dec] is the number of addresses being learnt.
Action Determine the real path (port) to the MAC address. Use debug ethernet-controller addr to see the alternate path-port on which the address is being learned. Go to the switch attached to that port. Note that show cdp neighbors is useful in determining the next switch. Repeat this procedure until the port is found that is receiving what it is transmitting, and remove that port from the network.
RTD-1-LINK_FLAP [chars] link down/up [dec] times per minExplanation This message indicates that an excessive number of link down-up events has been noticed on this interface: [chars] is the interface, and [dec] is the number of times the link goes up and down. This might be the result of reconfiguring the port, or it might indicate a faulty device at the other end of the connection.
Action If someone is reconfiguring the interface or device at the other side of the interface, ignore this message. However, if no one is manipulating the interface or device at the other end of the interface, it is likely that the Ethernet transceiver at one end of the link is faulty and should be replaced.
Storm Control Messages
This section contains the Storm Control error message.
STORM_CONTROL-2-SHUTDOWNExplanation This messages indicates that excessive traffic has been detected on a port that has been configured to be shut down if a storm event is detected.
Action Once the source of the packet storm has been fixed, re-enable the port by using port-configuration commands.