IP Application Services

Document ID: 15455

Contents

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
How Do I Find Out What Traps Are Enabled on My Switch?
How Do I Configure the SNMP Trap Receiver on the Switch?
How Do I Enable Traps on the Switch, and What Does Each Trap Mean?
How Do I Enable Traps on Individual Ports, Such as linkUp/linkDown?
What Other Traps Can the Catalyst Switch Send?
Verify
Troubleshoot
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Related Information

Introduction

This document describes the traps that the Catalyst OS (CatOS) supports and how to configure them on the switch.

Trap operations allow Simple Network Management Protocol (SNMP) agents to send asynchronous notifications of the occurrence of an event. Traps are sent on a best-effort basis and without any method to verify their receipt.

Prerequisites

Requirements

Before you attempt this configuration, ensure that:

• You have properly configured the SNMP community strings on the switch

Note: Refer to How to Configure SNMP Community Strings for more information.

Components Used

The information in this document is based on these software and hardware versions:

• Catalyst 4500/4000, 5500/5000, and 6500/6000 series switches

• CatOS version 7.3

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

For more information on document conventions, refer to Cisco Technical Tips Conventions.

How Do I Find Out What Traps Are Enabled on My Switch?

Issue the show snmp command in the enable mode. Here is a sample output:

6509 (enable) show snmp 

RMON:                       Enabled 
Extended RMON Netflow Enabled : None. 
Traps Enabled: 
Port,Module,Chassis,Bridge,Repeater,Vtp,Auth,ippermit,Vmps,config,entity,stpx,syslog
Port Traps Enabled: 2/1-2,3/1-48,4/1-8 

Community-Access     Community-String 
.... 
.... 

!--- Output suppressed.

How Do I Configure the SNMP Trap Receiver on the Switch?

Issue the command set snmp trap host string .

Note: The command syntax includes:

• host —IP address or IP alias of the system to receive SNMP traps.

• string —Community string to use in order to send authentication traps.

Here is an example:

6509 (enable) set snmp trap 1.1.1.1 public
SNMP trap receiver added.

Issue the show snmp command in order to verify the addition of this set snmp trap statement. Here is a sample output:

6509 (enable)  show snmp
6509 (enable)  show snmp 
RMON:                       Enabled 
Extended RMON Netflow Enabled : None. 

!--- Output suppressed.
 
.... 
.... 

!--- Output suppressed.
 
Trap-Rec-Address  Trap-Rec-Community
---------------       ----------------- 
1.1.1.1               public

How Do I Enable Traps on the Switch, and What Does Each Trap Mean?

Issue the set snmp trap command to enable or disable the different SNMP traps on the system. The command also adds an entry into the SNMP authentication trap receiver table.

Syntax

set snmp trap {enable | disable} [all | auth | bridge | chassis | config | entity | entityfru | envfan | envpower | envshutdown | ippermit | module | repeater | stpx | syslog | system | vmps | vtp]

Note: This command should be on one line.

Syntax Description

authenticationFailure 
(.1.3.6.1.2.1.11.0.4)

newRoot (.1.3.6.1.2.1.17.0.1)
topologyChange (.1.3.6.1.2.1.17.0.2)

chassisAlarmOn (.1.3.6.1.4.1.9.5.0.5)
chassisAlarmOff (.1.3.6.1.4.1.9.5.0.6)

sysConfigChangeTrap 
(.1.3.6.1.4.1.9.5.0.9)

entConfigChange 
(.1.3.6.1.2.1.47.2.0.1)

cefcModuleStatusChange 
(.1.3.6.1.4.1.9.9.117.2.0.1) 
cefcPowerStatusChange 
(.1.3.6.1.4.1.9.9.117.2.0.2) 
cefcFRUInserted 
(.1.3.6.1.4.1.9.9.117.2.0.3) 
cefcFRURemoved 
(.1.3.6.1.4.1.9.9.117.2.0.4)

ciscoEnvMonFanNotification 
(.1.3.6.1.4.1.9.9.13.3.0.4)

ciscoEnvMonRedundantSupplyNotification 
(.1.3.6.1.4.1.9.9.13.3.0.5)

ciscoEnvMonShutdownNotification 
(.1.3.6.1.4.1.9.9.13.3.0.1)

ciscoEnvMonTemperatureNotification 
(.1.3.6.1.4.1.9.9.13.3.0.3)

ipPermitDeniedTrap 
(.1.3.6.1.4.1.9.5.0.7)

cmnMacChangedNotification 
(.1.3.6.1.4.1.9.9.215.2.0.1)

moduleUp (.1.3.6.1.4.1.9.5.0.3)
moduleDown (.1.3.6.1.4.1.9.5.0.4)

rptrHealth (.1.3.6.1.2.1.22.0.1)
rptrGroupChange (.1.3.6.1.2.1.22.0.2) 
rptrResetEvent (.1.3.6.1.2.1.22.0.3)

stpxInconsistencyUpdate 
(.1.3.6.1.4.1.9.9.82.2.0.1) 
stpxLoopInconsistencyUpdate 
(.1.3.6.1.4.1.9.9.82.2.0.3) 
stpxRootInconsistencyUpdate 
(.1.3.6.1.4.1.9.9.82.2.0.2)

clogMessageGenerated 
(.1.3.6.1.4.1.9.9.41.2.0.1)

ciscoSystemClockChanged 
(1.3.6.1.4.1.9.9.131.2.0.1)

vmVmpsChange 
(.1.3.6.1.4.1.9.9.68.2.0.1)

vtpConfigDigestError 
(.1.3.6.1.4.1.9.9.46.2.0.2) 
vtpConfigRevNumberError 
(.1.3.6.1.4.1.9.9.46.2.0.1) 
vlanTrunkPortDynamicStatusChange 
(.1.3.6.1.4.1.9.9.46.2.0.7) 
vtpVersionOneDeviceDetected 
(.1.3.6.1.4.1.9.9.46.2.0.6)

¹ FRU = field-replaceable unit

² STPX = Spanning Tree Protocol Extensions

³ VTP = VLAN Trunk Protocol

How Do I Enable Traps on Individual Ports, Such as linkUp/linkDown?

Issue the set port trap command to enable or disable the operation of the standard SNMP link trap for a port or range of ports. By default, all port traps are disabled.

Note: The Network Analysis Module (NAM) does not support this command.

Syntax

set port trap mod/port {enable | disable}

Syntax Description

• mod/port —Number of the module and the port on the module.

• enable—Keyword to activate the SNMP link trap.

• disable—Keyword to deactivate the SNMP link trap.

If you enable the traps, the corresponding traps that generate are linkUp (.1.3.6.1.2.1.11.0.3) and linkDown (.1.3.6.1.2.1.11.0.2). These traps are from the IF-MIB.

Example

This example shows how to enable the SNMP link trap for module 1, port 2:

Console> (enable) set port trap 1/2 enable
Port 1/2 up/down trap enabled.
Console> (enable)

What Other Traps Can the Catalyst Switch Send?

See this table:

ciscoFlashCopyCompletionTrap

ciscoFlashDeviceChangeTrap

ciscoFlashMiscOpCompletionTrap

coldStart

warmStart

tokenRingSoftErrExceededTrap

lerAlarmOn

lerAlarmOff

entSensorThresholdNotification

fallingAlarm

risingAlarm

Verify

There is currently no verification procedure available for this configuration.

Troubleshoot

There is currently no specific troubleshooting information available for this configuration.

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Related Information

• Cisco Products & Services - Switches
• Cisco IOS SNMP Traps Supported and How to Configure Them
• IP Application Services Configuration Examples and TechNotes
• Network Management Software Downloads - MIBs ( registered customers only)
• LAN Switching Support Page
• Technical Support & Documentation - Cisco Systems