SNMP Traps

Information About Configuring SNMP Traps

Simple Network Management Protocol (SNMP) Traps are alert messages sent from a remote SNMP-enabled device such as the controller, to an SNMP manager. Traps are unreliable because the receiver does not send acknowledgments when the device receives traps. Hence, the sender cannot determine if the traps were received.

In order to configure the controller to send SNMP notifications, you must enter at least one snmp-server host command. If you do not enter an snmp-server host command, no notifications are sent.

In order to enable multiple hosts, you must specify separate snmp-server host command for each host. You can specify multiple notification types in the command for each host. When multiple snmp-server host commands are given for the same host and notification of either trap or inform, each command overwrites the previous command. Only the last snmp-server host command is taken into account. For example, if you enter an snmp-server host inform command for a host and then enter another snmp-server host inform command for the same host, the second command replaces the first.

Specify the snmp-server enable traps wireless <TrapName> command in order to specify which SNMP notifications are sent globally. In order for a host to receive wireless notifications, at least one snmp-server enable traps wireless <TrapName> command and the snmp-server host command for that host must be enabled. However, some notification types cannot be controlled with the snmp-server enable command. And some notification types are enabled by default . For example, few AP related traps crash, register, and noradiocards are enabled by default.

Configuring SNMP Traps (GUI)

Procedure

Step 1

Choose Administration > Management > SNMP.

The SNMP page is displayed. By default, the SNMP mode is disabled. To enable or disable SMNP, click the SNMP Mode toggle button.

Step 2

Choose the Wireless Traps tab.

By default, all SNMP wireless traps are disabled except the Access Point trap. To enable all the wireless traps, click Enable All.

Step 3

Select the wireless SNMP trap that you wish to enable. Click the Select All check box to enable all the trapflags present in the trap. For example, to enable all the trapflags in the Mesh trap section, check the Select All check box present at the right-hand corner of the section. Uncheck the Select All check box to remove selection.

Note

 
In the Access Point trap, Crash, No Radio Cards, and Register trapflags are enabled by default. Select Broken Antenna trapflag to detect broken antenna. Select AP Stats trapflag to enable a trap for AP statistics.

Step 4

Click Apply.

Enabling Access Points Traps (CLI)

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

snmp-server enable traps wireless AP

Example:

Device# snmp-server enable traps wireless AP

Enables wireless SNMP traps for access points.

Step 3

trapflags ap{ authorization | broken-antenna | crash | interfaceup | ipaddrfallback | mfp | mode | noradiocards | register}

Example:

Device# trapflags ap authorization

Enables or disables sending AP related trapflags. The crash, noradiocards, and register trapflags are enabled by default.

Enabling Wireless Client Traps (CLI)

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

snmp-server enable traps wireless bsnMobileStation

Example:

Device# snmp-server enable traps wireless bsnMobileStation

Enables wireless client traps.

Step 3

trapflags client dot11 { assocfail | associate | authenticate | authfail | deauthenticate | disassociate }

Example:

Device# trapflags client dot11 assocfail

Enables or disables dot11 related trapflags for clients.

Step 4

trapflags client excluded

Example:

Device# trapflags client excluded

Enables the excluded trapflags for clients.

Enabling Mesh Traps (CLI)

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

snmp-server enable traps wireless MESH

Example:

Device# snmp-server enable traps wireless MESH

Enables wireless mesh traps.

Step 3

trapflags mesh { abate-snr | authentication-failure | child-moved | excessive-children | excessive-hopcount | onset-snr | parent-change }

Example:

Device# trapflags mesh abate-snr

Enables or disables mesh trapflags.

Enabling RF Traps (CLI)

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

snmp-server enable traps wireless bsnAutoRF

Example:

Device# snmp-server enable traps wireless bsnAutoRF

Enables wireless RF related traps.

Step 3

trapflags rrm-params{ channels | tx-power}

Example:

Device# trapflags rrm-params channels

Enables or disables sending RRM parameter update related traps.

Step 4

trapflags rrm-profile{ coverage | interference | load | noise}

Example:

Device# trapflags rrm-profile coverage

Enables or disables RRM profile related traps.

Enabling Rogue, Mobility, RRM, and General Traps (CLI)

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

snmp-server enable traps wireless rogue

Example:

Device# snmp-server enable traps wireless rogue

Enables traps for wireless rogue.

Step 3

trapflags rogue-ap

Example:

Device# trapflags rogue-ap

Enables rogue AP detection trapflag.

Step 4

trapflags rogue-client

Example:

Device# trapflags rogue-client

Enables rogue client detection trapflag.

Step 5

snmp-server enable traps wireless wireless_mobility

Example:

Device# snmp-server enable traps wireless wireless_mobility

Enables traps for wireless mobility.

Step 6

trapflags anchor

Example:

Device# trapflags anchor

Enables anchor trapflags.

Step 7

snmp-server enable traps wireless RRM

Example:

Device# snmp-server enable traps wireless RRM

Enables traps for wireless RRM.

Step 8

trapflags rrm-params group

Example:

Device# trapflags rrm-params group

Enables or disables the RRM parameter related traps, when the RF manager group changes.

Step 9

snmp-server enable traps wireless bsnGeneral

Example:

Device# snmp-server enable traps wireless bsnGeneral

Enables general controller traps.

Verifying SNMP Wireless Traps

To verify the various SNMP traps enabled, use the following command: 
Device# show run | sec trapflag 
trapflags ap crash
trapflags ap noradiocards
trapflags ap register
trapflags rogue-client