WiSM is generating false "PowerSupply_Fault_CiscoWLAN###_2", power supply "state not normal" events
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WiSM is generating false "PowerSupply_Fault_CiscoWLAN###_2", power supply "state not normal" events

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Article ID: 332168

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Updated On:

Products

VMware Smart Assurance

Issue/Introduction

False Power supply event received in Smarts SAM

The following conditions, events or system behaviors may be observed with this issue:

  • Cisco Wireless controllers that are Wireless Service Modules (WiSM) are throwing "PowerSupply_Fault_CiscoWLAN###_2" State not normal alarms into Smarts SAM.
  • Cisco WiSM modules do not have a power supply.
  • Power supplies on the chassis are found to be functioning without issues.

Environment

VMware Smart Assurance - SMARTS

Cause

This is an issue with the Cisco MIB for the WiSM. Smarts uses the following OIDs for Power Supply:

  • agentSwitchInfoPowerSupply1Present 1.3.6.1.4.1.14179.1.1.3.2
  • agentSwitchInfoPowerSupply1Operational 1.3.6.1.4.1.14179.1.1.3.3
  • agentSwitchInfoPowerSupply2Present 1.3.6.1.4.1.14179.1.1.3.4
  • agentSwitchInfoPowerSupply2Operational 1.3.6.1.4.1.14179.1.1.3.5
For the Cisco WiSM, Smarts is using agentSwitchInfoPowerSupply2Operational = "1.3.6.1.4.1.14179.1.1.3.5" for Status, and it is returning 0 (not operational).  Meanwhile, Smarts is using agentSwitchInfoPowerSupply2Present 1.3.6.1.4.1.14179.1.1.3.4, and it is returning 1 for this device, so a PowerSupply object is created. However, WISM modules do not have a power supply.

Resolution

Contact the SNMP agent vendor (Cisco) regarding correcting the WiSM MIB representation.