Smarts IP/Smarts SAM: Cisco Wireless Service Module (WiSM) is generating false "PowerSupply_Fault_CiscoWLANxxx_2", power supply "state not normal" events

Products

• VMware Smart Assurance

Issue/Introduction

Symptoms:


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_CiscoWLANxxx_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.