Getting Powersupply alerts for Cisco Wireless Device(s) that do not have a PowerSupply
Article ID: 331626
Updated On: 03-11-2025
Products
Issue/Introduction
Smarts generates Power Supply Alert for a Cisco 6509 Wireless device, however, that device does not have a power supply.
Environment
Smarts 10.x / 2.X
Cause
For better Monitoring & Reporting of network device's availability and performance, Broadcom puts supported products through a certification process where our Certification team qualifies devices that will be discovered and monitored by Smarts.
As such, Cisco 6509 Wireless Controller is officially certified and the following certificate is used:
# Cisco 6509 WISM Controller
.1.3.6.1.4.1.14179.1.1.4.4 {
TYPE = WirelessController
VENDOR = Cisco
MODEL = Cisco-WISM-Controller
CERTIFICATION = CERTIFIED
CONT = Cisco-Entity-Switch
WIFI = Cisco-Wireless
VLAN = Dot1q
NEIGHBOR = Cisco-Cdp
HEALTH = Cisco-WLAN-4402
INSTRUMENTATION:
Environment = CiscoWLAN4402
CPU/Memory = CiscoWLAN4402
Interface-Fault = MIB2
Interface-Performance = MIB2
Port-Fault = MIB2
Port-Performance = MIB2
Port-Ethernet-Performance = dot3_Ethernet
WirelessAccessPoint-Fault = Cisco_AireSpace_Wireless_MIB
WirelessClient-Fault = Cisco_Lwapp
WirelessController-Performance = Cisco_Airespace_Switching
AuthenticationServer-Fault = Cisco_Airespace_Wireless_MIB
}
NOTE: HEALTH parameter is referring to Smarts driver that is responsible for devices environment and performance information. It is also important to know not all devices
use the same driver.
This device is using CiscoWLAN4402 drivers and the breakdown of that driver is as follows:
GA_Driver::Performance-Cisco-WLAN-4402-Driver {
ReadsRulesFrom = GA_RuleSet::Performance-Cisco-WLAN-4402-RS {
fileName = "discovery/ic-cisco-wlan-4402-health.asl"
}
ReadsInputFrom = SNMP_WalkFE::Performance-Cisco-WLAN-4402-FE {
rootOIDs = {
# agentCurrentCPUUtilization
{10, ".1.3.6.1.4.1.14179.1.1.5.1"},
# agentTotalMemory
{20, ".1.3.6.1.4.1.14179.1.1.5.2"},
# bsnSensorTemperature
{30, ".1.3.6.1.4.1.14179.2.3.1.13"},
# agentSwitchInfoPowerSupply1Present
{40, ".1.3.6.1.4.1.14179.1.1.3.2"},
# agentSwitchInfoPowerSupply2Present
{50, ".1.3.6.1.4.1.14179.1.1.3.4"}
}
}
waitForCompletion = TRUE
NOTE: A device may contain different component (e.g. memory/power supply/cpu) and different component may have different Object ID that is used to collect availability
and performance report and generate alerts based on threshold settings. In this case, OID .1.3.6.1.4.1.14179.1.1.3.2 is used for this device's power supply:
And Smarts polls:
# agentSwitchInfoPowerSupply1Present
{40, ".1.3.6.1.4.1.14179.1.1.3.2"},
NOTE: A WALK of a device is the act of probing a device by asking the device agent for every value it can supply you. Given this output you can then know exactly what is being reported where and where and how you want to tackle it in the code
A search of the WALKs for the power supply OID will show:
Device.walk (1 hit)
Line 4928: .1.3.6.1.4.1.14179.1.1.3.2.0|1|
Device.mimic (1 hit)
Line 6415: .1.3.6.1.4.1.14179.1.1.3.2.0: 1
Device.snap (1 hit)
Line 6397: .1.3.6.1.4.1.14179.1.1.3.2.0 INTEGER-32 1
Reviewing the results, we see that OID ".1.3.6.1.4.1.14179.1.1.3.2." has a value assigned to it and that value is "1". Cross-referencing the value with Cisco s SNMP Object Navigator we see the following:
| Specific Object Information |
| Object | agentSwitchInfoPowerSupply1Present |
| OID | 1.3.6.1.4.1.14179.1.1.3.2 |
| Type | INTEGER |
| Permission | read-only |
| Status | current |
| Values | 0 : false 1 : true |
| MIB | AIRESPACE-SWITCHING-MIB ; - View Supporting Images |
| Description | "This is to indicate if the switch has Power Supply 1 present on it. This is applicable to the 4200 series and will always return true for the earlier device versions." |
As indicated by Cisco, Value of 1 = TRUE which means Power Supply is present for that device, but that device does not have a Power Supply
Resolution
To reiterate, a search of the WALKs for the power supply OID will show:
Device.walk (1 hit)
Line 4928: .1.3.6.1.4.1.14179.1.1.3.2.0|1|
Device.mimic (1 hit)
Line 6415: .1.3.6.1.4.1.14179.1.1.3.2.0: 1
Device.snap (1 hit)
Line 6397: .1.3.6.1.4.1.14179.1.1.3.2.0 INTEGER-32 1
Reviewing the results, we see that OID ".1.3.6.1.4.1.14179.1.1.3.2." has a value assigned to it and that value is "1". We can see:
| Specific Object Information |
|
As indicated by Cisco, Value of 1 = TRUE which means Power Supply is present for that device, but that device does not have a Power Supply.
This may be an issue with the SNMP agent, we recommend to verify that device's SNMP agent is functioning as it should. You may need to contact the SNMP Agent provider.
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