JUNIPER-POWER-SUPPLY-UNIT-MIB

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Organization: Juniper Networks, Inc.

Last Updated: 2010-10-27

Category: Domain: Power Management, Hardware and Environment, Vendor: Juniper

Description: Juniper Networks MIB for monitoring power supply unit (PSU) status, redundancy, and fault conditions on Juniper chassis.

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What Is JUNIPER-POWER-SUPPLY-UNIT-MIB?

JUNIPER-POWER-SUPPLY-UNIT-MIB is Juniper's MIB for monitoring power supply unit (PSU) status, redundancy, and fault conditions on Juniper chassis-based platforms. It exposes power capacity/consumption data (available, allocated, reserved, consumed power), redundancy configuration, and temperature readings for the power subsystem. This is explicitly a hardware health monitoring MIB—it tracks power-supply redundancy state, total versus consumed power (to catch over-subscription), and PSU inflow/outflow temperature (to catch overheating), all classic power/environmental hardware-health indicators, with a notifications object providing trap-based alerting on these conditions. It is a Juniper enterprise-specific MIB (jnx tree), typically used alongside the broader Juniper chassis/environment MIB for complete hardware-health monitoring. It is typically deployed on Juniper chassis-based routers/switches, including the ACX710, whose JUNIPER-POWER-SUPPLY-UNIT-MIB support exposes this power and redundancy data, in data centers or carrier environments where PSU redundancy and power budget must be tracked to avoid overload or single-PSU-failure risk.

IPNetwork Monitor allows you to monitor SNMP objects defined in JUNIPER-POWER-SUPPLY-UNIT-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Juniper Networks chassis-based routers/switches

Monitoring Examples

An admin would poll jnxPsuRedundancy and jnxPsuRedundantPowerAvailable to confirm the chassis still has a functioning redundant power supply, and compare jnxPsuChassisPowerConsumed against jnxPsuTotalPowerAvailable/jnxPsuChassisPowerAllocated to detect the chassis approaching its power budget as new line cards are added. jnxPsuTemperatureInflow and jnxPsuTemperatureOutflow (sampled via jnxPsuTemperatureInflowSamples) would be watched for a rising delta indicating a failing PSU fan or blocked airflow, with jnxPsuNotifications firing a trap if a PSU fault or redundancy loss occurs.

What Can Be Monitored

PSU redundancy status
total/available/consumed power
power allocation/reservation
PSU inflow/outflow temperature
PSU fault notifications

Imported Objects

From JUNIPER-MIB

jnxContentsContainerIndex	OBJECT-TYPE
jnxContentsL1Index	OBJECT-TYPE
jnxContentsL2Index	OBJECT-TYPE
jnxContentsL3Index	OBJECT-TYPE

From JUNIPER-SMI

jnxPsuMIBRoot

OBJECT-IDENTITY

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using jnxPsuAvailableDeviceCount OID:

Select a Juniper Networks chassis-based router/switch (power supply unit health) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type jnxPsuAvailableDeviceCount into the Find box to locate it in the OID tree, then select it and click OK. Gives the number of PSU units available online in the System. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the count changes from its expected baseline, since that would indicate the underlying set of items changed unexpectedly. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
jnxPsuMIB	1.3.6.1.4.1.2636.3.58.1			The Juniper Supply Unit MIB definitions for enabling power monitoring and management of a juniper device.
jnxPsuNotifications	1.3.6.1.4.1.2636.3.58.1.1
jnxPsuObjects	1.3.6.1.4.1.2636.3.58.1.2
jnxPsuScalars	1.3.6.1.4.1.2636.3.58.1.2.1
INT jnxPsuAvailableDeviceCountEx	1.3.6.1.4.1.2636.3.58.1.2.1.1	INTEGER	read-only	Gives the number of PSU units available online in the System.
INT jnxPsuAvailableAveragePowerSupply	1.3.6.1.4.1.2636.3.58.1.2.1.2	INTEGER	read-only	Gives the total average power that the System can supply from the available online units in Watts.
INT jnxPsuAvailableMaxPowerSupply	1.3.6.1.4.1.2636.3.58.1.2.1.3	INTEGER	read-only	Gives the total maximum power that the System can supply from the available online units in Watts.
INT jnxPsuRedundancy	1.3.6.1.4.1.2636.3.58.1.2.1.4	INTEGER	read-only	PSU power redundancy configuration.
INT jnxPsuChassisPowerReserved	1.3.6.1.4.1.2636.3.58.1.2.1.5	INTEGER	read-only	Power reserved for Chassis in Watts.
INT jnxPsuChassisPowerAllocated	1.3.6.1.4.1.2636.3.58.1.2.1.6	INTEGER	read-only	Total power allocated for chassis and all the FPCs in Watts.
INT jnxPsuRedundantPowerAvailable	1.3.6.1.4.1.2636.3.58.1.2.1.7	INTEGER	read-only	Power(in Watts) that is still available for allocation even while supporting redundancy with the present usage.
INT jnxPsuTotalPowerAvailable	1.3.6.1.4.1.2636.3.58.1.2.1.8	INTEGER	read-only	Power(in Watts) which could be made available for further allocation without supporting any redundancy with the present usage.
INT jnxPsuChassisPowerConsumed	1.3.6.1.4.1.2636.3.58.1.2.1.9	INTEGER	read-only	Total power consumed by the entire system rounded to the nearest integer. This is calculated using the PowerFactor, Current and Voltage values of each PSU that is online and connected to the System.
INT jnxPsuTemperatureInflow	1.3.6.1.4.1.2636.3.58.1.2.1.10	INTEGER	read-only	Average inflow temperature calculated from all the available input sensors on the master RE.
INT jnxPsuTemperatureOutflow	1.3.6.1.4.1.2636.3.58.1.2.1.11	INTEGER	read-only	Average outflow temperature calculated from all the available output sensors on the master RE.
INT jnxPsuTemperatureInflowSamples	1.3.6.1.4.1.2636.3.58.1.2.1.12	INTEGER	read-only	The number of samples being taken while calculating jnxPsuTemperatureInflow.
INT jnxPsuTemperatureOutflowSamples	1.3.6.1.4.1.2636.3.58.1.2.1.13	INTEGER	read-only	The number of samples being taken while calculating jnxPsuTemperatureOutflow.
jnxPsuTable	1.3.6.1.4.1.2636.3.58.1.2.2		not-accessible	A list of power entries for each PSU component.
jnxPsuEntry	1.3.6.1.4.1.2636.3.58.1.2.2.1		not-accessible	Defines an entry in jnxPsuTable.
INT jnxPsuAvgPower	1.3.6.1.4.1.2636.3.58.1.2.2.1.1	INTEGER	read-only	Buffer that contains the average power used, in Watts for each component.
INT jnxPsuMaxPower	1.3.6.1.4.1.2636.3.58.1.2.2.1.2	INTEGER	read-only	Buffer that contains the max power available, in Watts for each component.
INT jnxPsuMode	1.3.6.1.4.1.2636.3.58.1.2.2.1.3	INTEGER	read-only	Mode for each PSU component.
INT jnxPsuOutletCount	1.3.6.1.4.1.2636.3.58.1.2.2.1.4	INTEGER	read-only	The number of outlets (regardless of their current state) present on this psu component, default is 0.
jnxPsuEnvironmentTable	1.3.6.1.4.1.2636.3.58.1.2.3		not-accessible	A list of PSU Environment entries.
jnxPsuEnvironmentEntry	1.3.6.1.4.1.2636.3.58.1.2.3.1		not-accessible	Defines an entry in jnxPsuEnvironmentTable.
INT jnxPsuThermalValue	1.3.6.1.4.1.2636.3.58.1.2.3.1.1	INTEGER	read-only	Temparature at each component in degrees Celsius rounded to the nearest integer.
INT jnxPsuHumidityValue	1.3.6.1.4.1.2636.3.58.1.2.3.1.2	INTEGER	read-only	Humidity at each component in percentage.
jnxPsuOutletTable	1.3.6.1.4.1.2636.3.58.1.2.4		not-accessible	Gives details of each Power outlet`s state, capacity to supply power, and other details.
jnxPsuOutletEntry	1.3.6.1.4.1.2636.3.58.1.2.4.1		not-accessible	A value contained within the OutletEntry
STR jnxPsuOutletName	1.3.6.1.4.1.2636.3.58.1.2.4.1.1	DisplayString	read-only	Outlet name associated to the power supply unit for each PSU Component.
STR jnxPsuOutletDescription	1.3.6.1.4.1.2636.3.58.1.2.4.1.2	DisplayString	read-only	Outlet description associated to the power supply unit for each PSU Component.
INT jnxPsuOutletAvgPower	1.3.6.1.4.1.2636.3.58.1.2.4.1.3	INTEGER	read-only	Buffer that contains the average power used, in Watts for each component.
INT jnxPsuOutletMaxPower	1.3.6.1.4.1.2636.3.58.1.2.4.1.4	INTEGER	read-only	Buffer that contains the maximum power available, in Watts for each component.
INT jnxPsuOutletCurrent	1.3.6.1.4.1.2636.3.58.1.2.4.1.5	INTEGER	read-only	PSU output current in milliamps rounded to the nearest integer.
INT jnxPsuOutletStatus	1.3.6.1.4.1.2636.3.58.1.2.4.1.8	INTEGER	read-only	The value of the operational status for the given outlet. This can also be used to set the outlet state
INT jnxPsuOutletVoltage	1.3.6.1.4.1.2636.3.58.1.2.4.1.9	INTEGER	read-only	Output voltage in Volts rounded to the nearest integer.
INT jnxPsuOutletPowerFactorValue	1.3.6.1.4.1.2636.3.58.1.2.4.1.10	INTEGER	read-only	Power factor percentage of each PSU (2k/3k). Algorithm for calculation of Power Factor is below. For PowerOut values that fall in between 618.93W and 915.24W, say 700W, the appropriate PF ranges from 0.910191 & 0.917994. Following linear equation could help deduce a fairly accurate input power value. Linear equation y = mx + b (where m is the slope and b is the Y intercept) Slope m = (y2 - y1) / (x2 - x1) Y intercept b = y - mx Plugging it all together for our example: m = (915.24 - 618.93) / (0.917994 - 0.910191) = 37973.86 b = 915.24 - (37973.86 * 0.917994) = -33944.5 for 700W (y), our efficiency (x) would then be: x = (700 - (-33944.5)) / 37973.86 = 0.912326 = 91% PowerIn = 700W /0.912326 = 767.26W
INT jnxPsuOutletPowerConsumed	1.3.6.1.4.1.2636.3.58.1.2.4.1.11	INTEGER	read-only	Power Consumed by each outlet units in Watts.
jnxPsuFpcPowerTable	1.3.6.1.4.1.2636.3.58.1.2.5		not-accessible	A list of entries for each FPC(Flexible PIC Concentrator) giving it's assigned priority and power being allocated. More information on FPCs can be found in JUNIPER-MIB.
jnxPsuFpcPowerEntry	1.3.6.1.4.1.2636.3.58.1.2.5.1		not-accessible	A value contained within the FpcPowerEntry
INT jnxPsuFpcPowerPriority	1.3.6.1.4.1.2636.3.58.1.2.5.1.1	INTEGER	read-only	The Power budget priority assigned to the FPC. Lower number means higher priority.
INT jnxPsuFpcPowerAllocated	1.3.6.1.4.1.2636.3.58.1.2.5.1.2	INTEGER	read-only	The Power allocated to the FPC in Watts.

RFC description

Enables power supply monitoring and management of PSU units in Juniper devices.

Start monitoring Juniper Networks chassis-based router/switch (power supply unit health) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

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