BRCM-BATTERY-MGMT-MIB

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Organization: Broadcom Corporation

Last Updated: 2006-12-08

Category: Power Management

Description: Monitors battery status and charge levels for Broadcom cable gateway hardware.

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What Is BRCM-BATTERY-MGMT-MIB?

BRCM-BATTERY-MGMT-MIB is a Broadcom proprietary SNMP module for managing battery backup subsystems on Broadcom-based cable gateway/eMTA devices, such as those providing battery-backed VoIP service during power outages. It exposes hardware status data for the battery subsystem, including capacity, voltage range, measured voltage, validity/selection state, and charger status. Its core monitoring value is hardware health: battCapacity, battMeasuredVoltage, battEstimatedMinutesRemaining, and battEstimatedChargeRemaining let an operator track battery charge and remaining runtime, while battIsValid and battErrors flag a failed, missing, or faulted battery. It is a self-contained Broadcom enterprise MIB, though it typically sits alongside DOCSIS cable modem MIBs on the same device rather than depending on them directly. It is deployed on cable gateway/eMTA hardware from operators who need battery-backed voice service continuity, where the MIB lets NOC systems poll battery health remotely. Engineers can download the BRCM-BATTERY-MGMT-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in BRCM-BATTERY-MGMT-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

Broadcom-based cable gateway
cable eMTA/VoIP modem

Monitoring Examples

An administrator would poll batteryTable/batteryEntry indexed by battIndex to read battMeasuredVoltage against battMinimumVoltage/battMaximumVoltage, and check battEstimatedMinutesRemaining to see how long backup power would last during an outage. A battErrors value that is non-zero combined with battIsValid being false would reveal a failed or disconnected battery needing replacement before the next power event. battEstimatedChargeRemaining trending toward zero while battIsSelected is true would indicate the unit is actively drawing down its backup battery.

What Can Be Monitored

battery capacity
battery voltage (min/max/measured)
estimated minutes remaining
estimated charge remaining
battery validity/selection state
battery error conditions

Imported Objects

From BRCM-CABLEDATA-MGMT-MIB

cableDataMgmtMIBObjects

OBJECT-IDENTITY

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
DisplayString
TruthValue

From UPS-MIB

PositiveInteger

How to Use in IPNetwork Monitor

Example using battChargerState OID:

Select a Broadcom-chipset DOCSIS cable modems/gateway 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 battChargerState into the Find box to locate it in the OID tree, then select it and click OK. The current state of the battery charger. Note that all states may not be supported on all types of chargers. 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 value is 'forcedDischarge' or 'eternalSleep', since those indicate the battery charger has stopped normal charge cycling due to a fault. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
batteryMgmt	1.3.6.1.4.1.4413.50.1.1.2.1.10			Broadcom proprietary MIB for management of battery objects.
batteryMgmtBase	1.3.6.1.4.1.4413.50.1.1.2.1.10.1
batteryTable	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1		not-accessible	A table of batteries present on the system.
batteryEntry	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1		not-accessible	An entry describing the characteristics of an individual battery.
I32 battIndex	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.1	Integer32	not-accessible	Identifies the instance number of this individual battery.
U32 battCapacity	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.2	Unsigned32	read-only	The charge capacity of this battery.
U32 battMaximumVoltage	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.3	Unsigned32	read-only	The voltage at which this battery is considered to be fully charged. Note that if battChargerMaximumCharge is set to less than 100%, the battery will never be charged to this voltage.
U32 battMinimumVoltage	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.4	Unsigned32	read-only	The voltage at which this battery is considered to be fully discharged.
U32 battMeasuredVoltage	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.5	Unsigned32	read-only	The most recently measured voltage of this battery.
T/F battIsValid	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.6	TruthValue	read-only	Indicates whether this battery is considered valid by the battery charger. A value of false(2) here indicates some kind of failure with this battery.
T/F battIsSelected	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.7	TruthValue	read-only	Indicates whether this battery is currently selected for charging or discharging.
NUM battEstimatedMinutesRemaining	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.8	PositiveInteger	read-only	An estimate of the time to depletion of this battery's charge under the present load conditions if the utility power is off and remains off, or if it were to be lost and remain off.
INT battEstimatedChargeRemaining	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.9	INTEGER	read-only	An estimate of this battery's charge remaining expressed as a percent of full charge.
U32 battErrors	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.10	Unsigned32	read-only	Indicates the number of errors reported by the charger when trying to charge this battery. This object should always have a value of zero if all is well with the charger and the battery.
STR battEpromRevision	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.11	DisplayString	read-only	The version of the battery EPROM.
STR battPackSupplier	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.12	DisplayString	read-only	Battery Pack Supplier
STR battModelNumber	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.13	DisplayString	read-only	Battery Model Number.
STR battSerialNumber	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.14	DisplayString	read-only	Battery Serial Number.
STR battCellSupplier	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.15	DisplayString	read-only	Battery Cell Supplier.
STR battCellCapacity	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.16	DisplayString	read-only	Battery Cell Capacity.
STR battCellDateCode	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.17	DisplayString	read-only	Battery Cell Date Code(mmddyy).
STR battPackDateCode	1.3.6.1.4.1.4413.50.1.1.2.1.10.1.1.1.18	DisplayString	read-only	Battery Pack Date Code(mmddyy).
batteryCharger	1.3.6.1.4.1.4413.50.1.1.2.1.10.2
STR battChargerMicrocodeVersion	1.3.6.1.4.1.4413.50.1.1.2.1.10.2.1	DisplayString	read-only	The version of the battery charger microcode.
DAT battChargerMicrocodeBuildTime	1.3.6.1.4.1.4413.50.1.1.2.1.10.2.2	DateAndTime	read-only	The build date and time of the battery charger microcode.
U32 battChargerInputVoltage	1.3.6.1.4.1.4413.50.1.1.2.1.10.2.3	Unsigned32	read-only	The most recently measured input voltage to the battery charger. Typically, if operating on battery power, this value will approach zero. If operating on utility power, this value will approach the value of the power supplied to the device.
INT battChargerStateEx	1.3.6.1.4.1.4413.50.1.1.2.1.10.2.4	INTEGER	read-only	The current state of the battery charger. Note that all states may not be supported on all types of chargers.
U32 battChargerMaximumCharge	1.3.6.1.4.1.4413.50.1.1.2.1.10.2.5	Unsigned32	read-write	Specifies the level to which the charger should charge the batteries.
U32 battChargerReplaceBatteryThreshold	1.3.6.1.4.1.4413.50.1.1.2.1.10.2.6	Unsigned32	read-write	Specifies the minimum charge percentage that the battery must be able to reach when charging. If a battery cannot be charged above this percentage, it will be considered bad and battIsValid will transition to false(2).
U32 battChargerLowChargeThreshold	1.3.6.1.4.1.4413.50.1.1.2.1.10.2.7	Unsigned32	read-write	Specifies the charge percentage at which the bcmAlarmLowBatteryCharge will be raised.
batteryPowerMgmt	1.3.6.1.4.1.4413.50.1.1.2.1.10.3
batteryPowerMgmtInterfaces	1.3.6.1.4.1.4413.50.1.1.2.1.10.3.1
I32 battPowerMgmtCmDelay	1.3.6.1.4.1.4413.50.1.1.2.1.10.3.1.1	Integer32	read-write	Specifies the number of seconds following transition to battery power before the DOCSIS CM interface will enter power management mode. If set to -1, the interface will never enter power management mode and will remain at full power until utility power is restored or battery charge is depleted.
I32 battPowerMgmtEthernetDelay	1.3.6.1.4.1.4413.50.1.1.2.1.10.3.1.2	Integer32	read-write	Specifies the number of seconds following transition to battery power before the ethernet interface will enter power management mode. If set to -1, the interface will never enter power management mode and will remain at full power until utility power is restored or battery charge is depleted.
I32 battPowerMgmtUsbDelay	1.3.6.1.4.1.4413.50.1.1.2.1.10.3.1.3	Integer32	read-write	Specifies the number of seconds following transition to battery power before the USB interface will enter power management mode. If set to -1, the interface will never enter power management mode and will remain at full power until utility power is restored or battery charge is depleted.
I32 battPowerMgmtWiFiDelay	1.3.6.1.4.1.4413.50.1.1.2.1.10.3.1.4	Integer32	read-write	Specifies the number of seconds following transition to battery power before the WiFi interface will enter power management mode. If set to -1, the interface will never enter power management mode and will remain at full power until utility power is restored or battery charge is depleted.
I32 battPowerMgmtBluetoothDelay	1.3.6.1.4.1.4413.50.1.1.2.1.10.3.1.5	Integer32	read-write	Specifies the number of seconds following transition to battery power before the bluetooth interface will enter power management mode. If set to -1, the interface will never enter power management mode and will remain at full power until utility power is restored or battery charge is depleted.
I32 battPowerMgmtHpnaDelay	1.3.6.1.4.1.4413.50.1.1.2.1.10.3.1.6	Integer32	read-write	Specifies the number of seconds following transition to battery power before the HPNA interface will enter power management mode. If set to -1, the interface will never enter power management mode and will remain at full power until utility power is restored or battery charge is depleted.
batteryBcmAlarms	1.3.6.1.4.1.4413.50.1.1.2.1.10.4
bcmAlarmLowBatteryCharge	1.3.6.1.4.1.4413.50.1.1.2.1.10.4.1			The value of upsEstimatedChargeRemaining is less than or equal to the value of battChargerLowChargeThreshold.
bcmAlarmTempBadChargeSuspended	1.3.6.1.4.1.4413.50.1.1.2.1.10.4.2			The temperature of the device has exceeded operational limits for safe battery charging, and battery charging has been suspended.
bcmAlarmTempBadPowerReduced	1.3.6.1.4.1.4413.50.1.1.2.1.10.4.3			The temperature of the device has exceeded operational limits, and the device has been placed in low power mode in an to attempt to reduce heat production.
bcmAlarmBatteryMissing	1.3.6.1.4.1.4413.50.1.1.2.1.10.4.4			There are no batteries installed in the device and the device will not be capable of sustaining power in the event of utility power loss.
bcmAlarmTempBadDischargeInhibited	1.3.6.1.4.1.4413.50.1.1.2.1.10.4.5			The temperature of the device has exceeded operational limits for safe battery discharging, and battery discharging has been inhibited.

RFC description

Broadcom proprietary MIB for management of battery objects and battery monitoring in network devices.

Start monitoring Broadcom-chipset DOCSIS cable modems/gateways 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.

Download BRCM-BATTERY-MGMT-MIB