Dell-HWENVIROMENT

All MIBs › Dell-HWENVIROMENT

Organization: Dell

Last Updated: 2003-09-21

Category: Domain: Power Management, Domain: Server Hardware, Vendor: Dell

Description: Monitors hardware environmental sensors including temperature, fans, and power supplies on Dell devices.

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What Is Dell-HWENVIROMENT?

Dell-HWENVIROMENT is a Dell proprietary MIB dedicated to monitoring the physical hardware environment of Dell network devices, covering cooling fans and power supply units. It exposes per-fan and per-power-supply status tables describing each unit's operational state, along with supply source and airflow direction details. Its primary purpose is directly monitoring hardware health, specifically fan operational status and power supply state and source (e.g. AC/DC, redundant supply presence), which are critical early-warning indicators for overheating or power redundancy loss on a switch. It is a self-contained vendor MIB, though it parallels the environment-monitoring style of the standard CISCO-ENVMON-MIB/ENTITY-MIB pattern used across the industry. It is deployed on Dell PowerConnect/Networking switch chassis, where Dell-HWENVIROMENT SNMP monitoring alerts operators to fan failures or power supply degradation before they cause a thermal shutdown or outage.

IPNetwork Monitor allows you to monitor SNMP objects defined in Dell-HWENVIROMENT. 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

Dell PowerConnect/Networking switch (chassis with fans/power supplies)

Monitoring Examples

An operator would poll rlEnvMonFanStatusTable/rlEnvMonFanStatusEntry (indexed by rlEnvMonFanStatusIndex) checking rlEnvMonFanState to detect a failed or degraded cooling fan identified by rlEnvMonFanStatusDescr, and similarly check rlEnvMonSupplyStatusTable/rlEnvMonSupplyStatusEntry for rlEnvMonSupplyState and rlEnvMonSupplySource to confirm a redundant power supply is present and healthy. A fan reporting a failed state combined with rising chassis temperature (tracked elsewhere) would be an early signal to schedule hardware replacement before thermal shutdown.

What Can Be Monitored

fan operational status
fan description/identity
power supply status
power supply source (AC/DC)
power supply fan airflow direction

Imported Objects

From Dell-MIB

rnd	MODULE-IDENTITY

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using rlEnvMonSupplySource OID:

Select a Dell PowerConnect/Networking managed switch chassis (fan/power-supply hardware 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 rlEnvMonSupplySource into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The power supply source. unknown - Power supply source unknown ac - AC power supply dc - DC power supply externalPowerSupply - External power supply internalRedundant - Internal redundant power supply. 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 'unknown', or it changes unexpectedly, since which supply is correct depends on your power configuration and an unplanned change often indicates a failover. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
rlEnv	1.3.6.1.4.1.89.83			The private MIB module definition for environment of Dell devices.
rlEnvFanData	1.3.6.1.4.1.89.83.5
INT rlEnvFanDataAdminLevel	1.3.6.1.4.1.89.83.5.1.1.5	INTEGER	read-write	Configured fan speed level
RLE rlEnvFanDataDirection	1.3.6.1.4.1.89.83.5.1.1.6	RlEnvMonDirection	read-only	The direction of the system's fan.
rlEnvFanDataEntry	1.3.6.1.4.1.89.83.5.1.1		not-accessible	An entry of this table specifies a unit
INT rlEnvFanDataOperLevel	1.3.6.1.4.1.89.83.5.1.1.4	INTEGER	read-only	Fan speed operative level
INT rlEnvFanDataSpeed	1.3.6.1.4.1.89.83.5.1.1.3	INTEGER	read-only	Fan speed in RPM
INT rlEnvFanDataStackUnit	1.3.6.1.4.1.89.83.5.1.1.1	INTEGER	read-only	The number of the stack unit
rlEnvFanDataTable	1.3.6.1.4.1.89.83.5.1		not-accessible	For each unit in a stack
INT rlEnvFanDataTemp	1.3.6.1.4.1.89.83.5.1.1.2	INTEGER	read-only	The unit temperature
RLE rlEnvMonFanState	1.3.6.1.4.1.89.83.1.1.1.3	RlEnvMonState	read-only	The mandatory state of the fan being instrumented.
STR rlEnvMonFanStatusDescr	1.3.6.1.4.1.89.83.1.1.1.2	DisplayString	read-only	Textual description of the fan being instrumented. This description is a short textual label, suitable as a human-sensible identification for the rest of the information in the entry.
rlEnvMonFanStatusEntry	1.3.6.1.4.1.89.83.1.1.1		not-accessible	An entry in the fan status table, representing the status of the associated fan maintained by the environmental monitor.
INT rlEnvMonFanStatusIndex	1.3.6.1.4.1.89.83.1.1.1.1	INTEGER	not-accessible	Unique index for the fan being instrumented. This index is for SNMP purposes only, and has no intrinsic meaning.
rlEnvMonFanStatusTable	1.3.6.1.4.1.89.83.1.1		not-accessible	The table of fan status maintained by the environmental monitor.
RLE rlEnvMonSupplyFanDirection	1.3.6.1.4.1.89.83.1.2.1.5	RlEnvMonDirection	read-only	The direction of the power supply's fan.
INT rlEnvMonSupplySourceEx	1.3.6.1.4.1.89.83.1.2.1.4	INTEGER	read-only	The power supply source. unknown - Power supply source unknown ac - AC power supply dc - DC power supply externalPowerSupply - External power supply internalRedundant - Internal redundant power supply
RLE rlEnvMonSupplyState	1.3.6.1.4.1.89.83.1.2.1.3	RlEnvMonState	read-only	The mandatory state of the power supply being instrumented.
STR rlEnvMonSupplyStatusDescr	1.3.6.1.4.1.89.83.1.2.1.2	DisplayString	read-only	Textual description of the power supply being instrumented. This description is a short textual label, suitable as a human-sensible identification for the rest of the information in the entry.
rlEnvMonSupplyStatusEntry	1.3.6.1.4.1.89.83.1.2.1		not-accessible	An entry in the power supply status table, representing the status of the associated power supply maintained by the environmental monitor card.
INT rlEnvMonSupplyStatusIndex	1.3.6.1.4.1.89.83.1.2.1.1	INTEGER	not-accessible	Unique index for the power supply being instrumented. This index is for SNMP purposes only, and has no intrinsic meaning.
rlEnvMonSupplyStatusTable	1.3.6.1.4.1.89.83.1.2		not-accessible	The table of power supply status maintained by the environmental monitor card.
rlEnvPhysicalDescription	1.3.6.1.4.1.89.83.1

RFC description

Monitors environmental conditions on Dell devices, including temperature sensors, fan status, and power supply states.

Start monitoring Dell PowerConnect/Networking managed switch chassis (fan/power-supply hardware 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.

Download Dell-HWENVIROMENT