CERENT-ENVMON-MIB

All MIBs › CERENT-ENVMON-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2004-01-27

Category: Alarm and Event Management, Hardware and Environment, Optical and WDM, Vendor: Cisco ONS/Cerent

Description: Monitors environmental conditions including temperature, voltage, and fan status on Cisco/Cerent ONS optical networking equipment.

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What Is CERENT-ENVMON-MIB?

CERENT-ENVMON-MIB is a Cisco (originally Cerent, for its ONS optical transport platforms) proprietary MIB providing environmental status monitoring, covering voltage and temperature conditions on the chassis. It exposes per-sensor voltage and temperature statistics tables, each with a description, current reading, and four configurable threshold levels (very-high, high, low, very-low), allowing fine-grained threshold-based alerting. This is explicitly and entirely a hardware-health monitoring MIB: it lets an administrator track real-time voltage and temperature readings against configured thresholds to catch power-supply or cooling problems before they cause a card or chassis failure. It is a self-contained proprietary MIB without a stated dependency on another standard MIB, though it parallels the general pattern of IETF ENTITY-SENSOR-MIB style environmental monitoring. It is typically deployed on Cisco ONS optical transport shelves and cards in service-provider and enterprise optical transport networks, and administrators can download the CERENT-ENVMON-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CERENT-ENVMON-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

Cisco/Cerent ONS optical transport shelves and cards

Monitoring Examples

An operator would poll cerentEnvMonVoltageStatsTable/cerentEnvMonVoltageStatsEntry to read cerentEnvMonVoltageStatsCurrentValue against cerentEnvMonVoltageStatsThresholdHigh and cerentEnvMonVoltageStatsThresholdVeryHigh for each cerentEnvMonVoltageStatsDescr sensor, and similarly poll cerentEnvMonTemperatureStatsTable/cerentEnvMonTemperatureStatsEntry for temperature readings. A voltage reading crossing cerentEnvMonVoltageStatsThresholdVeryLow would reveal a failing power supply rail, while a temperature reading exceeding its high threshold would indicate a cooling fault or blocked airflow on the optical shelf.

What Can Be Monitored

per-sensor voltage readings vs. thresholds
per-sensor temperature readings vs. thresholds
voltage/temperature threshold breach alarms

Imported Objects

From CERENT-GLOBAL-REGISTRY

cerentGeneric	OBJECT-IDENTITY
cerentModules	OBJECT-IDENTITY
cerentRequirements	OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Gauge32
Integer32
MODULE-IDENTITY
OBJECT-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString

How to Use in IPNetwork Monitor

Example using cerentEnvMonTemperatureStatsCurrentValue OID:

Select a Cisco ONS optical transport platform (formerly Cerent) 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 cerentEnvMonTemperatureStatsCurrentValue 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. It reports the current Temperature measurement at this temperature sensor. 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 a Gauge32-type OID, Value bounds is the most useful condition here — trigger an alert if the reported value exceeds the level expected for healthy operation, since sustained high temperature often precedes thermal shutdown or hardware degradation. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
cerentEnvMonMIB	1.3.6.1.4.1.3607.1.10.120			This MIB module provides Environmental status information
cerentEnvMonObjects	1.3.6.1.4.1.3607.2.80
cerentEnvMonVoltageStatsTable	1.3.6.1.4.1.3607.2.80.10		not-accessible	This table maintains the status info for all EnvMon related voltages picked up by the sensors in the device.
cerentEnvMonVoltageStatsEntry	1.3.6.1.4.1.3607.2.80.10.1		not-accessible	There will as many rows as there are sensors in the device.
I32 cerentEnvMonVoltageStatsIndex	1.3.6.1.4.1.3607.2.80.10.1.10	Integer32	not-accessible	The value index uniquely indicates the voltage sensor in the device.
STR cerentEnvMonVoltageStatsDescr	1.3.6.1.4.1.3607.2.80.10.1.20	DisplayString	read-only	Unique Name/Description of the voltage sensor.
I32 cerentEnvMonVoltageStatsCurrentValue	1.3.6.1.4.1.3607.2.80.10.1.30	Integer32	read-only	Current voltage measurement at this voltage sensor.
I32 cerentEnvMonVoltageStatsThresholdVeryHigh	1.3.6.1.4.1.3607.2.80.10.1.40	Integer32	read-only	If the current voltage value exceeds this threshold value, an alarm event will be raised by the device. The severity of this event may be provisionable.
I32 cerentEnvMonVoltageStatsThresholdHigh	1.3.6.1.4.1.3607.2.80.10.1.50	Integer32	read-only	If the current voltage value exceeds this threshold value, a warning event will be raised by the device. The severity of this event may be provisionable.
I32 cerentEnvMonVoltageStatsThresholdLow	1.3.6.1.4.1.3607.2.80.10.1.60	Integer32	read-only	If the current voltage value falls below this threshold value, a warning event will be raised by the device. The severity of this event may be provisionable.
I32 cerentEnvMonVoltageStatsThresholdVeryLow	1.3.6.1.4.1.3607.2.80.10.1.70	Integer32	read-only	If the current voltage value falls below this threshold value, an alarm event will be raised by the device. The severity of this event may be provisionable.
cerentEnvMonTemperatureStatsTable	1.3.6.1.4.1.3607.2.80.20		not-accessible	This table provides ambient temperature information as measured by the temperature sensors.
cerentEnvMonTemperatureStatsEntry	1.3.6.1.4.1.3607.2.80.20.1		not-accessible	Each temperature is represented by a row in the table.
I32 cerentEnvMonTemperatureStatsIndex	1.3.6.1.4.1.3607.2.80.20.1.10	Integer32	not-accessible	The value index uniquely indicates the temperature sensor in the device.
STR cerentEnvMonTemperatureStatsDescr	1.3.6.1.4.1.3607.2.80.20.1.20	DisplayString	read-only	Unique Name/Description of the temperature sensor.
G32 cerentEnvMonTemperatureStatsCurrentValueEx	1.3.6.1.4.1.3607.2.80.20.1.30	Gauge32	read-only	Current Temperature measurement at this temperature sensor.
G32 cerentEnvMonTemperatureStatsThresholdHigh	1.3.6.1.4.1.3607.2.80.20.1.40	Gauge32	read-only	If the current temperature value exceeds this threshold value, an alarm event will be raised by the device. The severity of this event may be provisionable.
cerentEnvMonMibConformance	1.3.6.1.4.1.3607.5.70			This node is created for compliance. Has objects as required by the RFCs
cerentEnvMonMibCompliance	1.3.6.1.4.1.3607.5.70.10			The compliance statements for Cisco ONS devices.
cerentEnvMonMibBasicCompliance	1.3.6.1.4.1.3607.5.70.10.10			The basic implementation requirements for all Cisco ONS network devices.
cerentEnvMonMibGroups	1.3.6.1.4.1.3607.5.70.20			All the objects and events are grouped under this for conformance
cerentEnvMonMibObjectsGroup	1.3.6.1.4.1.3607.5.70.20.10			All NMS accessible objects

RFC description

Monitors environmental status including voltage, temperature, and power for Cisco ONS devices.

Start monitoring Cisco ONS optical transport platforms (formerly Cerent) 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 CERENT-ENVMON-MIB