CTRON-ENVIRONMENT-MIB :: boardEnvTempMaxFanRelHot

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › CTRON-ENVIRONMENT-MIB › boardEnvTempMaxFanRelHot

boardEnvTempMaxFanRelHot

Module: CTRON-ENVIRONMENT-MIB

OID (symbolic): CTRON-ENVIRONMENT-MIB::boardEnvTempMaxFanRelHot

OID (numeric): 1.3.6.1.4.1.52.4.1.1.8.2.1.1.12

Node type: OBJECT-TYPE

Type: INTEGER

Access: read-only

Description: The temperature value above ambient at which the board temperature is deemed to be hot relative to ambient, with all fans in the chassis running at there maximum speed.

What is boardEnvTempMaxFanRelHot?

This is the configured relative-hot threshold used specifically when all chassis fans are already running at maximum speed, representing the worst-case cooling scenario. It tells an admin the point at which even full cooling effort isn't enough to keep the board within normal limits. For example, hitting this threshold while chEnvFanSpeed already reads 100 percent on all fans indicates the board is overheating despite maximum available cooling.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.52.4.1.1.8.2.1.1.12
snmpwalk -v2c -c public <target> CTRON-ENVIRONMENT-MIB::boardEnvTempMaxFanRelHot

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.52.4.1.1.8.2.1.1.12.1
snmpget -v2c -c public <target> CTRON-ENVIRONMENT-MIB::boardEnvTempMaxFanRelHot.1

Start monitoring Cabletron/Enterasys modular chassis switch/router/hub (environmental sensors) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the CTRON-ENVIRONMENT-MIB::boardEnvTempMaxFanRelHot OID value, configure state conditions and alerts, and monitor any Cabletron/Enterasys modular chassis switch/router/hub (environmental sensors) from a single console.

OID Breakdown

Upper-level ancestors (11 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.52cabletronCabletron-MIB
1.3.6.1.4.1.52.4mibsCT-PRIORITY-QUEUING
1.3.6.1.4.1.52.4.1ctronCTRON-MIB-NAMES
1.3.6.1.4.1.52.4.1.1ctPhysicalCTRON-MIB-NAMES
1.3.6.1.4.1.52.4.1.1.8ctenvCTRON-MIB-NAMES
Numeric OIDNameModule
1.3.6.1.4.1.52.4.1.1.8.2boardEnvCTRON-ENVIRONMENT-MIB
1.3.6.1.4.1.52.4.1.1.8.2.1boardEnvSlotTableCTRON-ENVIRONMENT-MIB
1.3.6.1.4.1.52.4.1.1.8.2.1.1boardEnvSlotEntryCTRON-ENVIRONMENT-MIB
1.3.6.1.4.1.52.4.1.1.8.2.1.1.12boardEnvTempMaxFanRelHotCTRON-ENVIRONMENT-MIB