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The ENTITY-MIB and Extensions
This chapter describes the ENTITY-MIB and extensions:
Understanding the ENTITY-MIB and Extensions
The ENTITY-MIB provides basic management and identification of physical and logical entities within a network switch. Cisco support for the ENTITY-MIB focuses on the physical entities within a switch. This MIB provides details on each module, power supply, and fan tray within a switch chassis. It provides enough information to correctly map the containment of these entities within the switch.
Cisco has developed a number of private extensions to the ENTITY-MIB to provide more details for these physical entities. Each MIB extension shares the common index value, entPhysicalIndex, which allows the management application developer to link information across multiple MIBs.
The following table lists the Cisco MIB extensions that are linked to the ENTITY-MIB by entPhysical Index.
Table 1 ENTITY-MIB Extensions MIB
Description
CISCO-ENTITY-EXT-MIB
Extends the entity physical table for modules with processors. For each of these modules, this MIB provides memory statistics and LED information.
CISCO-ENTITY-FRU-CONTROL-MIB
Manages field replaceable units, such as power supplies, fans, and modules.
CISCO-ENTITY-SENSOR-MIB
Provides sensor data for environmental monitors such as temperature gauges.
CISCO-IMAGE-UPGRADE-MIB
Provides module image management based on entity physical index.