User guide

SS-1200-S, SS-2200-S and SS-4200-S Series Link Aggregating Taps92

The SNMP managed objects using a TimeStamp TC follow:

in the dcomPowerSupplyStatusTable - dcomPowerSupplyLastChange

A change in the value of a dcomPowerSupplyLastChange instance indicates the time at which a

power supply transitioned into its current state.

A value of zero(0) indicates that a power supply was already in its current state when the

SNMP agent last re-initialized.

4.3 Relationship to Other MIB Modules

This section discusses the relationship of this MIB module to MIB modules published by the

Internet Engineering Task Force (IETF).

4.3.1 ENTITY-MIB and ENTITY-STATE-MIB

The ENTITY-MIB and ENTITY-STATE-MIB are designed to expose management

information about the full inventory of components associated with a managed system. These

components include power supplies.

In contrast, this MIB module addresses the specific requirement for exposing management

information about just the power supplies associated with Datacom products. Other than power

supplies, no management information is exposed for components comprising Datacom products.

An SNMP agent that implements both the ENTITY-MIB and the ENTITY-STATE-MIB is

capable of exposing the same management information about power supplies as exposed by this

MIB module.

However, within the Internet community, the usual expectations for an implementation of the

ENTITY-MIB and ENTITY-STATE-MIB is for fully populated tables containing management

information about the complete inventory of components associated with a managed system.

Thus, this MIB module is used to expose management information relevant to power supplies

associated with Datacom products.

Note, that the use of this MIB module does not preclude the potential for future use of the

ENTITY-MIB and ENTITY-STATE-MIB for Datacom products.

4.4 Organization of This MIB Module

This MIB module organizes its object definitions into one conceptual table. This table is

discussed in the following section.

There are also two notification definitions contained in this MIB module. These notifications are

discussed in a subsequent section.