D-Link DES-3226 User Manual page 35

- Physical Entity
A "physical entity" or "physical component" represents
an identifiable physical
resource within a managed system. Zero or more
logical entities may utilize a physical resource at any
given time. It is an implementation-specific manner as
to which physical components are represented by an
agent in the EntPhysicalTable.
resources (e.g., communications ports, back planes,
sensors, daughter-cards, power supplies, the overall
chassis) which can be managed via
Functions associated with one or more logical entities
are included in the MIB.
- Containment Tree
Each
'contained' within another physical component. A
"containment-tree" is the conceptual sequence of
entPhysicalIndex values which uniquely specifies the
exact physical location of a physical component
within the managed system. It is generated by 'following
and recording' each 'entPhysicalContainedIn' instance
'up the tree towards the root', until a value of zero
indicating no further containment is found.
The Entity Physical Table can be accessed by choosing Entity under
Configuration and then Physical Table. This table contains one row per
physical entity. There is always at least one row for an 'overall' physical entity.
DES-3226 Management
physical component may
Typically, physical
be modeled as
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