slEntPhysicalSerialNum

The vendor-specific serial number string for the physical
entity.  The preferred value is the serial number string
actually printed on the component itself (if present).
              
On the first instantiation of an physical entity, the value
of slEntPhysicalSerialNum associated with that entity is set
to the correct vendor-assigned serial number, if this
information is available to the agent.  If a serial number
is unknown or non-existent, the slEntPhysicalSerialNum will be
set to a zero-length string instead.
              
Note that implementations which can correctly identify the
serial numbers of all installed physical entities do not
need to provide write access to the slEntPhysicalSerialNum
object. Agents which cannot provide non-volatile storage for
the slEntPhysicalSerialNum strings are not required to
implement write access for this object.
              
Not every physical component will have a serial number, or
even need one.  Physical entities for which the associated
value of the slEntPhysicalIsFRU object is equal to 'false(2)'
(e.g., the repeater ports within a repeater module), do not
need their own unique serial number. An agent does not have
to provide write access for such entities, and may return a
zero-length string.
              
If write access is implemented for an instance of
slEntPhysicalSerialNum, and a value is written into the
instance, the agent must retain the supplied value in the
slEntPhysicalSerialNum instance associated with the same
physical entity for as long as that entity remains
instantiated. This includes instantiations across all re-
initializations/reboots of the network management system,
including those which result in a change of the physical
entity's slEntPhysicalIndex value.

MIB

SL-ENTITY-MIB

OID

.1.3.6.1.4.1.4515.1.3.6.1.1.1.7

Type

column

Access

readonly

Status

current

Parent

slEntPhysicalEntry

Table

slEntPhysicalTable

Siblings

22