ceEntPhysicalSecondSerialNum

This object represents the vendor-specific second
serial number string for the physical entity. 
The first serial number string of the physical
entity is represented in the value of corresponding 
instance of the 'entPhysicalSerialNum' object.
              
On the first instantiation of an physical entity, the value
of this object is the correct vendor-assigned second 
serial number, if this information is available to the agent. 
              
If the second serial number is unknown or non-existent, then 
the value of this object will be a zero-length string instead.
              
Note that implementations which can correctly identify the
second serial numbers of all installed physical entities do 
not need to provide write access to this object. 
Agents which cannot provide non-volatile storage for the 
second serial number 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 entPhysicalIsFRU 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
'ceEntPhysicalSecondSerialNum', and a value is written into 
the instance, the agent must retain the supplied value in the
'ceEntPhysicalSecondSerialNum' 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 entPhysicalIndex value.

MIB

CISCO-ENTITY-EXT-MIB

OID

.1.3.6.1.4.1.9.9.195.1.4.1.1

Type

column

Access

readwrite

Status

current

Parent

ceExtEntPhysicalEntry

Table

ceExtEntPhysicalTable