A GetNextRequest-PDU is generated and transmitted at the request of a
SNMPv2 application.
Upon receipt of a GetNextRequest-PDU, the receiving SNMPv2 entity
processes each variable binding in the variable-binding list to
produce a Response-PDU. All fields of the Response-PDU have the same
values as the corresponding fields of the received request except as
indicated below. Each variable binding is processed as follows:
The variable is located which is in the lexicographically ordered
list of the names of all variables which are accessible by this
request and whose name is the first lexicographic successor of the
variable binding's name in the incoming GetNextRequest-PDU. The
corresponding variable binding's name and value fields in the
Response-PDU are set to the name and value of the located variable.
If the requested variable binding's name does not lexicographically
precede the name of any variable accessible by this request, i.e.,
there is no lexicographic successor, then the corresponding
variable binding produced in the Response-PDU has its value field
set to `endOfMibView', and its name field set to the variable
binding's name in the request.
If the processing of any variable binding fails for a reason other
than listed above, then the Response-PDU is re-formatted with the
same values in its request-id and variable-bindings fields as the
received GetNextRequest-PDU, with the value of its error-status field
set to `genErr', and the value of its error-index field is set to the
index of the failed variable binding.
Otherwise, the value of the Response-PDU's error-status field is set
to `noError', and the value of its error-index field is zero.
The generated Response-PDU is then encapsulated into a message. If
the size of the resultant message is less than or equal to both a
local constraint and the maximum message size of the originator, it
is transmitted to the originator of the GetNextRequest-PDU.
Otherwise, an alternate Response-PDU is generated. This alternate
Response-PDU is formatted with the same values in its request-id
field as the received GetNextRequest-PDU, with the value of its
error-status field set to `tooBig', the value of its error-index
field set to zero, and an empty variable-bindings field. This
alternate Response-PDU is then encapsulated into a message. If the
size of the resultant message is less than or equal to both a local
constraint and the maximum message size of the originator, it is
transmitted to the originator of the GetNextRequest-PDU. Otherwise,
the snmpSilentDrops [9] counter is incremented and the resultant
message is discarded.
