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262 Nokia Network Voyager for IPSO 4.0 Reference Guide
GetNextRequest
The only values that can be returned as the second element in the variable-bindings field to a
GetNextRequest when an error-status code occurs are unSpecified or endOfMibView.
GetBulkRequest
The GetBulkRequest minimizes the number of protocol exchanges by letting an SNMPv2
manager request that the response be as large as possible given the constraints on the message
size.
The GetBulkRequest PDU has two fields that do not appear in the other PDUs: non-repeaters
and max-repetitions. The non-repeaters field specifies the number of variables in the variable-
bindings list for which a single-lexicographic successor is to be returned. The max-repetitions
field specifies the number of lexicographic successors to be returned for the remaining variables
in the variable-bindings list.
If at any point in the process, a lexicographic successor does not exist, the endofMibView value
is returned with the name of the last lexicographic successor, or, if there were no successors, the
name of the variable in the request.
If the processing of a variable name fails for any reason other than endofMibView, no values are
returned. Instead, the responding entity returns a response PDU with an error-status of genErr
and a value in the error-index field that is the index of the problem object in the variable-
bindings field.
Configuring SNMPv3
IPSO supports the user-based security model (USM) component of SNMPv3 to provide
message-level security. With
USM (described in RFC 3414), access to the SNMP service
is controlled on the basis of user identities. Each user has a name, an authentication pass
phrase (used for identifying the user), and an optional privacy pass phrase (used for
cryptographically protecting against disclosure of SNMP message payloads).
The system uses the MD5 hashing algorithm to provide authentication and integrity protection
and DES to provide encryption (privacy). Nokia recommends that you use both authentication
genErr If the processing of a variable fails for any other reason, the responding entity returns
genErr and a value in the error-index field that is the index of the problem object in the
variable-bindings field.
tooBig If the size of the message that encapsulates the generated response PDU exceeds a
local limitation or the maximum message size of the request’s source party, then the
response PDU is discarded and a new response PDU is constructed. The new
response PDU has an error-status of tooBig, an error-index of zero, and an empty
variable-bindings field.
Value Field Set Description