Introduction to Networking for NonStop S-Series Servers

Managing Communications Subsystems
Introduction to Networking for HP NonStop S-Series Servers—520670-005
4-9
NonStop SNMP
Table 4-1. Key Components of an SNMP Environment
Component Description
SNMP Manager Station Device on which the SNMP manager runs.
SNMP Manager Application that automates the management of
network elements (managed resources) under the
control of one or more SNMP agents. HP provides an
SNMP agent on its NonStop Integrity systems.
The SNMP manager sends and receives responses
from SNMP agent through either of the following two
methods:
•
NonStop TCP/IP subsystem which supports LANs
and WANs.
•
Calls to the NonStop Kernel interprocess
communication (IPC) procedures, either locally or
over Expand, when the manager resides on
NonStop Kernel systems.
Protocol Data Units (PDU) Defined in RFCs, PDUs retrieve or change values or
send unsolicited notifications known as traps to an
SNMP manager.
Management Information Base
(MIB)
Information exchanged between managers and
agents. An MIB describes a collection of manageable
objects. An example of an MIB object is “the physical
location of a node.” MIBs are described in a language
known as Abstract Syntax Notation One (ASN.1).
Some MIBs are Internet MIBs defined in RFCs. Other
MIBs are vendor defined.
SNMP Agent SNMP agents access and modify values for MIB
objects on behalf of SNMP managers. An SNMP
manager can interpret MIB values when the SNMP
manager has access to a compiled version of the
ASN.1 MIB definition.
The SNMP agent acts as a server for any SNMP
network-management requester, providing information
about HP resources. Two MIB-II groups are supported
(System and SNMP) defined by RFC 1213,
Management Information Base for Network
Management of TCP/IP-Based Internets: MIB-II, and a
private group (zagInternal) that is defined by HP.
SNMP Subagent SNMP subagents handle a particular collection of
resources. Some subagents are implemented as
independent processes, and some are bound into
other processes, such as the agent process.