HP SNMP/XL User's Guide (36922-90036)

Chapter 1 19
Introduction to HP SNMP/XL
Product Structure
Product Structure
The two major components of HP SNMP/XL that you will use are:
• The SNMP stack
• SNMPUTIL
The SNMP Stack
The SNMP stack runs as a system process and is the backbone of
HP SNMP/XL. Its main functions are:
• To provide the interface to the network via the UDP (User Datagram
Protocol) interface.
• To perform the ASN.1 encoding/decoding for both incoming and
outgoing PDUs (Protocol Data Units).
• To provide event message services.
• To access MIB data for the agent.
The SNMP stack interfaces to the connectionless mode transport
service (UDP subsystem) via NetIPC. Other subsystems that are used
include the MPE/XL ports subsystem and the MPE/XL process
management subsystem.
SNMPUTIL
The SNMPUTIL is a program file that provides the following functions:
• Manually startup and shutdown the SNMP stack.
• Generate SNMP requests and format responses back to the user.
• Generate SNMP traps.
• Access diagnostics information.
— Enable tracing.
— Enable logging.
— Obtain version reporting.
— Obtain subsystem status.
You may use SNMPUTIL to manually startup or shutdown SNMP.
(Normally, SNMP is started and stopped automatically when the
transport is started or stopped.) SNMPUTIL is then responsible for
creating the SNMP process on startup and sending a shutdown