â– An SNMP server (agent)
â– A Management Information Base (MIB)
SNMP defines a client-server model in which a client (manager) obtains information
from the server (agent) through two mechanisms:
â– A request/response protocol by which the client configures and monitors the
server. In this instance, the information is solicited.
â– Asynchronous notifications (called traps) by which the server, on its own initiative,
reports notable changes in the router’s status to the client. In this instance, the
information is unsolicited.
Terminology
Table 16 on page 148 provides definitions for the basic SNMP terms.
Table 16: SNMP Terminology
MeaningTerm
Also referred to as server; a managed device, such as a router, that collects
and stores management information
agent
Sometimes called a network management station (NMS) or simply a manager;
a device that executes management applications that monitor and control
network elements
client
A logical group of SNMP-managed devices and clients in the same
administrative domain
community
Refers to both a server and a cliententity
A condition or state change that may cause the generation of a trap messageevent
A characteristic of something that can be managed, such as a list of currently
active TCP circuits in a device
managed object
SNMPv3 term; a set of users with the same access privileges to the routergroup
Management Information Base; a collection of managed objects residing in
a virtual information store
MIB
Also known as a managed device; a hardware device, such as a PC or a routernetwork element
A message that indicates a status change (equivalent to a trap)notification
Also referred to as agent; a managed device, such as a router, that collects
and stores management information
server
Message sent by an SNMP server to a client to indicate the occurrence of a
significant event, such as a specifically defined condition or a threshold that
was reached. Managed devices use traps to asynchronously report certain
events to clients.
trap
148 â– Overview
JUNOSe 11.1.x System Basics Configuration Guide