User manual

61202156L1-1 TDU 120e User Manual A-1
Appendix A
SNMP
ABOUT SNMP
The term SNMP broadly refers to the message protocols used
to exchange information between the network and the
managed devices, as well as to the structure of network
management databases.
SNMP came about as local area network (LAN)
environments became standardized over the past ten years
and multi-vendor equipment grew with competition. It
became necessary to manage the various vendor equipment
from a single control console. Thus, the SNMP emerged as
the standard for managing commercial TCP/IP networks.
Basic Components of SNMP
SNMP has three basic components: Network Manager,
Agent, and MIB.
Network Manager
This is a control program that collects, controls, and presents
data pertinent to the operation of the network devices. It
resides on a network management station.
Agent
This is a control program that responds to queries and
commands from the network manager and returns requested
information or invokes configuration changes initiated by the
manager. It resides in each network device.
MIB
This is an index to the organized data within a network
device. It defines the operating parameters that can be
controlled or monitored. When requesting the network