Adtran L128T Manual Do Utilizador

61202.070L1-1

Express L128/L128T User Manual

Appendix C

SNMP

As Local Area Network (LAN) environments became standardized over the 
past ten years, multi-vendor equipment grew with competition.  It became 
necessary to manage the various vendor equipment from a single control con-
sole.  Thus, the Simple Network Management Protocol (SNMP) emerged as 
the de facto standard for managing commercial Transmission Control Proto-
col/Internet Protocol (TCP/IP) networks.

The term SNMP broadly refers to the message protocols used to exchange in-
formation between the network and the managed devices, as well as to the 
structure of network management databases.  SNMP has three basic compo-
nents:

•

  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.

•

  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 connected.

•

  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 manager to retrieve or modify a particular piece 
of information about a network device, the network manager transmits the re-
quest to that network device.  The agent in that device interprets the incoming 
request, performs the requested task, and sends its response to the network 
manager.  The network manager collects all the data from the various network 
devices and presents it in a consistent form.