3com DUA1750-2BAA01 Manual De Usuario

3Com Switch 8800 Configuration Guide 

Chapter 47  SNMP Configuration

 

47-1 

By far, the Simple Network Management Protocol (SNMP) has gained the most 

extensive application in the computer networks. SNMP has been put into use and 

widely accepted as an industry standard in practice. It is used for ensuring the 

transmission of the management information between any two nodes. In this way, 

network administrators can easily search and modify the information on any node on 

the network. In the meantime, they can locate faults promptly and implement the fault 

diagnosis, capacity planning and report generating. SNMP adopts the polling 

mechanism and provides the most basic function set. It is most applicable to the 

small-sized, fast-speed and low-cost environment. It only requires the unverified 

transport layer protocol UDP; and is thus widely supported by many other products. 

In terms of structure, SNMP can be divided into two parts, namely, Network 

Management Station and Agent. Network Management Station is the workstation for 

running the client program. At present, the commonly used NM platforms include Sun 

NetManager and IBM NetView. Agent is the server software operated on network 

devices. Network Management Station can send GetRequest, GetNextRequest and 

SetRequest messages to the Agent. Upon receiving the requests from the Network 

Management Station, Agent will perform Read or Write operation according to the 

message types, generate and return the Response message to Network Management 

Station. On the other hand, Agent will send Trap message on its own initiative to the 

Network Management Station to report the events whenever the device encounters any 

abnormalities such as restart.  

To uniquely identify the management variables of a device in SNMP messages, SNMP 

adopts the hierarchical naming scheme to identify the managed objects. It is like a tree. 

A tree node represents a managed object, as shown in the figure below. Thus the object 

can be identified with the unique path starting from the root.