Figure 12-1 Principles Of Snmp - Raisecom ISCOM2600G-HI (A) Series Configuration Manual

Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
Principles
A SNMP system consists of two parts: Agent and the NView NNM system. The Agent and the
NView NNM system communicate through SNMP packets sent through UDP. Figure 12-1
shows the SNMP principle.

Figure 12-1 Principles of SNMP

The Raisecom NView NNM system can provide friendly Human Machine Interface (HMI) to
facilitate network management. The following functions can be implemented through it:


The Agent is a program installed on the managed device, implementing the following
functions:



An Agent can be configured with several versions, and different versions
communicate with different NMSs. But SNMP version of the NMS must be consistent
with that of the connected agent so that they can intercommunicate properly.
Version of protocol
Till now, SNMP has three versions: v1, v2c, and v3, described as below.


Send request packets to the managed device.
Receive reply packets and Trap packets from the managed device, and show result.
Receive/Reply request packets from the NView NNM system
To read/write packets and generate replay packets according to the packets type, then
return the result to the NView NNM system
Define trigger condition according to protocol modules, enter/exit system or restart the
ISCOM2600G-HI series switch when conditions are satisfied; replying module sends
Trap packets to the NView NNM system through agent to report current status of the
ISCOM2600G-HI series switch.
SNMPv1 uses community name authentication mechanism. The community name, a
string defined by an agent, acts like a secret. The network management system can visit
the agent only by specifying its community name correctly. If the community name
carried in a SNMP packet is not accepted by the ISCOM2600G-HI series switch, the
packet will be discarded.
Compatible with SNMPv1, SNMPv2c also uses community name authentication
mechanism. SNMPv2c supports more operation types, data types, and errored codes, and
thus better identifying errors.
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
12 System management
484