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Description
SNMP (Simple Network Management Protocol) was designed as the standard language to be used by all computers on a network. The SNMP protocol is used by network management systems to communicate with network elements to monitor and control different aspects of the equipment.
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The SNMP Manager
The SNMP Agent.
SNMP Manager
An SNMP Manager is an application that performs the operational roles of generating requests to modify and retrieve management information and receiving the requested information and trap-event reports that are generated by the SNMP agent. SNMP management applications such as SNMPC etc. can be used and have been verified to operate on to SNMP Agent (VEGA). The VEGA is not limited to the SNMP manager applications mentioned here. Other applications can be utilized, but the applications mentioned above have been verified.
SNMP Agent
An SNMP Agent is an application that performs the operational role of receiving and processing requests, sending responses to the manager, and sending traps when an event occurs. VEGA acts as an SNMP Agent.
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The SNMP Agent responds with a GetResponse message. If a specific condition or event occurs the SNMP Agent sends a Trap message to the Manager for viewing.
SNMP BASIC INFORMATION / DEFINITIONS
Below table show basic information with respect to SNMP Termnologies used as a part of SNMP network
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NOTE VEGA only supports private MIB's (Enterprise MIB's) that is specifc to VEGA |
SNMP Implementation on VEGA
There are mainly three different versions of SNMP which are implemented on VEGA as show below:
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Below is the information with respect to different SNMP versions:
SNMP version 1 (SNMPv1)
Below are the key points with respect to SNMP version 1:
SNMPv1 was the first version of SNMP.
Defines limited, easily implemented MIB of scalar variables and two dimensional tables and has limited functionality
Although it accomplished its goal of being an open, standard protocol, it was found to be lacking in key areas for certain applications like security etc.
SNMP version 2 (SNMPv2c)
SNMPv2c is a sub-version of SNMPv2. Below are the key points points with respect to the same:
Protocol use to exchange management information
Its key advantage over previous versions is the Inform command. Unlike Traps, which are simply received by a manager, Informs are positively acknowledged with a response message.
If a manager does not reply to an Inform, the SNMP agent will resend the Inform.SNMPv2 with community-based security allows for configuration of an agent for authentication, encryption, data access, and trap management.
Improved error handling
Improved SET commands
To utilize the SNMPv2c features, one must have an SNMP Manager Application loaded on a PC which supports SNMPv2c. SNMPv2c will monitor DS1, DS3 and Ethernet Interfaces using industry standards MIBs
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NOTE Not all devices are SNMPv2c compliant, so your SNMP manager should be downward compatible with SNMPv1 devices. |
SNMP version 3 (SNMPv3)
SNMPv3 is the newest version of SNMP. Its primary feature is enhanced security.
The "EngineID" Identifier in SNMPv3 uniquely identifies each SNMP entity. Conflicts can occur if two SNMP entities have duplicate EngineID's. The EngineID is used to generate the key for authenticated messages.
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