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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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SNMP Overview

SNMP Overview

This section describes the definition, purpose, version evolution and benefits of SNMP.

Definition

The Simple Network Management Protocol (SNMP) is a network management protocol widely used in the TCP/IP network. SNMP is a method of managing network elements through a network console workstation which runs network management software. SNMP has the following features:
  • Simplicity: SNMP applies to small-scale networks requiring high speed and low costs because it uses a polling mechanism and provides basic functions. SNMP uses UDP packets, and is therefore supported by most devices.

  • Powerfulness: SNMP ensures the transmission of management information between any two devices on the network, thereby allowing the network administrator to query information, locate faults on any device.

Purpose

As networks rapidly develop and applications become more diversified, network management becomes difficult due to the following factors:
  • The number of network devices is dramatically increasing, which increases the network administrator's workload. In addition, networks' coverage areas are constantly being expanded, making real-time monitoring and fault location of network devices difficult.

  • Various devices exist on the network, and management interfaces provided by different vendors differ from each other. This makes the network management complex.

To address this problem, SNMP was developed. SNMP supports efficient batch management on network devices and filters differences between products. SNMP allows unified management regardless of the device type and vendor.

Version Evolution

In May 1990, RFC 1157 was developed to define the first SNMP version: SNMPv1. RFC 1157 provides a systematic method for monitoring and managing the network. SNMPv1 cannot ensure the security of the network because it is based on community-name authentication, and only a few error codes are returned.

Later, Internet Engineering Task Force (IETF) released SNMPv2c. SNMPv2c introduced GetBulk and Inform and supported more standard error codes and data types (including the Counter64 and Counter32)

Because SNMPv2c did not provide a high level of security, the IETF released SNMPv3. SNMPv3 provides user security module-based (USM-based) encrypted authentication and view-based access control model (VACM).

Benefits

  • Improves the work efficiency of the network administrator. The network administrator can use SNMP to query information, modify information, and locate faults on any device.

  • Reduces management costs. SNMP provides basic functions for managing devices with different management tasks, physical attributes, and network types.

  • Reduces the impact of feature operations on the device. SNMP is simple in terms of hardware/software installation, packet type, and packet format.

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Updated: 2019-08-09

Document ID: EDOC1000041694

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