Snmp simple network management protocol haris ribic
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SNMP Simple Network Management Protocol Haris Ribic. Objectives. History What is SNMP? Management Station Management Agent Management Information Base Network Management Protocol How does SNMP work? Architecture Bibliography. History. Networks became vital and more complicated

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SNMP Simple Network Management Protocol Haris Ribic

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Snmp simple network management protocol haris ribic

SNMPSimple Network Management ProtocolHaris Ribic


Objectives

Objectives

  • History

  • What is SNMP?

    • Management Station

    • Management Agent

    • Management Information Base

    • Network Management Protocol

  • How does SNMP work?

  • Architecture

  • Bibliography


History

History

  • Networks became vital and more complicated

    • Cannot be managed by human effort alone

  • Simple Gateway Monitoring Protocol (SGMP)

    • Did not work with equipment from different vendors

  • Internet Activities Board (IAB) - Network Management System

    • Need for an automated management tool for TCP/IP network and Internet

    • Standards required to allow multi-vendor networks

    • View the entire network as a unified architecture

    • Single operator interface

    • Powerful, user friendly command set

  • SNMP - RFC 1067 - August 1988

    • J. Case

    • M. Fedor

    • M. Schoffstall

    • J. Davin


What is snmp

What is SNMP?

  • Network management software for networks operating TCP/IP model

    • Application Layer TCP/IP - OSI

    • Variety of Operating Systems

  • SNMP network management - 4 key elements

    • Management Station

    • Management Agent

    • Management Information Base

    • Network Management Protocol

  • Simple Network Management Protocol version 1 (SNMPv1)

    - Protocol that enables a management station to configure, monitor network devices

  • Simple Network Management Protocol version 2 (SNMPv2)

    - Update provides additional administrative structure, authentication, and privacy

    - SNMPv1 and SNMPv2 are incompatible

  • Simple Network Management Protocol version 3 (SNMPv3)

    - Update provides additional security and administrative capabilities


Management station

Management Station

  • Standalone device or part of a shared system

  • Interface for human network manager

  • Has management applications

  • Interface to monitor and control network

  • Platforms, such as hosts, bridges, routers, and hubs

  • Equipped with agent software so they can be managed

  • Responds to requests for information

  • Responds to requests for action

  • Asynchronously supply important but unsolicited information

  • Management Agent


Snmp simple network management protocol haris ribic

  • Management Information Base (MIB)

  • Representation of network resources as objects

  • Each object is a data variable that represents one aspect of managed agent

    • Standardized across system

  • Collection of objects is referred to as a MIB

    • Collection of access points for the management station

  • Management station

    • Retrieves values of MIB objects to provide monitoring

    • Sets MIB object values to change configuration

  • Link between management station and agent

    • TCP/IP uses SNMP

    • SNMPv2 for OSI & TCP/IP

  • Key capabilities

    • get - management station retrieves value

    • set - management station sets value

    • notify - agent sends event notification

  • Network Management Protocol


How does snmp work

How does SNMP work?

  • Network management software

    • Controls devices connected to a network

    • Manages performance, solves problems, optimizes network

    • Firewall

  • Community

    • Devices store information about the community

    • Command input limited to certain machines

    • MIB contains communication information

      • Protocols

      • Device identifications


Snmp architecture

SNMP Architecture

  • Application-level protocol of the TCP/IP model

  • Operates on top of UDP

  • Typical configuration:

    • Standalone management station

      • Manager process controls access to a central MIB

      • Provides an interface to the network manager

    • SNMP, UDP, IP and network dependent protocol (Ethernet, ATM)

      • Each agent must be implemented same way


Snmp architecture1

SNMP Architecture

  • Closer look:

    • Management station issues 3 messages

    • All 3 are acknowledged by the agent

    • May issue a trap message - something undesirable happens

  • Relies on UDP - connectionless protocol

    • No ongoing connections are maintained

    • Each exchange is a separate transaction


Bibliography

Bibliography

Pictures:

Stallings, William. Data and Computer Communications. 8th ed. New Jersey: Pearson Prentice Hall, 2007. 760-771.

Information:

Stallings, William. Data and Computer Communications. 8th ed. New Jersey: Pearson Prentice Hall, 2007. 760-771.

"Cisco Documentation." cisco.com. 12 Oct. 2006. Feb. 2008 <http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/snmp.htm>.

"Simple Network Management Protocol." Wikipedia. 10 Jan. 2008. Feb. 2008 <http://en.wikipedia.org/wiki/Simple_Network_Management_Protocol#SNMP_basic_components>.


Snmp simple network management protocol haris ribic

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