14' Network Management System NMS

1
14. Network Management System (NMS)

• Jae Ki Lee
• ljk_at_mcl.kaist.ac.kr
• 2006. 06. 13
• Tel [phone]

2
Basic Concepts of SNMP

• The Infrastructure for Network Management
  (Client-Server Model)

3
Management Information Base
4
Management Information Base
SMI (Structure of Management Information)
MIB
MIB Module
MIB Module
MIB Object
MIB Object
MIB Object
MIB Object
MIB Object
MIB Object
Written by ASN.1
ASN. 1 (Abstract Notation One)
5
Object Identifiers in MIB
6
SNMP Protocol Understanding the Protocol
7
SNMP Protocol Understanding the Protocol

• SNMPv2 messages
• GetRequest (port 161)
• Get value of one or more MIB object instances
• GetNextRequest (port 161)
• Get value of next MIB object instance in list or
  table
• GetBulkRequest (port 161)
• Get values in large block of data, for example
• InformRequest (port 161)
• Inform remote managing entity of MIB values
  remote to its access
• SetRequest (port 161)
• Set value of one or more MIB object instances
• Response (port 162)
• Generated in response to above requests.
• SNMPv2-Trap (port 162)
• Inform manager of an exceptional event

8
SNMP Protocol Understanding the Protocol
9
Lab. 1 NET-SNMP install and configuration

• Installing snmp tool on Linux or Unix platform
• Now your host is SNMP agent
• Understanding SNMP message by using basic SNMP
  manager application

NET-SNMP
NET-SNMP
10
Lab. 1 NET-SNMP install and configuration

• NET-SNMP (http//www.net-snmp.org)
• Widely used free SNMP tool ( on Linux platform or
  others )
• Formerly known as CMU-SNMP and UCD-SNMP
• Providing the followings
• Basically mib-2 module and other private mib
  moudules
• SNMP agent capability
• Simple SNMP manager application
• Many C APIs to develop SNMP agent and manager

11
Lab. 1 NET-SNMP install and configuration

• 1gt Install ( On Linux platform )
• You must download net-snmp v. 5.0 .
• After ./configure, make and make install ,
  you can execute agent daemon.
• /usr/local/sbin/snmpd
• From now this host is a SNMP agent.
• Programs and libraries are located in the
  following directories
• /usr/local/bin, /usr/local/sbin/,
  /usr/local/share/snmp, /usr/local/lib
• 2gt Configuration ( not necessarily for this lab.)
• execute /usr/local/bin/snmpconf for configuration
• .conf files ( /usr/local/share/snmp/ )
• snmpd.conf snmp agent configuration
• snmptrapd.conf daemon configuration receiving
  agent trap message
• snmp.conf snmp application configuration

12
Lab. 1 NET-SNMP install and configuration

• 3gt Using basic SNMP manager applications
• usage example
• snmpget by the SNMP GET_Request message
• execute snmpgetnext, snmpwalk, snmptable,
  snmpset, snmptest, snmpstatus

/home snmpget mcl.kaist.ac.kr sysUpTime.0 -c
public RFC1213-MIBsysUpTime.0 Timeticks
(116730897) 13 days, 121508.97
13
Lab. 2 Management Information Exchange between
Agent and Manager via SNMP
MG-Soft MIB Browser NET-SNMP
NET-SNMP
14
Lab. 2 Management Information Exchange between
Agent and Manager via SNMP

• 1gt Use of MG-Soft MIB Browser (MG-Soft MIB
  Browser)

15
Lab. 2 Management Information Exchange between
Agent and Manager via SNMP

• 2gt Manager Implementation (NET-SNMP)
• Step A) Read and understand the Programming a
  Simple Application part on the website.
• URL http//www.net-snmp.org/tutorial/tutorial-5/t
  oolkit/
• Step B) Read and understand the Programming a
  Synchronouse/Asynchronous Application part on
  the website
• URL http//www.net-snmp.org/tutorial/tutorial-5/t
  oolkit/
• Step C) Write a program searching SNMP agents in
  a given range of IP addresses.

16
Lab. 2 Management Information Exchange between
Agent and Manager via SNMP

• Step C) Write a program searching SNMP agents in
  a given range of IP addresses.
• Hint 1 Understand the programs for Step A and B
  briefly.
• Hint 2 You can check SNMP agent alive
• Request any object variable for the agent
• Check error message for the response

17
Lab. 2 Management Information Exchange between
Agent and Manager via SNMP

• 3gt Adding a New MIB Module in Agent (MG-Soft MIB
  Browser)
• Step 1) A MicrowareOven MIB module is provided.
• Step 2) Compile the MIB module using MG-Soft MIB
  compiler. Refer to the MIB Compiler User Manual
  material.
• Step 3) Add the MIB module to MG-Soft MIB
  browser.
• Step 4) Check the MIB module in the MIB tree of
  MG-Soft MIB browser.

18
Lab.3 Web-based Network Management

• Web-based Network Management using CGI

Management Station
Web Browser
NET-SNMP Agent
Agent
HTTP
Management Server
Http Server
SNMP
Manager
NET-SNMP Manager
19
Lab.3 Web-based Network Management

• 1gt Programming a CGI script
• Web based snmpget execution
• HTML interface form
• You can use any CGI script language.

20
Pre report and Main Report

• Pre report
• 1gt What are the five areas of network management
  defined by the ISO?
• 2gt Briefly describe CMIP, and briefly compare
  SNMP to CMIP.
• 3gt Briefly describe SNMP for various version.
• 4gt Describe network management model
  (Organization Model, Information Model,
  Communication Model and Functional Model). Refer
  to the chapter 6 on the website
  (sharp.kaist.ac.kr/ccna4).
• Main report
• 1gt Follow above lab 1,2,3 and describe the result
• 2gtDescribe various network management
  architectures (Centralized/Hierarchical/Distribute
  d Network Management Architecture). Refer to the
  chapter 6 on the website (sharp.kaist.ac.kr/ccna4
  ).