14. Network Management System (NMS) Jae Ki Lee ljk@mcl.kaist.ac.kr 2006. 06. 13 Tel: 042-869-4435

Basic Concepts of SNMP The Infrastructure for Network Management (Client-Server Model)

Management Information Base

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)

Object Identifiers in MIB

SNMP Protocol: Understanding the Protocol

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

SNMP Protocol: Understanding the Protocol

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

Lab. 1 : NET-SNMP install and configuration 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

Lab. 1 : NET-SNMP install and configuration 1> 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 2> 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

Lab. 1 : NET-SNMP install and configuration 3> 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-MIB::sysUpTime.0 = Timeticks: (116730897) 13 days, 12:15:08.97

Lab. 2 : Management Information Exchange between Agent and Manager via SNMP MG-Soft MIB Browser NET-SNMP NET-SNMP

Lab. 2 : Management Information Exchange between Agent and Manager via SNMP 1> Use of MG-Soft MIB Browser (MG-Soft MIB Browser)

Lab. 2 : Management Information Exchange between Agent and Manager via SNMP 2> 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/toolkit/ Step B) Read and understand the ‘Programming a Synchronouse/Asynchronous Application’ part on the website Step C) Write a program searching SNMP agents in a given range of IP addresses.

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

Lab. 2 : Management Information Exchange between Agent and Manager via SNMP 3> 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.

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

Lab.3 : Web-based Network Management 1> Programming a CGI script Web based “snmpget” execution HTML interface form You can use any CGI script language.

Pre report and Main Report 1> What are the five areas of network management defined by the ISO? 2> Briefly describe CMIP, and briefly compare SNMP to CMIP. 3> Briefly describe SNMP for various version. 4> 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 1> Follow above lab 1,2,3 and describe the result 2>Describe various network management architectures (Centralized/Hierarchical/Distributed Network Management Architecture). Refer to the chapter 6 on the website (sharp.kaist.ac.kr/~ccna4).