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Introduction to Internet Network Management

2. Table of Contents. BackgroundOrigins of InternetOrigins of Internet Network ManagementEvolution of SNMPSNMP Standards and RFCsSNMP Basic ConceptsNetwork Management ArchitectureSNMP Protocol ArchitectureProxies. 3. Internet Network Management. Also referred to as SNMP-based Network Manage

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Introduction to Internet Network Management

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    1. 1 Introduction to Internet Network Management J. Won-Ki Hong Dept. of Computer Science and Engineering POSTECH Tel: 054-279-2244 Email: jwkhong@postech.ac.kr

    2. 2 Table of Contents Background Origins of Internet Origins of Internet Network Management Evolution of SNMP SNMP Standards and RFCs SNMP Basic Concepts Network Management Architecture SNMP Protocol Architecture Proxies

    3. 3 Internet Network Management Also referred to as SNMP-based Network Management Simple Network Management Protocol (SNMP) is often referred to as the Internet Network Management Framework which includes management architecture structure of management information management protocol plus related concepts... Most widely used in computer communication networks Internet Engineering Task Force (IETF) is responsible for SNMP standardization

    4. 4 Origins of Internet ARPANET (formed by US DoD, 1969) connecting four geographically separated computers in US 23 computers in ARPANET (1971) Computers in UK and Norway were connected (1973) TCP/IP protocol suite as ARPANET’s standard protocol (late 70’s) TCP/IP as NFSNET’s standard protocol (1984) Continued growth throughout the 80’s and 90’s currently more than 40,000,000 nodes on the Internet Need for the management of rapidly growing Internet!

    5. 5 Origins of Internet NM Internet Control Message Protocol (ICMP) until late 70’s, e.g., Ping utility Simple Gateway Monitoring Protocol (SGMP) - 1987 High-level Entity Management System (HEMS) generalized version of Host Monitoring Protocol (HMP) SNMP enhanced version of SGMP an interim solution CMIP over TCP/IP (CMOT) long-term solution did not go very far

    6. 6 Evolution of SNMP SNMPv1 draft came out in 1988 and became full Internet standard in 1990 most workstations, bridges, routers, switches and hubs are now equipped with SNMP agent many resource MIBs (including systems & applications) have been defined RMON (1995) Remote Monitoring, extends the SNMPv1 MIB and functions SNMPv2 attempted to improve the deficiencies of SNMPv1 Full Internet Standard SNMPv3 internet drafts came out in Feb. 1998, adding security features now a full Internet Standard

    7. 7 IETF Standardization Process (RFC2026) http://www.ietf.org/rfc/rfc2026.txt IETF forms a working group (WG) for a specific task WG generates one or more internet drafts (ID) ID document can follow one of three tracks (1) standards track, (2) informational, (3) experimental Internet documents are published as RFCs Internet Proposed Standard Internet Draft Standard Internet Full Standard Other status: Obsolete: a document that is replaced by an updated version Historic: a document that is retired The latest status on IETF NM RFCs can be found from http://wwwsnmp.cs.utwente.nl/ietf/rfcs/rfcbystatus.html

    8. 8 SNMP Protocol RFCs

    9. 9 SNMPv1 Standards

    10. 10 SNMP Full Standards

    11. 11 SNMP NM Architecture The manager resides in Network Management Station (NMS) while the agent resides in the managed Network Node The manager requests the agent to perform Set and Get operations on the variables in the Management information Base (MIB) By means of traps the agent occasionally notifies the manager about some events related to network operation

    12. 12 SNMP Protocol Architecture

    13. 13 The Role of SNMP

    14. 14 SNMP Proxy Agent

    15. 15 Reading and Browsing Read Chapter 4 of the Textbook Visit and browse IETF Web site: www.ietf.org U. of Twente NM Web site: wwwsnmp.cs.utwente.nl/ietf/rfcs/rfcbystatus.html

    16. 16 What will be covered next... Abstract Syntax Notation 1 (ASN.1) Basic Encoding Rules (BER) Structure of Management Information MIB Definitions Standard SNMP MIBs SNMP Operations Developing MIBs etc.

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