ENTWURF, ERRICHTUNG, BETRIEB VON DATENNETZEN

Transkript

1 ENTWURF, ERRICHTUNG, BETRIEB VON DATENNETZEN Dr. Manfred Siegl citem.at N E T Z M A N A G E M E N T Was erwartest Du vom Netz? Das es immer gut funktioniert. In Wirklichkeit sind wir alle abhängig von Euch. Wenn das Netz nicht funktioniert, funktioniert gar nichts. 1

2 N E T W O R K M A N A G E M E N T Error Events Resources Manager Policy Available Management Resources FUNCTIONAL AREAS OF NETWORK MANAGEMENT FAULT ACCOUNTING CONFIGURATION PERFORMANCE SECURITY RELIABILITY AVAILABILITY CABLING FUNKTIONALITY SAVE OF INVESTMENT International Standard Organisation ISO, Information processing System - Open Systems Interconnection - Basic Reference Model - Part 4: Management Framework, IS , ISO/IEC,

3 POLICY HIERARCHIE Corporate Goal Strategy Policy Enterprise oriented Informal Description Management Decision Transformation Management Scripts Managed Objects Network Resources Technology oriented Formal Description ZIELE UND ANFORDERUNGEN Kostenminimierung Bandbreite Ausreichende Performance Verzögerung Ausreichende Verfügbarkeit Verfügbarkeit Ausreichende Sicherheit Zuverlässigkeit 3

4 KLASSIFIZIERUNG DER ZEITLICHEN ANFORDERUNGEN Isochron konstante Verzögerung keine Verzögerungsvarianz Synchron beschränkte Verzögerung Verzögerungsvarianz erlaubt Asynchron keine Beschränkung der Verzögerung und der Verzögerungsvarianz NETWORK MANAGEMENT ACTIVITY LOOP Error Event Resources Recognition Characteristic Values Perform Control Operation Representation of Operation Status Available Management Resources Interpretation and Evaluation Decision Policy 4

5 ENTITIES OF SNMP Management Information (MIB) Managed Node (Agent) Management Station (NMS) Management Protokoll (SNMP) SNMP BASIC DESIGN (1) NMS Agent Agent Agent 5

6 SNMP BASIC DESIGN (2) NMS NMS Agent Agent Agent SNMP BASIC DESIGN (3) NMS NMS Agent Agent Agent 6

7 PROXY AGENT Proxy Agent Agent DUAL ROLE ENTITY Agent Agent 7

8 INBAND MANAGEMENT User Network Agent Agent Agent OUTBAND MANAGEMENT User Network Agent Agent Agent 8

9 PROTOCOL STACK FTP TELNET TFTP SNMP TCP UDP IP ETHERNET SNMP STRUCTURE Presentation/Visualisation Managed Object Protocol Stack / Interface MANAGER AGENT Protocol Stack / Interface Managed Object Instrumentation Resource 9

10 Manager TYPES OF INSTRUMATIONS Agent Resource OBJECT IDENTIFIER - OID ROOT CCITT (0) ISO (1) JOINT-ISO-CITT (2) ORG (3) DOD (6) INTERNET (1) MNG (2) EXPERIMENTAL (3) PRIVATE (4) MIB-II (1) SYSTEM (1) INTERFACE (2) AT (3) IFNUMBER(1) IFTABLE (2) ENTERPRISES(1) CITEM (1093) SYSTEMS (1) SUBMGR (2). ISO. ORG. DOD. INTERNET. MNG. MIB-II. INTERFACE. IFNUMBER

11 TABLES CITEM SYSTEMS SUBMGR FANO THRSRV SUBMGRTABLE SUBMGRENTRY MGMTHOST MGMTPROC MGMTINDEX MGMTVAUES PROTOCOL DATA UNITS Manager get request get response get next request get response set request get response trap Agent event 11

12 ACCESS RIGHTS READ-WRITE READ-ONLY READ-CREATE WRITE-ONLY WRITE-CREATE NOT-ACCESSIBLE 12