24: Network Management
“When we ignore experimentation and avoid contact with the reality, we hamper progress.”—Walter Tichy."All truths are easy to understand once they are discovered; the point is to discover them." - Galileo Galilei"When you can measure what you are speaking about and express it in numbers, you know something about it." - Lord Kelvin.Lecture outline: how to use network management (SNMP-based) tools for performance evaluation?
1. SNMP framework
Management framework: manager and agents
Management Information Base (MIB)
MIB-II (RFC 1213); Host Resources MIB; RMON MIB; Enterprise MIBs
Structure of Management Information (SMI): language for defining MIBs
Object attributes: Name, Encoding, Type of Object
Simple Network Management Protocol (SNMP)
SNMP PDU; Getting/ setting SNMP info
2. Some SNMP-based tools
Multi-router Traffic Grapher (MRTG)
RRDTool
SNMP based Internet weather
NMS software: Nagios, OpenNMS, Cacti
Primary reference for this lecture:
“Network Performance Toolkit: Using Open Source Testing Tools”, by Richard Blum