1. Cisco – Semester 4 – Chapter 7
Network Management

2. Network is Single Unit
Changes made to routers in any location will directly affect the efficiency and reliability of entire system
Boundaries of network need to be understood
Duties and responsibilities should be delegated

3. Cost Factors Labor Network growth Technical and user training Repairs
Software Deployment
Spare parts (routers, switches)

4. Management Areas
Documenting
Monitoring
Troubleshooting

5. Documentation
Document all errors
Note problem, solution

6. Network Monitoring Why? LAN/WAN Differences Monitor the Connections
Predicting change in growth
Detecting unexpected changes in network status
LAN/WAN Differences
Placement of equipment
Monitor the Connections
Use Ping only as a last resort

7. Traffic Monitoring Looks at actual traffic
MS Windows NT Network Monitor
Fluke’s Network Analyzer
Detect failing equipment
Determine if component is overloaded or poorly configured
Use Agents
SNMP

8. SNMP Management Station Management Agent MIB
Programs to manipulate data from and control the network
Management Agent
Polling and trapping
MIB
Contains objects which are resource data gathered – Port Interface, TCO, and ICMP
Network Management Protocol
Communicates data between console and agent
RMON – looks at network as a whole – uses probes

9. RMON Groups
History – samples of statistics over specified time interval
Alarm – sounded when counters exceed threshholds
Host group – counters for each host
Host TOPN, Matrix, Filter, Packet Capture, Event, and Token Ring
Note– extension of SNMP protocol

10. Troubleshooting Step 1 – define the problem
Step 2 – determine method to use
Elimination Technique
Divide and Conquer

11. Software Tools Ping Tracert shows path packet takes Telnet
-t ping until interrupted
-a or –n resolves hostname and ping address
-l specifies length
Tracert shows path packet takes
-h gives maximum number of hops searches
-w specifies timeout to wait
Telnet
Netstat see chapter 8 notes
Arp see chapter 8 notes
IPconfig