2. 1/28/2010 Network Plus Unit 5 Section 2 Network Management

3. 7 Documenting Network Information Documentation Baseline –Report of network’s current operation state Baseline measurements –Network backbone utilization rate –Number of users logged on per day or per hour –Number of protocols running on network –Error statistics Runts, collisions, jabbers, giants –Frequency of application use –Bandwidth usage

4. 8 Baseline Measurements (cont’d.) Figure 15-3 Baseline of daily network traffic

5. Network Management Software Page 743 Enterprise-wide network management software –IBM Tivoli NetView, Cisco CiscoWorks –Accomplish fault, performance management –All use similar architecture –Polling Collecting data from multiple networked devices at regular intervals –Agent Software routine collecting information about device’s operation Provides information to network management application 10

6. Network+ Guide to Networks, 5 th Edition11 Network Management Software (cont’d.) Managed device –Manages several objects Processor, memory, hard disk, NIC, intangibles MIB (Management Information Base) –Contains managed devices definition, data SNMP (Simple Network Management Protocol) –Agents used to communicate managed device information –Part of TCP/IP suite: runs over UDP port 161 Several ways to view and analyze data

7. Network+ Guide to Networks, 5 th Edition12 Network Management Software (cont’d.) Figure 15-4 Network management architecture

8. 15 System and Event Logs Log –Contains recorded conditions recognized by operating system –SNMP Logs –History/Configuration by device Event Viewer application –GUI to view Windows-based log information Event log –Windows-based computer log containing monitored device information System log

9. Windows Event Viewer System Log

10. Network+ Guide to Networks, 5 th Edition17 Traffic Shaping Traffic shaping –Manipulating packet, data stream, connection characteristics Manage type, amount of traffic traversing network –Involves Delaying less important traffic increasing priority of more important traffic –May be used for QoS on VoIP networks –Goals Assure timely delivery of most important traffic Offer best possible performance for all users

11. Network+ Guide to Networks, 5 th Edition18 Traffic Shaping (cont’d.) Techniques –Delay less important traffic –Increasing priority of more important traffic –Traffic policing Limit traffic volume flowing in, out of interface during specified time period Limit momentary throughput rate for an interface Not without controversy –Comcast discriminated against certain traffic types

12. Traffic Shaping (cont’d.) Traffic prioritization –Used in VoIP (See page 555-556) DiffServ (Differentiated Services) flag or TOS (type of service) field in IP datagram VLAN tag in Data Link layer frame (MPLS) Service or application 20

13. Network+ Guide to Networks, 5 th Edition30 Software Changes Table 15-1 Reversing a software upgrade

14. Network+ Guide to Networks, 5 th Edition The End