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Network Plus Unit 5 Section 2 Network Management

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

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Network Plus Unit 5 Section 2 Network Management

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  1. Network PlusUnit 5 Section 2Network Management 1/28/2010 1/28/2010

  2. 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 7

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

  4. 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

  5. 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 Network+ Guide to Networks, 5th Edition 11

  6. Network Management Software (cont’d.) Figure 15-4 Network management architecture Network+ Guide to Networks, 5th Edition 12

  7. 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 15

  8. Windows Event ViewerSystem Log

  9. 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 Network+ Guide to Networks, 5th Edition 17

  10. 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 Network+ Guide to Networks, 5th Edition 18

  11. 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

  12. Software Changes Table 15-1 Reversing a software upgrade Network+ Guide to Networks, 5th Edition 30

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

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