Chapter 2 : Lab 2.1.6 Observing Traffic Using Cisco Network Assistant

Step 1: Establish the network baseline criteria

Network baselining is the measuring and rating of the performance of a network as it transports data in real time.

Step 2: Configure network connectivity

NOTE: If the PCs used in this lab are also connected to your Academy LAN or to the Internet, ensure that you record the cable connections and TCP/IP settings so these can be restored at the conclusion of the lab.

  1. Connect the devices in accordance with the given topology and configuration. Your instructor may substitute Discovery Server with an equivalent server for this lab.
  2. See your instructor regarding device configuration. If the devices are not configured, then from the Admin PC, establish a terminal session in turn to each switch and the router using HyperTerminal or TeraTerm. Configure these devices in accordance with the configuration details provided.
  3. Ping between all devices to confirm network connectivity. Troubleshoot and establish connectivity if

the pings fail.

 

Step 3: Set up Cisco Network Assistant

  1. From the Admin PC, launch the Cisco Network Assistant program.
  2. Set Cisco Network Assistant to discover the network. One method is to establish a “community” of devices. From the Application menu, click Communities.
  3. In the Communities window, click Create.
  4. In the Name field, enter FilmCompany.
  5. List the four options available in the Discover field:
  6. From the Discover drop-down list, select Devices in an IP address range.
  7. At the Start IP address, enter 10.0.0.1
  8. At the End IP address, enter 10.0.0.5
  9. Click Start. The devices found will be listed.
  10. Click OK on the Create Community and Communities dialog boxes. Note the range of icons now available on the top toolbar.
  11. Click the Topology icon on the top toolbar and view the topology that Cisco Network Assistant has created.

Step 4: Examine Cisco Network Assistant features

Cisco Network Assistant provides a range of features to display text and graphical information about the network devices. From the topology view window, right click each device’s ID and select properties. What protocol is used to discover and obtain the device information displayed?

Jawaban: Cisco Discovery Protocol

Step 5: Examine sample Cisco Network Assistant output

Once devices are added to the community, the links can be monitored from the Monitor tab of Cisco Network Assistant.

Step 6: Clean up

Erase the configurations and reload the routers and switches. Disconnect and store the cabling. For PC hosts that are normally connected to other networks (such as the school LAN or to the Internet), reconnect the appropriate cabling and restore the TCP/IP settings.

Challenge

This lab focused on monitoring individual devices in a network. Consider, research, and discuss the network factors that should be included in network baseline measurements. Responses vary but examples include:

  • • Testing and reporting of the physical connectivity
  • • Normal network utilization
  • • Peak network utilization
  • • Average throughput of the network usage
  • • Protocol usage

In-depth network analysis can identify problems with speed and accessibility and can find vulnerabilities and other problems within the network. Once a network baseline has been established, this information can be ensure the current network is optimized for peak performance. Network analysis techniques include:

  • Physical health analysis
  • Broadcast storm analysis
  • Network capacity overload analysis
  • Network throughput analysis
  • Transport and file retransmission analysis
  • Packet route and path cost analysis
  • End-to-end file transfer analysis


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