Why Am I Not Seeing Any Data?

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Check Your Ethernet Cables

  1. Do you have the required category of network cables- cat. 6 or cat. 5e?
  2. Are the network cables plugged into the correct ports?
    • Firstly, there should be a category 5e or higher ethernet cable connected from the Netscope’s port marked with a blue dot, the ‘Monitor’ port, to your switch (the monitor port is assigned an IP address and should be connected to a part of the switch accessible to you from your desktop). This port is used to connect you to NetScope through your browser.
    • If Netscope is set-up in-line there should be one Category 5e or higher ethernet cable connected from your gateway to one of  Netscope’s bridge ports, marked with a green dot or yellow dot (if you are running a 100 Mb network then this cable may need to be a crossover cable). Next, there should be one category 5e or higher ethernet cable connected from the other of NetScope’s bridge ports to your switch (if you are running a 100 Mb network then this cable should be a straight through cable).

For QOS mode OR Netscope is in-line (Network Topology: Bridge with … OR Packet Bridge)

  1. Is Netscope in bypass mode? see Bypass Settings.
    1. Cannot exit bypass mode?
      • It may be that you have recently uploaded a license file with a limited Bandwidth and have not yet activated a policy that has its Link Maximum’s set to or below it.

For Mirror mode (Network Topology: Capture Only OR Packet Capture)

Still not seeing data? Restart the NetScope service

If you have followed the previous steps and still not seeing any data restart the NetScope service. Instructions are:

  • Go to ‘Configuration’ tab, click ‘System’ and then click ‘Next’.
  • Select ‘Restart NetScope Services’ as the System Command.
  • Click ‘Save’.

This will restart the NetScope services and reinitialise all auxiliary processes. Now check ‘Interactive Reports‘ to see if you can see data– choose ‘Live’ view in the Activity graph.

A traffic class may be selected in which there is no traffic

Still not seeing data? Reboot the NetScope computer

If all else fails it is time to reboot the computer that NetScope runs on (not usually necessary).

Please note:

‘In-line’ Network Traffic Interruption Times

To reboot the system:

  • Go to ‘Configuration’ tab, click ‘System’ and then click ‘Next’.
  • Select ‘Reboot System’ as the System Command.
  • Click ‘Save’.

NetScope will then reboot the operating system and may take some time especially on server grade hardware that needs to run through its hardware checking processes on boot.

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