Verifying that the Network Insights Appliance is Receiving Raw Packet Data

SUMMARY Follow these steps to verify that Network Insights appliance is receiving raw packet data from the network tap or span port.

1. From the Console, use SSH to log in to JSA Network Insights as the root user.
2. If your appliance uses a traditional network card, use tcpdump to verify that the traffic is reaching the network interface:

   For example, type tcpdump -ni ens3f0 -c 5 to capture on ens3f0 and stop after 5 packets.

   The results might look similar to this example:

   Figure 1: Results of tcpdump capture command
3. If your appliance uses a Napatech network interface card, type the following command to verify that the traffic is reaching the network interface:
   The results might look like similar to the following example:

   Figure 2: Napatech Monitor with SFP Type, Link Status, and Transmission (Tx) Values.
   If there is no traffic that is displayed, check the Link column to see if the status is Down.
4. Make sure that you are using the correct SFP part number.
   1. To identify which SFP part numbers are in use, type the following commands to :
   The output might look similar to the following example: