Capture UDP Frames

This describes how to set up a filter that captures UDP frames.

About this task

It is possible to set up a filter, filtering frames based on the protocol information. This example shows how to set up a filter to capture UDP frames. This figure shows the test setup.

Port 0 of the SmartNIC is connected to the traffic generator.

1. Create a file with the following NTPL commands.

   Delete = All
   Assign[StreamId=0] = Layer4Protocol == UDP

   Apply the configuration. For example:

   /opt/napatech3/bin/ntpl -f config.ntpl

   An output example:

   NTPL CMD: Delete = All
   NTPL ID:    0NTPL CMD: Delete = All
   NTPL ID:    0
   NTPL CMD: Assign[StreamId=0] = Layer4Protocol == UDP
   NTPL ID:    3

2. Start the monitoring tool.

   /opt/napatech3/bin/monitoring

3. Start throughput.

   /opt/napatech3/bin/throughput -s 0

4. Transmit 10,000 UDP frames on the traffic generator.
5. Stop throughput and check the output.
   An output example:

   Throughput:  0 packets @         0 pps,  0 packets dropped,   Wire:     0.000 Mb
   ...
   Throughput:  10000 packets @     10000 pps,  0 packets dropped,   Wire:    63.39
   Throughput:  10000 packets @         0 pps,  0 packets dropped,   Wire:     0.00
   ...
   Done:  Received: 10000 packets   Wire: 7924585 bytes   Pci: 8084585 bytes   Dropped: 0 packets  0 bytes
   
   Max throughput:      10000 pps  Wire:    63.396 Mbps  Pci:    64.676 Mbps
   Min throughput:          0 pps  Wire:     0.000 Mbps  Pci:     0.000 Mbps
   Avg throughput:       1000 pps  Wire:     6.339 Mbps  Pci:     6.467 Mbps
   
   Total throughput:  Received: 10000 packets   Wire: 7924585 bytes   Pci: 8084585 bytes   Dropped: 0 packets  0 bytes
   

6. Check the statistics in the monitoring tool.