Filtering Frames of a Specific Length

Capture frames greater than or equal to 1,000 bytes.

1. Create a file with the following NTPL commands. It sets up a filter to capture all frames greater than or equal to 1,000 bytes.

   Delete = All
   Assign[StreamId=0] = Length >= 1000

   Apply the NTPL commands.

   /opt/napatech3/bin/ntpl -f <file_name>

   An output example:

   NTPL CMD: Delete = All
   NTPL ID:    0
   NTPL CMD: Assign[StreamId=0] = Length >= 1024
   NTPL ID:    5

2. Start the monitoring tool.

   /opt/napatech3/bin/monitoring

   Press r to reset the statistics.
3. Start throughput.

   /opt/napatech3/bin/throughput -s 0

4. Start transmitting 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:  3262 packets @      3262 pps,  0 packets dropped,   Wire:    33.112
   Throughput:  3262 packets @         0 pps,  0 packets dropped,   Wire:     0.000
   ...Done:  Received: 3262 packets   Wire: 4138957 bytes   Pci: 4191149 bytes   Dropped: 0 packets  0 bytes
   
   Max throughput:       3262 pps  Wire:    33.111 Mbps  Pci:    33.529 Mbps
   Min throughput:          0 pps  Wire:     0.000 Mbps  Pci:     0.000 Mbps
   Avg throughput:        543 pps  Wire:     5.518 Mbps  Pci:     5.588 Mbps
   
   Total throughput:  Received: 3262 packets   Wire: 4138957 bytes   Pci: 4191149 bytes   Dropped: 0 packets  0 bytes

6. Check the statistics in the monitoring tool.
   An output example:

   *───────────────────── monitoring (v. 3.25.5.11-9bcd529a) ─────────────────────┐
   │  P  A        Type       Link    Down          Rx          Tx  Max  Temp.     │
   │  0  0 SFP28-SR-DR   25G Full       0       0.00M       0.00M  9018 36.10 C   │
   │  1  0 SFP28-SR-DR   25G Full       0       0.00M       0.00M  9018 35.90 C   │
   └──────────────────────────────────────────────────────────────────────────────┘
    Port  0 - Adapter 0 Intf 0: NT50B01_2x25
   ┌──────────────────────────────────────────────────────────────────────────────┐
   │                                RX RMON1 counters                      Totals │
   │ Packets         : #000000000000010000  Octets          : #000000000007796108 │
   │ Broadcast       : #000000000000000000  Multicast       : #000000000000004934 │
   │ 64 octets       : #000000000000000011  65-127 octets   : #000000000000000463 │
   │ 128-255 octets  : #000000000000000882  256-511 octets  : #000000000000001777 │
   │ 512-1023 octets : #000000000000003605  1024-1518 octets: #000000000000003262 │
   │ Undersize       : #000000000000000000  Oversize        : #000000000000000000 │
   │ Fragments       : #000000000000000000  Collisions      : #000000000000000000 │
   │ Drop events     : #000000000000000000  Crc/Align errors: #000000000000000000 │
   │ Jabbers         : #000000000000000000  Ext drops       : #000000000000000000 │
   └──────────────────────────────────────────────────────────────────────────────┘
    Reset Tx/Rx 0RMON 1ExtRMON 2Checksum 3Decode 4Drop 5IPF Dec/Hex Tot/Spd
    Quit  Sensors Color stat XTimeSync IEEE 1588 PTP EStream LFlowstat FDump