Network Integration Guide › Troubleshooting › Some Files and Emails are Not Captured › Does the Network Traffic Contain Large Frames?

Does the Network Traffic Contain Large Frames?

Typically, large frames are Ethernet frames with over 1518 bytes of payload. These packets are sometimes seen on corporate networks. The NBA is designed to process packets up to 9030 bytes long, but it has only been verified to process packets up to 1522 bytes. Packets larger than 9030 bytes will not be analyzed by the NBA.

To check whether the NBA is seeing very large packets (Linux Server platforms with Napatech card only)

1. Start a command shell either at the server’s keyboard or over SSH.
2. Enter the following commands:

   cd /opt/napatech3/bin’.
   ./monitoring’.
   Type ‘1’ to show the ‘ExtRMON’ screen.
   

3. Verify that the 8192-Max octets counter shows zero:

   1519-2047 octets: 0x0000000000000000  2048-4095 octets: 0x0000000000000000
   4096-8191 octets: 0x0000000000000000  8192-Max octets : 0x0000000000000000