ProfiTap ProfiShark 10G User Manual page 13

The following features can be turned on and off:
Enable timestamps in live capture:
If checked, a Unix formatted timestamp is adjoined at the
end of the packet data, after the FCS. This timestamp can be
interpreted by the Profitap Wireshark dissector in live capture
mode.
Unix timestamp format: the 64-bit timestamp is organized in
two 32-bit words, representing the seconds since 01/01/1970,
and the fraction of second.
Transmit CRC Errors:
If checked, the ProfiShark will not filter out network packets
with CRC errors like a normal NIC would.
Keep CRC32:
Keep the CRC32 information (32-bit Frame Check Sequence)
located at the end of the packets. FCS can be interpreted in
Wireshark (Edit -> Preferences -> Protocols -> Ethernet ->
Assume packets have FCS).
Disable Port A:
If checked, the frames which input on port A are not captured.
Disable Port B:
If checked, the frames which input on port B are not captured.
Packet Slicing:
If checked, the first 128 bytes of each frame are captured.
NOTE
If the "Packet Slicing" feature is enabled, the hardware
automatically disables the "Keep CRC32" feature. No padding
is added to frames smaller than 128 bytes.
NOTE
If both "Transmit CRC Errors" and "Keep CRC32" are
enabled, all erroneous packets will be treated as correct ones.
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