Packet Capture - ProfiTap PROFISHARK 1G User Manual

www.profitap.com Page 13
- Packet Slicing: If checked, the first 128 frames' Bytes are captured.
- No Timestamp: if selected, the frames are captured without extra timestamp.
- Unix timestamp at end of packet: if selected, a Unix formatted* timestamp is
adjoined at the end of the packet data.
- Nanosecond timestamp at end of packet: if selected, a nanosecond format-
ted** timestamp is adjoined at the end of the packet data.
- Unix timestamp at beginning of packet: if selected, an Unix formatted times-
tamp is adjoined at the beginning of the packet data.
- Nanosecond timestamp at beginning of packet: if selected, a nanosecond
formatted timestamp is adjoined at the beginning of the packet data.
*Unix timestamp format: the 64 bits timestamp is organized in two 32 bits
words, representing the seconds since 01/01/1970, and the fraction of se-
cond.
**Nanosecond timestamp format: the 64bits timestamp represent the nanose-
conds since 01/01/1970.
Note: if the "Packet Slicing" feature is enabled, the hardware automatically
disable the "Keep CRC32" feature. No padding is added to frames smaller
than 128 Bytes.
Note: if both options "Transmit CRC Errors" and "Keep CRC32" are enabled,
all the erroneous packets will be treated as fair ones.

Packet capture

PROFISHARK gives you the ability to capture:
- Any type of frames (pause frames, Vlan tagged, ...),
- Any encapsulated frames,
- CRC errors frames,
- Short frames (< 64 bytes),
- Jumbo frames (> 1518 bytes),
- Any frames between 10 bytes and 10 Kbytes,
Once the drivers have been properly installed, a new connection is added in
the Network Connection panel. PROFISHARK acts as 2 Gbit/s unidirectional
NIC, regardless of the network connection speed. The frames aggregation is
done in hardware respecting the original frame order. As opposed to FIFO
(First In, First Out), the PROFISHARK employs an FCFS (First Come, First
Served) mechanism.
A reboot of the computer may be required to refresh the Winpcap/Wireshark
device list. PROFISHARK has been tested with all major capture/analyzer
software.