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Packet details
Once the TAP plugin is activated and Wireshark has captured the Ethernet packets
via TAP CURIOUS, you can see additional information in the lowermost line in the
"KUNBUS-TAP" section:
Number of bytes Content
4 bytes
FCS (original checksum).
Identifier C8 3E A7 00 01 61.
Port on which the frame was received.
Port
Value in hex.
Con A
0x80
Con B
0x40
Con C
0x20
Con D
0x10
1 Byte
Error messages
Bit
Error message
Bit 7
Receive error
Signal not decoded.
Bit 6
Wrong preamble
Preamble does not conform to standard IEEE
802.3.
Bit 5
Wrong IFG
Minimum waiting time of 96 bit times not reached.
Bit 4
Alignment error
The total number of bits in a frame is not divisible
by 8.
Bit 3
CRC error
The received frame is faulty.
Bit 2
Lost frame
Frame has gone astray.
Bit 1
Long frame
The maximum length of 1518 bytes/frames has
been exceeded.
Bit 0
Short frame
Minimum length of 64 bytes/frame not reached.
8 bytes
Timestamp in ns.
Packet raw data
This section shows the packet data in hexadecimal form and as ASCII text. The
last 20 bytes in the packets contain the additional information that TAP CURIOUS
has added to the data packets.
Monitoring the interface
