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13
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6.2.2 Spy Mode with Wrapper
In this case, a header is added on the Ethernet sent frame. The packet received in the
BroadR-Reach port will be logged through the corresponding Gigabit Port into an Ethernet
RAW frame. The following picture shows the structure of an Ethernet BRSPY mini RAW
frame, in this use case:
Note:
The data Frames are enhanced with additional information as an exact timestamp and
the bus port the data was originally sent on. Timestamps are in 0.04
μs resolution and syn-
chronous to all connected lines.
With this feature the user can record the exact time when the first bytes of a frame were re-
ceived on a BroadR-Reach port of the BR SPY mini. It is also possible to see the complete
frame including the preamble and the CRC in Wireshark. Normally this information is re-
moved by your network interface.
Note:
The following table shows the values of
Port
field:
Port
Value
BR 1A
0x00
BR 1B
0x01
BR 2A
0x02
BR 2B
0x03
Destination
MAC
(6 bytes)
Source
MAC
(6
bytes)
Ethernet
Type
(2 bytes)
Time
Stamp
(6
bytes)
Port
(1
byte)
Extra
(1
byte)
Length
(2
bytes)
Payload
(BR
packet)
CRC
(4
bytes)
Field Name
No. Of
Bytes
Value
Destination MAC Address
6
FF:FF:FF:FF:FF:FF
Source MAC Address
6
00:50:C2:E4:30:00
Ethernet Type
2
0x2182
Time Stamp
6
See the note below
Port
1
See the table below
Extra
1
0x00
Length
2
Length of the Ethernet BRSPY mini frame
Payload
X
BroadR-Reach packet
CRC
4
Ethernet BRSPY
mini Frame Header
Summary of Contents for BR SPY mini
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