Finisar Surveyor User Manual
Page 178
8-10
Surveyor
User’s Guide
DA and SA Fields
The
DA
and
SA
fields define the MAC layer destination address and MAC layer
source address for the stream. Note that the MAC address values appear in the
stream synopsis in the
Defined Streams
list box.
Use an X in any offset of the
DA
or
SA
fields to indicate “wild card” addresses.
Surveyor will generate packets with different values in that offset. For example, set
the
DA
field to 432FFFFFXX. When transmitting packets, values will be generated
either sequentially or randomly and sent for the last 2 positions of the DA.
The values for the wild cards can be random or sequential, as defined by the
Random Access Mode
buttons below the
DA
and
SA
fields.
Click on the
Names
button to see the currently active name table. You can set the
DA or SA from the name table and they will appear in the
DA
or
SA
fields in the
Transmit Specification
window. The name appears to the right of the DA or SA
address if the name table contains a symbolic name for the address.
Packet Type
Sets the packet type for the current stream. Use the pull-down box to see available
options. In the example stream, the packet is an IP packet. This field can also be
used to enter the packet length for IEEE802.2 or SNAP frames.
Packet Size
Sets the packet size. Use the pull-down box to view common sizes. The size must be
from 8 to 15,000 bytes.
Data Field
Specifies the data to be sent as part of the packet. Use the pull-down box to see
commonly used values. Any hexadecimal value can be entered in the
Data
field and
sent with the packet. Up to the first 32 bytes of data can be specified in this field.
The entire data within the packet can be edited using the Packet Editor.
Sequence Numbers
Sets a starting number and ending number for packets transmitted, and also sets the
offset within the frame where the sequence number will be stored. You cannot store
the sequence number in the first 12 offsets of the frame. Also, you should take care
not to store the sequence number in any part of the packet that contains other
information that will used by the network or by the receiving station.
Auto CRC Check Box
Setting the check box also affects the contents of the stream. If checked, a correct
CRC value is automatically generated for the packet. If unchecked, bad CRC