Finisar Surveyor manual DA and SA Fields, Packet Type, Packet Size, Data Field, Sequence Numbers

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

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