Generating frames

The traffic generator transmits frames on the network
to simulate an artificial background level of
activity. This can be used to evaluate the performance
of stations while the network is busy.  As well, you
may bombard a station with traffic and see that it
discards or otherwise handles heavy loads.

The data will be transmitted continuously, with
interframe times according to the value you choose,
until you press ESC.

Selecting the destination address:

In the "To" address field you select a destination
station address for the frames to be transmitted. 
Pressing ENTER allows you to select from a list of
destination addresses.  Using "<all stations>" will
broadcast to all stations on the ring.  Otherwise you
may move the cursor to select a particular station
from the current list of names and addresses, or use
the "<New station>" entry to supply a new address in
hex. The destination address may be either a specific
station, or a broadcast or functional address.

The size of the transmitted frames:

By pressing ENTER in the "Size=" field, you may
specify a value for the length of the generated
frames.  It may be between 18 and 4048 bytes and
includes the AC, FC, station address and data fields. 
Eighteen bytes is just long enough for a frame with
the minimum 3 bytes of IEEE 802.2 header.

The data portion of the frame will contain the four
bytes you specify (see below), followed by a 2 byte
incrementing sequence number, padded out with zero to
the end of frame.

Setting the interframe delay time:

By pressing ENTER on the "Delay=" entry, you can
specify a value for the time from the end of one frame
to the beginning of the next.  Values from zero to
1000 milliseconds (one second) are acceptable.

This value is only approximate, due to the internal
queueing mechanism of the Sniffer.

Choosing the first four data bytes:

You can specify the first four bytes of data in the
generated frames by selecting the "Data=" entry, and
providing 8 hexadecimal digits.  The first byte will
be the DSAP field and the second will be the SSAP
field.  The third and optional fourth are the IEEE
802.2 control field.

(Note: Put the value 03 in the third byte to mean an
 LLC "UI" frame, e.g. a datagram.)
