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Network Testing with the FrameScope Pro 2
Performance Tests
Agilent FrameScope Pro User’s Manual 57
4
Press Stop to cancel the test or to review the transmission
information on the MAC Loopback or IP Loopback screen.
Performing RFC 2544 Tests
RFC 2544 tests comprise of round-trip latency test,
point-to-point throughput test, frame loss rate tests and back to
back tests.
RFC 2544 Throughput Test
This test is designed to determine the maximum throughput
rate in frames per second, bits per second or percentages for
different frame length between two network points with no
frame loss.
The test sends frames at a constant rate in unidirectional or
bi-directional, for a specified number of seconds. If the
transmitted frame count does not match the number of frames
received by the other side, the transmit level is reduced. A
search is conducted to determine the maximum frame rate that
can be forwarded by the network with no loss. The search is
capped by the maximum data rate if it is specified by user,
otherwise will be based on the media maximum rate. During
Bi-directional symmetrical test or loopback mode if the frame is
dropped, regardless of the direction the test will be re-run at a
lower rate and the final result will be single throughput
value.On the otherhand, bi- directional asymmetrical test will
measure the throughput rate for each direction. The test
procedure is repeated for a number of legal frame length to
produce a table of maximum throughput versus frame length.
For better results, adjust the duration to load the device under
test sufficiently.
RFC 2544 Round-trip Latency Test
This test measures the latency experienced by a frame passing
and looping back through the network. A specially tagged frame
is sent and the time that this frame exits and loopbacks to the
FrameScope is recorded. Round trip latency is the difference
NOTE
For RFC 2544 tests, if the slave FrameScope unit is in use, for example,
running a frame loss rate or back to back test, an auto-search from the
master FrameScope unit will result in Search Failed. A specific search
(keying in the IP address) on a FrameScope unit under test will result in
Remote Busy.