HP auroraTempo User Manual page 142

aurora Tempo - User Guide
2
Note
When the CIR reading is flashing, as it is in the example
screen above, it means that the actual available CIR has
not yet been reached.
CIR
Max Bc
Max Be
Max
Throughput one-second period.
How the CIR is measured
The CIR reading shows the maximum CIR that has been
measured over the duration of the test. To determine the
actual CIR that the DLCI is capable of providing, you
need to know how many DE 'set' frames have been
received.
The DE bit in a frame may be either 'set' or 'clear'. If the
transmit data rate is less than the CIR the network does not
change the status of the DE bit. DE may be set by the
network on frames that exceed the CIR: the network may
discard these frames. When aurora
'set' frames it means that the amount of data being
transmitted exceeds the CIR.
5-62
The maximum measured CIR, in bits per
second. In Simulate mode aurora
one CIR measurement (Rx). In Monitor
mode there are two measurements: one for
each of the monitor inputs (Rx and Mon
Rx) on which aurora is receiving data.
Tempo
A flashing CIR reading means that no
frames with DE 'set' have been received.
The actual CIR that is provided may
therefore be higher (but not lower) than the
displayed figure.
The maximum number of frames with the
DE bit 'clear' (i.e. not 'set') that have been
received in the Time Constant period.
The maximum number of frames with the
DE bit 'set' that have been received in the
Time Constant period.
The maximum number of bits received in a
Tempo begins receiving DE
Tempo shows
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