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Filter statistics - counting specification
Recording statistics events
The statistics events are worked out from the counting of protocol events
depending on:
- the protocols used on the SL, DL links of the interfaces.
- the Time sampling period.
- the types of counting details to be recorded or not for each protocol
layer to allow the Counter display actions on the generated
statistics event file:
- Decoding: by protocol unit type - frames, messages, packets,
....
- Decoding/Multiplex: counting by protocol unit type AND/OR
particular field-value.
- Measure: counting of data flow, of frames with a certain
length.
- Measure/Multiplex: counting of data flow AND/OR particular
field-value.
- Delays: counting of the number of Delay protocol system events
of different types within a time range.
Counter display action
A selection of interface(s) (not related to Filter set) is attached to
each of the 20 available Counters display actions which are related to:
- counting of protocol event types.
- Delays counting: counting of the number of Delay protocol system
events (Start Delay, Stop Delay or Kill Delay events) within a time range
(only for Stop Delay events). For example, that makes possible to glance
over dispersion of the delay values.
Counting of protocol events
The specifications for counting BOP or Ethernet/802.3 protocol events are
based on a group of selection conditions specific to the types of event
depending on the protocol used on the SL, DL links.
Each Counter display action (20 available) can be defined by selection
conditions of Measure, Decoding or Value type according to the
selection of interface(s), the layer and the direction:
- Measure: on a particular layer and a specific protocol, counting
can be done on the data flow or the number of frames depending on their
length.
- Decoding: each protocol condition can be defined by any type of
event of the SL, DL links according to the protocol stack specification by
layers.
- Value: selection conditions in a layer can be defined by a
field-value in the control field or a data-value identified in the data
field.
Use of protocol conditions to manage the actions is based on the following
principles:
- The group of protocol conditions which refer to different protocol
layers, constitute an OR function.
- The protocol conditions defined within a selection mode constitute
an OR function.
- Basically there is an OR function between the different
selection modes, but an AND function can be defined according
to the two following cases:
- between used Decoding and Value selection modes.
- between used Measure and Value selection modes.
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