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User’s Guide – version 3.1.3 NetFlow Tracker
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ample Size
NetFlow Tracker picks an optimal sample size for a real-time chart based upon the
amount of time covered; you can override this by selecting a number of units. For
example, you can create a report covering a day with each sample being an hour long.
Source Data
Long-term data is stored in samples of various sizes that are optimal for different
lengths of chart; you can override the automatic selection of the source data to create
charts showing, for example, a month in day-long blocks.
Start Time
Pick the date and time of the earliest data to consider. The default value is six hours
before you opened the filter editor.
End Time
Pick the date and time of the last data to consider.
Length
Instead of specifying a start and end time you can specify a length in units; the report
will cover that number of units and end at the last full unit before the time it is opened.
Reload Interval
If you have selected a unit length or a time range that extends into the future you may
want the report to refresh automatically to show new data; if so, enter the number of
seconds between automatic refreshes here.
Time Mask
You can use the time mask filter to select only certain times of day within the time
range. For example, you can choose to only consider data between 8:30 and 18:00 on
a weekday. To do this, select Monday, Friday, 8:30 and 18:00 and press “Add”:
You can add as many masks as you wish; only data within one or more masked areas
is considered. If no masks are selected then all data between the start time and end
time is considered.
Time Zone
You can change the time zone used to interpret the start and end times and time
masks from the default of the time zone used by the NetFlow Tracker server.
Source Device
You must select which router or switch you want to consider. If you need to consider
more than one device, click “Multiple…”, but be aware that if you select multiple
devices there is a chance that some or all traffic may be accounted for multiple times.
In Interface
You can report on inbound traffic for an interface or set of interfaces by adding them
to the in interface filter. The interfaces you can pick depend on the filtered source
devices.