Tabs above the traffic graph, let you view the graph in terms
of volume of traffic, speed, link utilization, and number of packets
received.
![]() |
The Packets tab shows the number of actual packets of traffic data received. This information is included in exported Netflow data. |
The Traffic IN Details and the Traffic
OUT Details show sampled values of traffic generated over the
selected time period.
The default
graph is for the "Last Day". You can choose to see
hour-based data in the traffic graphs for daily and weekly reports. To
do this, first select the Last Day Report or Last
Week Report option in the top time selection bar. When the
respective traffic graph is displayed, the table below the graph
includes the icon next to the Category
label.
Click the icon to specify the hourly time
interval for which you want to see traffic graphs. Click the Show
button to set the filter and see hour-based values in the traffic graph
as well as the table below. Click the Reset button to
turn the filter off and switch to the regular traffic graphs.
The 95th
percentile is the number that is greater than 95% of
the numbers in a given set. The reason this statistic is so useful in
measuring data throughput is that it gives a very accurate picture of
the maximum traffic generated on an interface. This is a standard
measure that is used for interpreting the performance data.
The 95th Percentile is the highest value left when the top 5% of a
numerically sorted set of collected data is discarded. It is used as a
measure of the peak value used when one discounts a fair amount for
transitory spikes. This makes it markedly different from the average.
The following example would help you understand it better.
Consider if the data collected for CPU Utilization is
60,45,43,21,56,89,76,32,22,10,12,14,23,35,45,43,23,23,43,23 (20
points). This list is sorted in descending order and a single top
value, 89, is discarded. Since 1 consitutes 5% of 20, we discarded 1
value in this case. The highest value in the remaining list, 76, is the
95th percentile.
NetFlow Analyzer brings you the added advantage of drill-down
to the traffic graphs presented. As you hover the mouse over the
plot-area you can see a "+ " - cross-hair icon. Click on an area of the
graph and holding the mouse down, drag it to the point(time period),
you wish to further drill down to. For example : Having chosen a Last
week report you could choose to study two specific days by selecting
them. You could further drill down on until the time period you have
chosen is more than 1 minute. The button take you to a time period depending on the time
difference between the From time and the system time.
Illustration
If you choose Last Hour Report at 18:15 hours, then a graph with a plot
of data from 17:15 to 18:15 is shown. If you choose the time period 17:
25 to 17:50 then a corresponding graph with 1 Minute Average is shown.
When you click on the
button the screen changes to the Last Hour report. ( as the time
difference between the From Time 17:25 and system time 18:20 is less
than 1 hour)
Thus depending on the time difference you are either taken to
the Last Hour or Last Day or Last Week or Last Month or Last Quarter
graph.