Real-time Traffic Graphs
IT360 generates traffic graphs as soon as Netflow data is
received. The Traffic tab shows real-time traffic
graphs for incoming and outgoing traffic. Depending on which link was
clicked, you can see traffic graphs for an interface or IP group.
Tabs above the traffic graph, let you view the graph in terms
of volume of traffic, speed, link utilization, and number of packets
received.
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The Packets tab shows the number of
actual packets of traffic data received. This information is included
in exported Netflow data. |
Click on Show Data Points drop down menu [below the graph] to
display the legend, along with total,
maximum, minimum, and average traffic values for this interface or IP
group, for the selected time period.
The Traffic IN Details and the Traffic
OUT Details show sampled values of traffic generated over the
selected time period.
Time Filters
The default graph is for the "Last Hour". You can choose to see
hour-based data in the traffic graphs for daily and weekly reports. To
do this, first select the Yesterday 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.
95-th Percentile
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.
Selectable Graph
IT360 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.
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