User’s Guide – version 3.1.3 NetFlow Tracker 23 Per-AS data
If your router uses BGP to route traffic it will provide s ource and destination origin or
peer AS numbers in its NetFlow data. NetFlow Tracker cre ates optimised bi-directional
charts for each AS just as it does for each interface. An A S chart is only available for a
single device as otherwise there is a high chance that some or all traffic will be
accounted for multiple times by multiple routers. You ca n use the Filter Editor to create
areport or chart based upon an AS and data from multiple ro uters.
To view the ASs routed by a given router, click the ASs l ink in the navigation menu at
the top of the interface report:
The AS list is similar to the interfaces list, but does not show percentage utilization.
Working with Charts
Charts are one of the most useful ways of working with data in NetFlow Tracker. A
chart lets you quickly pick out an area of interest to exami ne in further detail.
Achart displays the elements that contributed most to the ov erall total traffic or
packet rate over the charted time range. By default, at m ost ten elements are charted
but this can be configured in the Report Settings page.
Viewing earlier or later data
You can easily look at earlier or later data by using the forw ard and back buttons above
the chart:
Note that when you open a device or interface chart from the device or interface lists it
will automatically to keep up to date, but using the for ward or back buttons will prevent
this from happening.
Changing the displayed chart
All charts have several views, only one of which is displ ayed at a time. You can change
which one is displayed using the tabs above the chart:
In this case, the utilization chart is displayed and the cor responding tab is raised.
The chart legend
Each charted element has a corresponding row in the lege nd below the chart. The
legend may also have a row for other elements that were not b ig enough to be charted
separately. Depending on the type of chart, some elements in the legend may be
underlined; this indicates that more information is available by hovering the mouse over
the text.