Agilent Technologies J3972A User's Guide Page 228

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Interpreting the Internetwork View
To construct the graphical view, Internetwork Monitor looks at the end-
to-end network-layer traffic data from each data source according to the
current filter and threshold settings. Each node is assigned to a segment
based on the current placement method, Address or Traffic, as discussed
on the next page.
Next, Internetwork Monitor integrates the data based on the current
view type: Segment, Network layer, or MAC layer. This step is discussed
in detail on pages 231 through 236. You can see the integrated data
values by viewing the data report, as discussed on page 182.
Finally, the graphical view is constructed. Lines connect nodes and seg-
ments based on the integrated data. Line colors and thickness indicate
the contribution level for a particular line’s traffic, relative to the total
traffic, as discussed on page 187.
Node-to-Segment Assignments
Internetwork Monitor uses the concept of a segment map to derive the
network segment topology—that is, the node-to-segment assignments for
the view. The assignment of end-point nodes depends on whether the
placement method is Address or Traffic, as discussed below.
For Traffic placement, the segment map generated by Internetwork Mon-
itor may not exactly match your network’s topology. For best results,
ensure the following when using Traffic placement:
The internetwork is populated with many data sources, with one data
source per segment you want to monitor.
Data sources have been collecting data for sufficiently long duration.
Data sources’ clocks are at least loosely synchronized.
To ensure placement accuracy, you can move nodes to assign them to
their proper segments. Refer to page 208 for details.
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