Agilent Technologies J3972A User's Guide Page 230

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Internetwork Monitor
Interpreting the Internetwork View
5967–9446 229
Interconnect Devices
After all end-point nodes are assigned to segments according to the
placement method, interconnect devices are discovered and placed based
on their MAC addresses; this process is discussed in detail on page 233.
Internetwork Monitor creates non-routing interconnect devices (called
“pseudo-devices”) as needed and adds them to the segment map.
Nodes on Unmonitored Segments
In some cases, Internetwork Monitor determines that a node is not part
of a monitored segment in the view:
For Address placement, the node is assigned to a segment based on its
network address (just as for any other node in the view), and a new
segment ring is shown, if necessary.
For Traffic placement, the node is assigned to a segment called Other.
For example, if the network layer and MAC layer addresses indicate
traffic passing through a router to or from a node that is not accounted
for in the current view, that node is assigned to the Other segment.
In addition, new nodes that are not part of the initial segment map (but
which appear during subsequent traffic updates) are assigned to the
Other segment when the placement method is Traffic.
Figure 35 on page 173 shows several nodes on unmonitored segments for
both Address and Traffic placement.
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