Agilent Technologies J3972A Guia do Utilizador descarregar pdf (Página 236)

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Internetwork Monitor

Interpreting the Internetwork View

5967–9446 235

Non-Routed Trafﬁc

When Internetwork Monitor cannot determine that trafﬁc is routed, it

constructs connector nodes, called pseudo-devices, on the segments.

In particular, pseudo-devices are added when:

● The network layer shows a conversation pair’s end points on different

segments. and

● The MAC layer also shows the end points on different segments.

To represent this trafﬁc, Internetwork Monitor constructs a connector

node for the trafﬁc end point that doesn’t reside on the segment. The

connector is represented by MAC address 0:0:0:0:0:0 and is assigned the

name Pseudo-Device.

For example:

● The network layer shows node A on segment S1 is talking to node D on

segment S2.

● The MAC layer also shows that node A on S1 is talking to node D on S2.

In this case, end point D doesn’t reside on S1, so Internetwork Monitor

adds a pseudo-device P1 on segment S1. Similarly, end point A doesn’t

reside on segment S2, so pseudo-device P2 is added to S2.

The data report for intrasegment trafﬁc will show entries for A↔P1 and

D↔P2; the segment-to-segment trafﬁc will include the A↔D trafﬁc in

the S1↔S2 segment pair’s data.

Figure 51 on page 236 illustrates this example, showing how the trafﬁc is

handled.

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