Viavi Apex Enterprise G3-APEX-ENT-32T, User Manual

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Introducing Probes
Chapter 4: About Probe Instances 203
Probes monitor the following topologies:
♦
10/100 Mb, 1/10/40 Gb Ethernet (half- and full-duplex)
♦
Wireless ( 802.11 a/b/g/n)
Figure 108 (page 203) shows how probes provide visibility into your network. It
may be obvious, but it also shows that you cannot see traffic on portions of your
network where you do not have a probe. Finally, you can put Observer anywhere
on your network so long as it has TCP connectivity to the probe.
Figure 108: Typical network
What is a probe instance?
Observer has only one kind of probe instance: the probe instance . If you have a
GigaStor then you have two special probe instance types available to you: the
active probe instance and the passive probe instance .
Observer uses probes to capture network data. In some cases you may want or
need more than one probe in a specific location. You can achieve that through
probe instances. A probe instance provides you the ability to look at multiple
network interfaces, have multiple views of the same interface, or to publish to
multiple Observer.
Table 4 (page 203) compares the features of active and passive probe instances
with an Observer probe instance found on all non-GigaStor probes.
Table 4. Active vs. passive GigaStor instances and Observer probe
GigaStor Active
probe instance
GigaStor Passive
probe instance
Observer Probe
1
Better suited for
troubleshooting
X X
Better suited for
data capture
X
Start packet
capture
X X X
Stop packet
capture
X X X
Start GigaStor
packet capture
X