Discover network names – Network Instruments GigaStor 114ff User Manual
Page 80
Discover Network Names
Chapter 5 Using Observer with a WAN Probe
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rev. 1
In general, the WAN analysis works much like Ethernet analysis. One
difference is that, when appropriate, Observer identifies WAN links
by their Data Link Connection Identifier (DLCI) rather than by MAC
address as is done with standard protocol analysis. In addition, many
WAN statistical modes break out the data by DCE, DTE, and
summary to reflect the full-duplex nature of WAN links. Modes
unrelated to WAN analysis are greyed out and unavailable.
The following sections describe how the available Observer modes
operate to analyze a WAN link.
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“Discover Network Names” on page 80
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“WAN Bandwidth Utilization” on page 82
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“WAN Vital Signs by DLCI” on page 83
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“Triggers and Alarms” on page 88
Discover Network Names
To access this mode, choose Tools
→ Discover Network Names
Discover Network Names mode will show DLCIs instead of MAC
addresses. You can also define the Committed Information Rate for
each DLCI you are monitoring with WAN Observer.
Setting the Committed Information Rate (CIR) for a DLCI
The Committed Information Rate defines the guaranteed bandwidth
for a WAN connection. If you want Observer’s WAN Vital Signs and
WAN Load by DLCI to monitor CIR compliance, you must specify
the CIR. A number of WAN triggers and alarms also use this
information, allowing you to be notified if the link is not performing
to the CIR.
For encapsulations that do not use DLCI (such as X.25), just use the
address scheme for your encapsulation.