Agilent Technologies 622Vu Advisor, User Manual

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2.1 Overview of Processing
Monitor Mode vs. End Station
You can operate 622Vu in monitor mode or as an end station:
•
When operating in monitor mode, the 622Vu Advisor passively observes the
traffic flow coming through it, optionally capturing some or all traffic for
further analysis.
•
In end-station mode, the 622Vu Advisor is a known, visible end station on
the network, capable of transmitting ATM cells, ping messages, and
QoSMeter tests, as well as monitoring and capturing traffic as it’s received.
Capturing Traffic
In either mode, 622Vu lets you capture traffic as it moves through the analysis
device, and analyzes the functional characteristics of the ATM DUT (device
under test) as reflected by that traffic.
You can filter the incoming traffic if you wish, to restrict the capture to certain
types of cells or specific paths, or simply to restrict the amount of memory used
to store captured cells. 622Vu offers a variety of filtering capabilities, including
real-time filtering by IP address, VCC, and/or protocol.
After a capture finishes, you can search the capture file for specific values, create
(and save) virtually any subset(s) of the captured cells or PDUs, and optionally
turn the capture (or subset) into a script that you can then send over the network
for further analysis. If you save a capture file, you can then export it in any of
several formats: full textual decode, the standard 622Vu format, or Network
Associates Sniffer format
Real-time Statistics
Any time you’re not capturing traffic actively, 622Vu lets you monitor real-time
statistics for the link attached to an analysis device. At your request, it displays
the active network connections on the link, providing statistics in a tabular
fashion so you can track bandwidth use easily. It also offers a graphing
capability, so you can lay out the statistics in graphical form.
Each time 622Vu detects a new connection, it displays the corresponding VP/VC
identifiers and begins tracking statistics for that connection. If you notice a
2: Introduction
2.1 Overview of Processing
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