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Test traffic can be sent and received by the same Advisor for local

testing or it can be sent by one Advisor and received on the other side

of the network by another. Each Advisor on either end of a connection,

can source test traffic in the opposite direction on the same bi-

directional virtual connection and, at the same time, analyze traffic from

the other; each Advisor is configured to source traffic conforming to the

traffic contract for that direction of the virtual connection; such

connections are often asymmetrical. As conforming test traffic is entering

the network, any cell loss or cell delay variation detected on the far side

of the network must be caused by the network itself; this can be

compared with the SLA requirement to check that the network is

complying with its side of the agreement. The Advisor is also capable of

generating same link background traffic (on other virtual connections).

For more details about policing and shaping, see the ATM QoS

White Paper (5968- 8556E).

Inverse Multiplexing for ATM (IMA)

The Advisor can now decode IMA Control Protocol cells. These ICP cells

are sent regularly on each E1 or T1 in an IMA Link Group in order to

manage the IMA process. The ability to decode and display these physical

layer cells helps troubleshooters identify IMA configuration problems.

ATM Signaling and Call Placement

While permanent virtual circuits (PVCs) have dominated the ATM world

thus far, switched virtual circuits (SVCs) are increasing in utilization.

The Advisor includes UNI signaling emulation, ILMI address registration

and LANE emulation to provide connectivity testing.

The signaling and call placement feature supports ATM Forum UNI

3.0, 3.1 and 4.0. The Advisor can emulate the user or network side of

the UNI. In addition, the user can specify and edit the information

elements (IEs) placed on Call Connect messages that specify what type of

SVC to bring up.

Health Monitor

The health monitor is an application that can run in the background of

any other ATM application giving the user an overall view of the ATM

network health. For ATM the health monitor has red/green light alarms

for ‘‘HEC’’ Errors, Line Status and Low Priority Cells (CLP=1).

When the Health Monitor alarm indicates a red light for any of these

variables, the user can double- click on the health monitor to bring up

the application where the error condition is found.

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Agilent Technologies 37907A Manual de usuario Pagina 18