Avaya Configuring ATM Half-Bridge Services Manual de usuario descargar pdf (Pagina 86)

Configuring ATM Half-Bridge Services

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308611-14.00 Rev 00

Assigning a Data Encapsulation Type for a PVC

With AHB, you must assign the Logical Link Control/Subnetwork Access

Protocol (LLC/SNAP; RFC 1294) to the PVC that you create. LLC/SNAP

encapsulation attaches an LLC/SNAP header before the PDU. This header

includes information that the receiver needs to properly process the incoming

PDU.

When assigning a data encapsulation type to a PVC or group of PVCs, keep the

following in mind:

• The Site Manager ATM Service Records List and ATM Virtual Channel Link

windows initially contain a default data encapsulation type of LLC/SNAP.

• When you add a PVC, it reads and uses the data encapsulation type specified

in its ATM service record.

• You can globally assign a data encapsulation type to all nonhybrid PVCs in a

particular service record, or you can assign a data encapsulation type to

individual group PVCs using the Site Manager ATM Virtual Channel Link

window.

• If you change the data encapsulation value in the Site Manager ATM Service

Records List window, all new PVCs that you add to that service record use the

new value.

PVC Access Methods

For AHB, you can set up PVCs to access an ATM network in the following ways:

• Multiple PVCs per sevice record

• One PVC per service record

Caution:

Changing the data encapsulation type at the service record level

changes the data encapsulation type for all nonhybrid PVCs on that service

record. For example, if you change the ATM service record data encapsulation

type from LLC/SNAP to NULL, the data encapsulation type for all PVCs

(except hybrid PVCs) on that service record changes to NULL. Site Manager

does not ask you to verify this change.

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Avaya Configuring ATM Half-Bridge Services Manual de usuario Pagina 86