Avaya Configuring ATM Services Manual de usuario Pagina 52

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Configuring ATM Services
2-12 114056 Rev. A
Encapsulation Rules for PVCs
How you assign data encapsulation to individual PVCs depends somewhat on the
data encapsulation type you have assigned to the service record that contains those
PVCs. Table 2-2 provides suggestions for assigning data encapsulation to PVCs
and Hybrid PVCs that reside on these service records.
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.
Table 2-2. Assigning Data Encapsulation to Individual PVCs
Service Record data
encapsulation type
Individual PVC data
encapsulation type
Hybrid PVC data
encapsulation type
LLC/SNAP NULL or LLC/SNAP LLC/SNAP
NULL NULL or LLC/SNAP LLC/SNAP
NLPID NLPID NLPID
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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