Avaya Configuring ATM DXI Services Manual de usuario Pagina 58

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Configuring ATM DXI Services
5-4 117375-A Rev. A
Selecting a Multiprotocol Encapsulation
You can use one of three multiprotocol encapsulation methods for each ATM DXI
PVC -- LLC/SNAP, NLPID, and NO MPE.
We recommend that you use the default setting, LLC/SNAP, when selecting a
multiprotocol encapsulation method. However, keep the following exceptions in
mind:
If you are running a router software version earlier than Version 8.00, use
NLPID for backward compatibility.
If you specify NO MPE, the router interprets this as virual channel-based
multiplexing, which is not supported for bridging.
Selecting a CS PDU Encapsulation
You can use one of three CS PDU encapsulation methods at the ATM DXI PVC
level -- AAL 5 Encapsulation, AAL 3/4 Encapsulation, and No Encapsulation.
Normally, any new PVCs use the default AAL 5 encapsulation. Setting the CS
PDU encapsulation method to AAL 3/4 at the interface level makes all new PVCs
that you add to the interface automatically use AAL 3/4 encapsulation. Defining
the CS PDU encapsulation on the PVC level overrides the default value that you
set on the interface level.
You can use No Encapsulation (a proprietary value) if you do not want the PVC to
use any CS PDU encapsulation.
Appendix , “Multiprotocol Encapsulation
Caution: When assigning data encapsulation to an interface, make sure that
the encapsulation method matches that of the DSU/CSU.
Appendix , “CS PDU Encapsulation
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