Avaya Configuring ATM DXI Services Manual de usuario Pagina 50

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Configuring ATM DXI Services
4-2 117375-A Rev. A
Changing the DXI Mode
The ATM DXI mode indicates the mode of operation for this interface based on
the ATM Forum ATM Data Exchange Interface Specification. Each mode relates
to different functional settings between the router and the DSU/CSU.
By default, the ATM DXI interface uses Mode 1A. This mode operates only with
AAL 5 encapsulation. Refer to “A
TM DXI Modes of Operation” in Chapter 2 for
a detailed description of each mode.
Assigning a Maximum Number of Virtual Circuits
By default, ATM DXI allows for a maximum of 512 permanent virtual circuits on
each interface; however, you can specify from 1 through 512 virtual circuits.
Note: The DXI header size is different for Modes 1A and 1B than for Mode 2
and Mode 2 Proprietary. This difference affects the values that you can set for
the VPI and VCI. Refer to “Setting a
VPI Number” and “Setting a VCI
Number” in Chapter 5 for the allowable VPI and VCI settings for each mode.
Appendix , “DXI Mode
Caution: When assigning data encapsulation to an interface, make sure that
the router encapsulation method matches that of the DSU/CSU.
Appendix , “Max number of VCs
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