Avaya Configuring ATM DXI Services Manual de usuario descargar pdf (Pagina 55)

117375-A Rev. A 5-1

Chapter 5

Customizing ATM DXI PVCs

Once you add PVCs to your router, you may want to customize them for your

speciﬁc network conﬁguration.

Setting a VPI/VCI Pair

A virtual path is a set of virtual channels between a common source and

destination. The virtual channels within a virtual path logically associate to a

common identiﬁer. This identiﬁer is called the virtual path identiﬁer (VPI) and is

part of the cell header.

A virtual channel is a logical connection between two communicating ATM

entities. Each virtual channel may carry a different protocol or trafﬁc type. The

virtual channel transports cells that have a common identiﬁer. The identiﬁer is

called the virtual channel identiﬁer (VCI) and is part of the cell header.

Note: You must ﬁrst add an ATM DXI interface to the router and add PVCs to

that interface before you can customize any PVCs. For instructions on how to

start ATM DXI, how to add ATM DXI interfaces, or how to add PVCs to an

ATM DXI interface, refer to Cha

pter 1.

Note: ATM DXI does not allow duplicate VPI/VCI pairs on the same ATM

physical interface (that is, on the same link module). However, duplicate

VPI/VCI pairs can exist on different physical interfaces (that is, on different

link modules).

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Avaya Configuring ATM DXI Services Manual de usuario Pagina 55