Avaya Configuring ATM and MPLS Services Uživatelský manuál stáhnout pdf (Strana 91)

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Starting ATM, ATM MPOA Server, ATM Router Redundancy, and MPLS

117374-C Rev 00

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Defining LEC Service

To define a LAN emulation client (LEC) service record, navigate to the ATM

interface prompt and enter:

lec-service

<service_name>

encapsulation

<encapsulation_type>

service_name

is a unique text string that you assign to the service record.

encapsulation_type

is the data encapsulation type that you want the LEC service

record to use.

For example, the following command defines a LEC service record with the name

“newyork” on ATM slot 5, connector 1:

atm/5/1# lec-service newyork encapsulation lec

lec-service/newyork#

Adding PVCs

You must add at least one PVC to a PVC service record for that service record to

operate. A PVC is defined by its 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 with 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 can 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:

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