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List of terms
Nortel Multiservice Switch 7400/15000/20000
Terminology
NN10600-005 7.2S1 Standard
PCR7.2 and up March 2006
Copyright © 2006, Nortel Nortel Confidential
In ATM networking, a unidirectional transport of ATM cells belonging to virtual
channels that are associated by a common identifier value called VPI.
virtual path connection (VPC)
A logical association among, or a group of, virtual channels that have the
same traffic characteristics and follow the same path in a network.
In ATM networking, a concatenation of virtual path links that extends between
the point where the virtual channel identifier values are assigned and the point
where those values are translated or removed.
virtual path connection identifier (VPCI)
In ATM networking, a connection identifier that the nodes at the ends of a
connection over virtual interfaces can use to establish a common identifier
from end to end. In non-associated and VP-associated signaling, the VPI has
the same value as the VPCI.
virtual path identifier (VPI)
A field in the ATM cell header that identifies the virtual path the cell is
associated with. Also, a VPI can form part of the identity of the virtual channel.
virtual path link (VPL)
A segment of a virtual path between two contiguous ATM layer entities that
process the cells of a virtual path, without unbundling the individual virtual
channels that comprise the virtual path. A virtual path link is identified by a
unique VPI value in the cell header.
virtual path termination CAC (VPT-CAC)
A connection admission control (CAC) technique that applies to VCCs under
a virtual path terminator. Compare with ATM interface CAC (AtmIf-CAC).
virtual path terminator (VPT)
An ATM network entity that unbundles a VPC into its VCC elements for
processing. There are two types of VPTs: basic and standard.
virtual private network (VPN)
See customer network management (CNM) (page 38).
virtual router (VR)
A common set of interfaces and support mechanisms for the IP protocol.
virtual router access point (VRAP)
A point of access to a VirtualRouter component that defines the IP logical
interface. This logical interface defines the subnet to which the IpMConn or
Control subcomponent is connected.