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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
protocol data unit (PDU)
A unit or a packet of information exchanged between peer entities in a
particular protocol stack. The PDU is typically submitted to the next lower
(server) layer for transfer to its peer and can contain an embedded PDU of the
next higher (client) layer.
protocol independent multicast-sparse mode (PIM-SM)
A protocol for routing multicast traffic to sparsely populated receivers that
supports scalable multicast routing, independent of any unicast routing
protocol.
provider nodes (P)
The P node is a backbone router that provides the MPLS and IGP connectivity
between ingress and egress PE nodes. The P nodes never connect to CE
devices and do not keep any VPN routing information. On the MPLS
backbone, the P node acts as a core Label Switch Router (LSR), switching
MPLS packets along the Transport LSP tunnels used to forward VPN traffic
from PE to PE. This way, the P node only acts on the outer transport label
present on the packet label stack.
provider edge router (PE)
A router that is part of a service provider’s network connected to a customer
edge (CE) router. All MPLS VPN processing occurs in the PE router.
provisionable attribute
A component attribute that causes a Nortel Multiservice Switch subsystem or
service to perform or behave in a certain manner. All components that are
provisioned are saved to be used again when the system restarts.
Provisionable attribute values can be configured by the network operator or
administrator. Some components with provisionable attributes are mandatory
and are created automatically. Components with provisionable attributes can
also have operational attributes.
provisioned component
A component that is configured using operator commands. It usually contains
provisioned attributes and subcomponents. The provisioned information is
usually permanent, that is, retained in the event of a power outage.
provisioning
The act of setting the values of the data required to operate the system.
Provisioning involves adding, deleting, or changing components and setting
the values of their attributes.