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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
shared bus interface controller (SBIC)
An ASIC used to manage and manipulate queues and blocks within the
shared memory and to coordinate all direct memory access (DMA) into the
shared memory. The queue controller (QC) is part of the SBIC.
shared memory
A common memory pool on a processor card in which all blocks, buffers, and
queues are stored. Frames enter Nortel Multiservice Switch nodes from a
network link to the interfacing function processor where they are stored in
memory. Multiservice Switch software then determines each frame’s
destination. Once destinations are determined, the hardware moves the
frames through the processor card without further software intervention.
Direct memory access into the shared memory is controlled by the shared bus
interface controller.
shared multicast distribution tree
A multicast distribution tree rooted at a well-known point such as an RP
through which receivers hear of new sources and new receivers hear of all
sources.
shelf
Refers to the processor card section, the power converter section, the cooling
unit, and the cable management assembly. The shelf provides power and
communication between processor cards through the backplane.
shelf management system (SMS)
The software system responsible for managing the software and hardware of
the shelf. It consists of three major subsystems: the software control system
(SCS), the bus/backplane control system (BCS) and the processor control
system (PCS).
shortest path first (SPF)
A class of routing protocols that use Djikstra’s algorithm to compute the
shortest path through a network, according to specified metrics, for efficient
transmission of packet data.
shortest path tree (SPT)
A multicast distribution tree created by the merger of all the shortest paths that
connect receivers to the source of the multicast data packets.
short loop
A configuration where there is no AQM on the egress FP.
signaling
The exchange of electrical information specifically concerned with the
establishment and control of connections in a communication network.