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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
reachability spanning tree
A collection of PNNI nodes that are reachable from the local PNNI node.
reachable NSAP address
The subcomponents address (provisioned under the Trk component) and
summaryAddress (provisioned under the Rtg component) that are broadcast
and stored in the Base Routing Topology Database. They are also referred to
as reachable addresses. See NN10600-435 Nortel Multiservice Switch 7400/
15000/20000 Operations: Path-Oriented Routing System for more
information.
real-time clock (RTC)
The clock that maintains the current time of day.
real-time statistics
Performance measurements that are collected by the data collection system
(DCS) from various applications. These real-time statistics are used for day-
to-day troubleshooting activities.
real-time statistics collection interval
The 5-minute collection interval during which real-time statistics (performance
measurements) are collected. This interval is based on network time and
occurs across the network beginning on the hour.
real time variable bit rate (rt-VBR)
A QOS class that defines a connection’s throughput as tightly constrained for
delay and delay variation. Sources are expected to transmit at a rate that
varies over time. This QOS supports statistical multiplexing or real-time
sources. It is intended to support real-time applications such as voice and
video.
RED
See random early detection (RED) (page 110).
reduced cell loss mechanism (RCL)
The reduced cell loss mechanism is a proprietary Nortel Multiservice Switch
feature that acts to reduce cell loss while hot swapping the data path during
path optimization.
region ID
The attribute that identifies the topology region to which a Nortel Multiservice
Switch node belongs. See NN10600-060 Nortel Multiservice Switch 7400/
15000/20000 Component Reference for more information.
reload
The action of loading software from disk.