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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
option
An option modifies the behavior or provides more information about a verb
being applied to a component. For example, the display -p option shows
provisioned data and the display -o option shows operational data.
option type
The data type of an option.
option value
The entered value for an option, as permitted by its type.
OSI
See Open Systems Interconnection (OSI) (page 93).
OSI state
Nortel Multiservice Switch systems define component states according to the
OSI standards. A component has three high-level state variables: operational,
usage, and administrative. These states are the primary factors affecting the
management state of the component. For more information, see
NN10600-520 Nortel Multiservice Switch 7400/15000/20000 Fault and
Performance Management: Troubleshooting
.
OSI status
In addition to the three state attributes, six status attributes exist within OSI.
The primary function of these attributes is to provide additional information
about a component’s operability and usage. The attributes are: alarm status,
procedural status, availability status, control status, standby status, and
unknown status. For more information, see NN10600-520 Nortel Multiservice
Switch 7400/15000/20000 Fault and Performance Management:
Troubleshooting.
OSPF
See open shortest path first (OSPF) (page 92).
outside link
A link to a lowest-level outside node. In contrast to an inside link (that is, a
horizontal link) or an uplink, an outside link does not form part of the PNNI
topology. As a result, nodes do not include outside links in route selection.
overflow routing
Overflow routing is the process by which Nortel Multiservice Switch networks
switch traffic from a chosen link to an alternate link, when the chosen link
becomes congested. Normal reliability traffic will overflow only to links in the
same link group. High reliability traffic can also overflow onto links in a different
link group, under certain conditions.