NS3000/iX NMMGR Screens Reference Manual - Edition 9 (36922-90040)

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to both the OpenView workstation and to
the MPE host.
logging class A number defining the
severity of any given event logged. An
operator uses the logging classes to specify
which events are to be logged. Class 1
(catastrophic event) is always logged.
logical device number (ldev) A value by
which operating system recognizes a
specific device. All DTC devices that are
configured as nailed devices through the
NMMGR configuration have ldev numbers
permanently assigned. The DTC devices
can then be accessed programmatically
through use of their ldev number.
Non-nailed devices have ldev numbers that
are assigned from a pool of available ldev
numbers for the life of their connection to a
system. Each nailed port configured in
NMMGR must have a unique ldev number.
log off The termination of a job or session.
log on The process of initiating a job or
session.
logon device See session-accepting
device.
loopback The routing of messages from a
node back to itself.
LUG Local User Group. A list defined for a
particular DTC and card that specifies
which remote nodes this DTC can send data
to and also which remote nodes this DTC
can receive data from. See also local user
group.
M
maintenance mode An NMMGR
character mode interface used to manage
both network directory and configuration
files. It can be used interactively, from
within the screen mode interface, or as a
set of commands entered via a batch job.
map, network A drawing that shows the
topology of the network. For networks
managed by the OpenView DTC Manager a
network map must be created through use
of the OVDrawcapability provided with the
management software. A network map is
also a hardcopy drawing used when
planning a network. It shows network
topology, node and network names,
addresses, network boundaries (for an
internetwork map), and link types.
mapping A set of characteristics that
describe a route taken by messages to
reach a destination node. This set of
characteristics is configured with NMMGR
at every node on a point-to-point network.
One mapping is configured at each node for
every other node on the network to which
messages will be sent.
MAU Medium Attachment Unit. A device
attached to a ThickLAN coaxial cable that
provides the physical and electrical
connection from the AUI cable to the
coaxial cable.
M bit More data bit. Setting this bit in a
DATA packet indicates that at least one
more DATA packet is required to complete
a message of contiguous data.
medium attachment unit A device
attached to a ThickLAN coaxial cable that
provides the physical and electrical
connection from the AUI cable to the
coaxial cable.
MIT Master Installation Tape. A magnetic
tape containing the Fundamental
Operating System for an HP e3000
computer.
modem modulator/demodulator. A device
that modulates and demodulates signals.
Primarily used for modulating digital
signals onto carriers for transmission and
for performing the inverse function at the
receiving end. Modems are essential for