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dns | icmp | ietf | ined | inet | job | map | mib | netdb | ntp | snmp | sunrpc | syslog | term | udp
TNM::Map
Attributes
Every map and every item
can have arbitrary user-defined attributes. These attributes can be used
for different purposes:
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Attributes can be used to attach
useful administrative information to network maps or items, like contact
information or registration numbers.
-
Attributes can contain parameters
that are needed in order to talk to an item, like for example parameters
for SNMP sessions.
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Attributes can specify parameters
that control monitoring or testing functions. A classic example is an attribute,
which allows defining the interface speed in case the interface speed reported
by an SNMP agent does not match reality.
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Attributes can store temporary
information that is needed by monitoring or testing functions in order
to complete their job.
An attribute naming convention
is used to make sure that attributes can be used for all these purposes
without the risk to run into name clashes.
Attributes are grouped into
persistent and non-persistent attributes. (Persistent attributes are saved
with a network map while non-persistent attributes are ignored.)
Attribute names may only
consist of uppercase and lowercase letters, digits and the symbol ‘:’.
Persistent attribute names use the following naming scheme:
[Scope]:Name[:Qualifier]*
A persistent attribute name
usually starts with a scope name, which is a capitalized string. An attribute
name, which must be capitalized, is said to be global if the scope name
is missing. (This means that the name starts with a colon.)
Multiple qualifiers can follow
the name, where each qualifier is separated by a colon. Examples of persistent
attribute names are:
:Contact
Icmp:Timeout
Tnm:Monitor:ifSpeed:1
Non-persistent attributes have
no restriction, except that they are not allowed to start with a capital
letter or a colon. It is however recommended that you qualify non-persistent
names with a common prefix in order to avoid name clashes.
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