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16. Setting Up Fault Management Configuring Event Parsers

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AlliedView NMS Administration Guide

Tokenizer

String

Allows you to break up the input field into a series of tokens that can then be used in the output

Event object. The tokenizer definition is a string with the tokens represented by $1, $2, etc. Only

positive integers are allowed following '$'.

Example:

Consider the case, where you expect an event message text string as:

Line Card 31 failed on Shelf 54: No Response - (Match String).

The Line Card Number (31) and the Shelf Number (54) may be required while defining other

properties of event, so they will be tagged as tokens with a token number.

Line Card $1 failed on Shelf $2: No Response - (Tokenizer String).

After such tokenization, the token number is used in the output event definition. Specifying $text$1

for any field in the output event definition will be replaced with the value 31, while specifying

$text$2 will be replaced with 54.

Note: To identify the Replaceable parameter of a specific field, the token number should be

preceded by the field, for example $text$1 indicates the first tokenized string of the field

Message.

The tokens of any field can be used in any other field, provided this Note is followed.

Output String The output of the event parser is an Event object, which will be the modified instance of the

incoming event. The attributes of the Event object are defined by what are specified in the event

parser, so it is necessary to select correct values for important attributes such as failure object

(affected Entity), severity, and message text.

The properties that should remain unchanged must be specifically noted by placing a dollar followed

by that property name. For example, if the text field should not be modified, then the value $text

should be entered in the Output String.

When specifying the output values in the definition column, to use the values of the incoming event

properties, you should specify the exact property name (case sensitive) with a prepended $. For

example to use the event property source, the definition should be $source. If the particular property

has been tokenized and if user intends to use the value of the token, then the format should be

$propertyname$N, where N should be the count of the token starting with 1.

When it is necessary to deliberately have a null value for a specific property of the Output Event,

then the Output String for that property should be left blank.

The default properties of event that can be used in the definition column following $ are: category,

domain, entity, groupName, helpURL, network, node, source, severity, text, WebNMS. Apart from the

listed default properties of the event, user property names can also be used.

For the list of the various Event Properties and their description, refer to Event Properties.

TABLE 16-4 Event Parser Configuration Form (Continued)

Option Description

1 2 ... 901 902 903 904 905 906 907 908 909 910 911 ... 994 995

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