Dell PowerConnect B-FCXs Configuration Manual page 1079

Special characters
When you enter as single-character expression or a list of characters, you also can use the
following special characters.
for each special character includes an example. Notice that you place some special characters in
front of the characters they control but you place other special characters after the characters they
control. In each case, the examples show where to place the special character.
TABLE 182
Character
.
*
+
?
^
$
_
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Table 182
BGP4 special characters for regular expressions
Operation
The period matches on any single character, including a blank space. For example, the
following regular expression matches for "aa", "ab", "ac", and so on, but not just "a".
a.
The asterisk matches on zero or more sequences of a pattern. For example, the following
regular expression matches on an AS-path that contains the string "1111" followed by any
value:
1111*
The plus sign matches on one or more sequences of a pattern. For example, the following
regular expression matches on an AS-path that contains a sequence of "g"s, such as "deg",
"degg", "deggg", and so on:
deg+
The question mark matches on zero occurrences or one occurrence of a pattern. For example,
the following regular expression matches on an AS-path that contains "dg" or "deg":
de?g
A caret (when not used within brackets) matches on the beginning of an input string. For
example, the following regular expression matches on an AS-path that begins with "3":
^3
A dollar sign matches on the end of an input string. For example, the following regular
expression matches on an AS-path that ends with "deg":
deg$
An underscore matches on one or more of the following:
•
, (comma)
•
{ (left curly brace)
•
} (right curly brace)
•
( (left parenthesis)
•
) (right parenthesis)
•
The beginning of the input string
•
The end of the input string
•
A blank space
For example, the following regular expression matches on "100" but not on "1002", "2100",
and so on.
_100_
on page 1037 lists the special characters. The description
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