Juniper IP SERVICES - CONFIGURATION GUIDE V 11.1.X, Configuration Manual

Page: 74 / 366

Table 6: Sample Regular Expressions (continued)
Example
Matched AS-Path or Community
Attribute Regular
Expression
1373737 29 44 37137 78
137 42 21
but not
4 372 2121 37 5
1 456 881
Includes a sequence that has a numeral
1 immediately followed by
one or more
instances of the pattern 37
1(37)+
67 42 714 359 78
but not
33 252 422 48
Includes a number that has a numeral
4 followed by
zero or only one instance
of the numeral 2
42?
137 42 2153 612 49
1
but not
4 13737 78
Includes a sequence that has a numeral
1 followed by
zero or only one instance
of the pattern 37
1(37)?
600 700 10025 7771
In the following examples,
the three characters are 7,
space, 8:
307 800 6127 888 999
Includes a sequence of three characters,
where the first character is numeral 7 7..
6127 723 999 700 100 600
but not
25 7771307 800
Includes a number in the range 700 –
799 ^7..
723 700
but not
25 7771307 800
6127 723 999700 100 600
Consists only of a number in the range
700 – 799 ^7..$
60 4334 545 92
200710
86 53
The regular expression [162]
has the same results.
Includes any of the numerals 6, 2, or 1 [621]
Includes any number in the range 0–9 [0-9]
(22 431) 102(22 431) 55 76
but not
43 (22 431) 522 431 59
(AS-path attribute only) Begins with the
AS-confed-set or AS-confed-seq (22 431) ^\(22 431\)
48 ■
Using Regular Expressions
JUNOSe 11.1.x IP Services Configuration Guide