Commonly Used Characters in Expressions

. Any single character, including a space

* Zero or more sequence of pattern

+ One or more sequence of pattern

? Zero or one occurrence of pattern

A Beginning of string

$ End of string

_ Match any delimiter (including beginning, end, space, tab, comma)

\ Remove special meaning of character that follows

[ ] Match one character in a range

| Logical OR

The figure lists the most commonly used characters in expressions.

3-28 Configuring BGP on Cisco Routers (BGP) v3.2 © 2005, Cisco Systems, Inc.

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