Reference Guide

regexp regular-
expression
Enter a regular expression then use one or a combination of the
following characters to match. The range is 256 characters.
• . = (period) any single character (including a white space).
• * = (asterisk) the sequences in a pattern (zero or more
sequences).
• + = (plus) the sequences in a pattern (one or more
sequences).
• ? = (question mark) sequences in a pattern (either zero or
one sequences).
NOTE: Enter an escape sequence (CTRL+v) prior to
entering the ? regular expression.
• [ ] = (brackets) a range of single-character patterns.
• ( ) = (parenthesis) groups a series of pattern elements to a
single element.
• { } = (braces) minimum and the maximum match count.
• ^ = (caret) the beginning of the input string. If you use the
caret at the beginning of a sequence or range, it matches on
everything BUT the characters specified.
• $ = (dollar sign) the end of the output string.
Command Modes
• EXEC
• EXEC Privilege
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced on the S-Series.
Version 7.7.1.0 Introduced on the C-Series.
Usage
Information
The following describes the show ip bgp flap command shown in the following
example.
Field Description
Network Displays the network ID to which the route is flapping.
From Displays the IP address of the neighbor advertising the flapping
route.
Flaps Displays the number of times the route flapped.
Duration Displays the hours:minutes:seconds since the route first flapped.
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