White Papers

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
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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.
Reuse Displays the hours:minutes:seconds until the flapped route is available.
Path Lists all the ASs the flapping route passed through to reach the destination
network.
Example
Dell>show ip bgp flap-statistics
BGP table version is 210851, local router ID is 63.114.8.2
Status codes: s suppressed, d damped, h history, * valid, > best
Path source: I - internal, a - aggregate, c - confed-external,
r - redistributed, n - network
Origin codes: i - IGP, e - EGP, ? - incomplete
Network From Flaps Duration Reuse Path
Dell>
show ip bgp inconsistent-as
View routes with inconsistent originating autonomous system (AS) numbers; that is, prefixes that are announced from the same
neighbor AS but with a different AS-Path.
Syntax
show ip bgp [ipv4 unicast] inconsistent-as
Command Modes
● EXEC
Border Gateway Protocol IPv4 (BGPv4) 315