Users Guide

Version Description
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
7.8.1.0 Introduced on the S-Series.
7.7.1.0 Introduced on the C-Series.
Usage
Information
After you enter this command, the software deletes the history routes and returns the suppressed routes
to the Active state.
The clear ip bgp dampening command does not clear the history paths.
clear ip bgp flap-statistics
Clear BGP flap statistics, which includes number of flaps and the time of the last flap.
C9000 Series
Syntax
clear ip bgp [vrf vrf-name] [ipv4 [multicast | unicast] | ipv6 unicast]
[flap-statistics [ipv4-address mask | ipv6–address mask] | filter-list as-
path-name | regexp regular-expression]
Parameters
vrf vrf-name (OPTIONAL) Enter the keyword vrf and then the name of the VRF to clear BGP
flap statistics corresponding to that VRF.
NOTE: You can use this attribute on a specific VRF to remove history routes
corresponding to that VRF. You can also use this attribute to return the
suppressed routes corresponding to a specific VRF to an active state.
ipv4 multicast (OPTIONAL) Enter the keyword ipv4 followed by the keyword multicast to
clear information related only to ipv4 multicast routes.
ipv4 unicast (OPTIONAL) Enter the keyword ipv4 followed by the keyword unicast to clear
information related only to ipv4 unicast routes.
ipv6 unicast (OPTIONAL) Enter the keyword ipv6 followed by the keyword unicast to clear
information related only to ipv6 unicast routes.
ipv4-address
mask
(OPTIONAL) Enter an IPv4 address in dotted decimal format and the prefix mask in
slash format (/x) to reset only that prefix.
ipv6–address
mask
(OPTIONAL) Enter the IPv6 address followed by the network mask to reset only
that prefix.
filter-list as-
path-name
(OPTIONAL) Enter the keywords filter-list then the name of a configured
AS-PATH list.
regexp regular-
expression
(OPTIONAL) Enter the keyword regexp then regular expressions. Use one or a
combination of the following:
● . = (period) any single character (including a white space).
● * = (asterisk) the sequences in a pattern (0 or more sequences).
● + = (plus) the sequences in a pattern (1 or more sequences).
● ? = (question mark) sequences in a pattern (either 0 or 1 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.
Border Gateway Protocol 337