Ip As-Path Access-List - Juniper JUNOSE SOFTWARE 11.0.X - COMMAND REFERENCE A TO M 1-11-2010 Command Reference Manual

ip as-path access-list

ip as-path access-list accessListName { permit | deny } pathExpression
Syntax
no ip as-path access-list accessListName [ { permit | deny } pathExpression ]
Command introduced before JUNOSe Release 7.1.0.
Release Information
Defines a BGP-related access list. You can specify an access list filter on both inbound
Description
and outbound BGP routes. Each filter is an access list based on regular expressions.
If the regular expression matches the representation of the AS path of the route as
an ASCII string, then the permit or deny condition applies. The AS path does not
contain the local AS number. The no version removes a single access list entry if
permit or deny and a pathExpression are specified. Otherwise, the entire access list
is removed.
Options
accessListName Name of the access list; a string of up to 32 characters
permit Permits access for matching conditions
deny Denies access to matching conditions
pathExpression Regular expression describing the AS paths to be matched
Use a sequence of one or more elements, each of which is either an AS number
or one of the following punctuation characters:
^ start of the path
$ end of the path
{ start of an AS_SET
} end of an AS_SET
( start of an AS_CONFED_SET or AS_CONFED_SEQ
) end of an AS_CONFED_SET or AS_CONFED_SEQ
Use the following regular expression metacharacters to match individual elements:
. matches any single element
* matches zero or more occurrences of any element
+ matches one or more occurrences of any element
[ ] matches any elements enclosed between brackets ([ ])
- hyphen; used within brackets to specify a range of AS numbers
Chapter 10: I Commands
727
ip as-path access-list