Allied Telesis VERSION 5.4.3-2.6 Ip as-path access-list BGP and BGP4+, Deny, Permit, Reg-exp

BGP and BGP4+ Commands

ip as-path access-list (BGP and BGP4+)

This command defines a BGP and BGP4+ Autonomous System (AS) path access list.

The named AS path list is a filter based on regular expressions. If the regular expression matches the AS path in a BGP update message, then the permit or deny condition applies to that update. Use this command to define the BGP access list globally, then use neighbor configuration commands to apply the list to a particular neighbor.

The no variant of this command disables the use of the access list

Syntax [BGP/BGP4+] ip as-path access-list <listname> {denypermit} <reg-exp>

no ip as-path access-list <listname> {denypermit} <reg-exp>

Parameter	Description
<listname> Specifies the name of the access list.
deny	Denies access to matching conditions.
permit	Permits access to matching conditions.
<reg-exp>	Specifies a regular expression to match the BGP AS paths.

Regular expressions listed below can be used with the ip as-path-access-listcommand:

	Symbol	Character		Meaning
^		Caret		Used to match the beginning of the input string. When used at
				the beginning of a string of characters, it negates a pattern
				match.
$		Dollar sign		Used to match the end of the input string.
.		Period		Used to match a single character (white spaces included).
*		Asterisk		Used to match none or more sequences of a pattern.
+		Plus sign		Used to match one or more sequences of a pattern.
?		Question		Used to match none or one occurrence of a pattern.
		mark
_		Underscor		Used to match spaces, commas, braces, parenthesis, or the
		e		beginning and end of an input string.
[ ]		Brackets		Specifies a range of single-characters.
-		Hyphen		Separates the end points of a range.
Mode [BGP/BGP4+] Global Configuration
Example
[BGP/BGP4+]		awplus#	configure terminal
	awplus(config)#		ip as-path access-list mylist deny ^65535$

	Software Reference Supplement for SwitchBlade® x8112, x908, x900 and x610 Series Switches
3.66	AlliedWare PlusTM Operating System - Software Version 5.4.3-2.6	C613-50032-01 REV D