
Route Map Commands
©2008 Allied Telesis Inc. All rights reserved.
32.16
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
Software Version 5.2.1
set as-path
Use this command to add an AS path set clause to a route map entry.
When a BGP update message matches the route map entry, the device prepends the specified
Autonomous System Number (ASN) or ASNs to the update’s AS path attribute.
The AS path attribute is a list of the autonomous systems through which the announcement for
the prefix has passed. As prefixes pass between autonomous systems, each autonomous
system adds its ASN to the beginning of the list. This means that the AS path attribute can be
used to make routing decisions.
Use the
no
parameter to remove the set clause.
Syntax
set as-path prepend
<1-65535> [<1-65535>]...
no set as-path prepend
Mode
Route-map mode
Usage
This command is valid for BGP update messages only.
Examples
To use entry 3 of the route map called “myroute” to prepend ASN 8 and 24 to the AS path of
matching update messages, use the commands:
awplus(config)#route-map myroute permit 3
awplus(config-route-map)#set as-path prepend 8 24
Related Commands
match as-path
route-map
show route-map
Parameter
Description
ASN
The number to prepend to the AS path. If you specify
multiple ASNs, separate them with spaces.