C613-50631-01 Rev A Command Reference for IE340 Series 1533
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
BGP AND BGP4+ COMMANDS
SET
AS-PATH
set as-path
Overview 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 variant of this command to remove the set clause.
Syntax
set as-path prepend <1-65535> [<1-65535>]...
no set as-path prepend [<1-65535> [<1-65535>]...]
Mode Route-map mode
Usage notes Use the set as-path command to specify an autonomous system path. By
specifying the length of the AS-Path, the device influences the best path selection
by a neighbor. Use the prepend parameter with this command to prepend an AS
path string to routes increasing the AS path length.
This command is valid for BGP update messages only.
Example 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# configure terminal
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
Command
changes
Added to AlliedWare Plus prior to 5.4.6-1
Version 5.4.7-2.1: BGP support added for x510 and x550 series
Version 5.4.7-2.4: BGP support added for IE300 series
Parameter Description
prepend Prepends the autonomous system path.
<1-65535> The number to prepend to the AS path. If you specify multiple ASNs,
separate them with spaces.
To Next Page
Loading...
Need help?
General
