Bgp Enforce-First-As - Allied Telesis IE340 Series Command Reference Manual

BGP BGP4+ C
AND OMMANDS
- -
BGP ENFORCE FIRST AS

bgp enforce-first-as

Overview Use this command to enforce the denying of eBGP updates in which the
neighbor's AS number is not the first AS in the AS-path attribute.
Use the no variant of this command to disable this feature.
Syntax bgp enforce-first-as
no bgp enforce-first-as
Mode Router Configuration
Usage This command specifies that any updates received from an external neighbor that
do not have the neighbor's configured Autonomous System (AS) at the beginning
of the AS_PATH in the received update must be denied. Enabling this feature adds
to the security of the BGP network by not allowing traffic from unauthorized
systems.
Example awplus#
awplus(config)#
awplus(config-router#
Command Added to AlliedWare Plus prior to 5.4.6-1
changes
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
C613-50631-01 Rev A
configure terminal
router bgp 100
bgp enforce-first-as
Command Reference for IE340 Series
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
1339