Bgp Confederation Peers - Allied Telesis SwitchBlade x908 Series Software Reference Manual

BGP Commands

bgp confederation peers

This command configures the Autonomous Systems (AS) that belong to the same
confederation as the current switch.
A confederation allows an AS to be divided into several sub-ASs. The overall AS is given a
confederation identifier. External routers view only the whole confederation as one AS, whose
AS number is the confederation identifier. Each sub-AS is fully meshed within itself and is visible
internally to the confederation.
Use the bgp confederation peer command to define the list of AS numbers of the sub-ASs
in the confederation containing the current switch.
The no bgp confederation peers command removes an autonomous system from the
confederation.
Syntax
bgp confederation peers <1-65535>
no bgp confederation peers <1-65535>
Parameter
<1-65535>
Router mode
Mode
In the following configuration of Router1 the neighbor 172.210.30.2 and
Usage
172.210.20.1 have iBGP connection within AS 100. The neighbor 173.213.30.1 has
an BGP connection, but it is within AS 200, which is part of the same confederation. The
neighbor 6.6.6.6 has an eBGP connection to external AS 500.
In the configuration of Router2, neighbor 5.5.5.4 has an eBGP connection to
confederation 300. Router2 does not know about the ASs 100 and 200, it only knows
about confederation 300.
Router1
Router1(config-router)#
Router1(config-router)#
Router1(config-router)#
Router1(config-router)#
Router1(config-router)#
Router2(config-router)#
Router2
Router2(config-router)#
38.14
Description
AS numbers of eBGP peers that are under same confederation but in a
different sub-AS.
Router1(config)# router bgp 100
bgp confederation identifier 300
bgp confederation peers 200
neighbor 172.210.30.2 remote-as 100
neighbor 172.210.20.1 remote-as 100
neighbor 173.213.30.1 remote-as 200
neighbor 6.6.6.6 remote-as 300
Router2(config)# router bgp 500
neighbor 5.5.5.4 remote-as 300
Software Reference for SwitchBlade® x908, x900 and x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1 C613-50007-01 REV B