A BGP4 confederation consists of
multiple sub-autonomous (sub-AS) systems.
Procedure
-
Access global configuration
mode.
device# configure terminal
-
Access BGP configuration mode.
device(config)# router bgp
-
Identify the sub-AS in which
your device resides.
device(config-bgp-router)# local-as 65520
-
Assign an ASN as a BGP
confederation identifier.
device(config-bgp-router)# confederation identifier 100
In this example, sub-AS 65520 is now part of a confederation that
belongs to autonomous system 100.
-
Specify the ASNs of all BGP
peers that you want to add to the confederation.
device(config-bgp-router)# confederation peers 65520 65521 65522
Example
The following example summarizes the commands in
this procedure.
device# configure terminal
device(config)# router bgp
device(config-bgp-router)# local-as 65520
device(config-bgp-router)# confederation identifier 100
device(config-bgp-router)# confederation peers 65520 65521 65522
