BGP confederation
Encyclopedia
In network routing, BGP confederation is a method to use Border Gateway Protocol
(BGP) to subdivide a single autonomous system
(AS) into multiple internal sub-AS's, yet still advertise as a single AS to external peer
s. The intent is to reduce IBGP mesh size.
Border Gateway Protocol
The Border Gateway Protocol is the protocol backing the core routing decisions on the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems . It is described as a path vector protocol...
(BGP) to subdivide a single autonomous system
Autonomous system (Internet)
Within the Internet, an Autonomous System is a collection of connected Internet Protocol routing prefixes under the control of one or more network operators that presents a common, clearly defined routing policy to the Internet....
(AS) into multiple internal sub-AS's, yet still advertise as a single AS to external peer
Peering
In computer networking, peering is a voluntary interconnection of administratively separate Internet networks for the purpose of exchanging traffic between the customers of each network. The pure definition of peering is settlement-free or "sender keeps all," meaning that neither party pays the...
s. The intent is to reduce IBGP mesh size.