This document outlines a specification for multilateral interconnections at Internet Exchange Points (IXPs). Multilateral interconnection is a method of exchanging routing information among three or more External BGP (EBGP) speakers using a single intermediate broker system@ referred to as a route server. Route servers are typically used on shared access media networks@ such as IXPs@ to facilitate simplified interconnection among multiple Internet routers.
RFC 7947-2016 history
2016RFC 7947-2016 Internet Exchange BGP Route Server