System Confederations for BGP , Obsolete – Capabilities Advertisement with BGP-4 , Obsolete – BGP Support for Four-octet AS Number Space See also 2021 Facebook outage AS 7007 incident Internet Assigned Numbers Authority Packet forwarding Private IP QPPB Regional Internet registry Route analytics Route filtering Routing Assets Database Notes References Further reading Chapter "Border Gateway Protocol (BGP)" in the Cisco "IOS Technology Handbook" External links BGP Routing Resources (includes a dedicated section on BGP & ISP Core Security) BGP table statistics Internet Standards Internet protocols Routing protocols Internet architecture