BGP ORIGIN Attribute Manipulation and Impact
📘 Cloudflare examines the BGP ORIGIN attribute, a mandatory path attribute intended to signal how a route was injected into BGP. Their experiments show widespread modification of ORIGIN values—predominantly to IGP—by many networks, including Tier-1s, altering route selection and diverting traffic for commercial advantage. The report describes methodology, measurements across IPv4/IPv6, and the resulting routing and economic impacts.