BGP ORIGIN attribute manipulation and its impact on the Internet
Summary
Cloudflare's blog analyzes how the BGP ORIGIN attribute can be rewritten by some networks to influence route selection. The piece describes experiments using IPv4 and IPv6 prefixes, shows that many observed paths carry different ORIGIN values than those set by the origin ASN, and discusses the traffic and revenue implications of this practice. It concludes with a call for deprecating or scrubbing the ORIGIN attribute to restore fairness in Internet routing.