Hello, we discovered, that at least Hurricane Electric (HE, AS 6939) does rewrite BGP origin attribute unconditionally in all routes traversing their network. This mandatory, but probably not widely known/used attribute should not be changed by any speaker except originating router (RFC 4271, section 5.1.1). HE rewrites origin for all routes. I tried communicate this issue with HE, but they're not willing change their configuration and respect mentioned RFC document, and they're claiming, that another networks (Level3 was mentioned exactly) does similar thing. In my experience, there're not so many service providers doing that. What's your view on this, do you think, that service providers can simply ignore existing RFCs? With regards, Daniel