On Mon, Dec 18, 2017 at 01:04:03PM +0000, Nick Hilliard wrote: > It's also common practice for transit providers to use a single ASN > spanning the globe e.g. 174, 2914, 3356, etc. What you're describing > here is an aspect of the fact that that as-pathlen has not been a useful > determinant for the bgp decision engine for many years.
While somewhat orthogonal to this discussion, path length (and thus prepending) is about the only useful knob many BGP speakers have to try to bias incoming traffic. I suspect you mean something a bit different above. > Updating rfc4271 would be more productive - and getting IXPs to filter > ingress bgp feeds by default. I hope to be retired before that level of "incremental update" is expected to work in the Internet at large. :-) -- Jeff P.S. many providers provide knobs to ignore path length as a consideration. No spec work is required. _______________________________________________ GROW mailing list [email protected] https://www.ietf.org/mailman/listinfo/grow
