On Mon, Jun 1, 2015 at 5:13 PM, Baldur Norddahl <baldur.nordd...@gmail.com> wrote: > This is only a problem if you use so called tier 1 transit providers. > > The smaller fish in the pond have multiple transits themselves and will > there by always have an alternative route available.
Hi Baldur, Cogent is not a tier 1 (not a "transit-free") provider last I heard. Maybe that's changed, but they weren't back when they had the week-long peering dispute with Sprint. Their business plan included preventing their routes from reaching Sprint via paid transit. If you were a customer of either carrier that week and you weren't multihomed with full routes, you were not a happy camper. "Always" is such a strong. Yes, you're at higher risk if all your upstreams are "transit-free" but using only backbone providers who have paid upstream transit in their mix is no panacea. Regards, Bill Herrin -- William Herrin ................ her...@dirtside.com b...@herrin.us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
