On Jun 01, 2015, at 17:46 , William Herrin <bill@herrin.us> wrote:
On Mon, Jun 1, 2015 at 5:13 PM, Baldur Norddahl <baldur.norddahl@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.
Cogent has no transit. Hasn’t for years. During the peering outage, the only “transit” they had was to a single SFI network. I make no comments about Cogent’s reliability or peering or etc. — TTFN, patrick
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 ................ herrin@dirtside.com bill@herrin.us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>