On Thu, Apr 10, 2014 at 1:30 PM, Gert Doering <gert@space.net> wrote:Highly so. Depending on which vendor you used, "typical" gear deployed
about 5-7 years ago had a hard limit at 256.000 routes - and that came quite close for a number of ISPs. The hardware upgrade to support 1 million routes did cost significant money (like, 10.000-50.000 EUR/router), and it does not truly support "1 million IPv4" routes, if you also have IPv6 and MPLS in your network - more like 700.000 IPv4 routes in typical deployments. Now, before the big discussion starts: there is other gear in the market that scales up to 2 million, etc., but I wanted to point out that these are real-world hard limits, and the amount of "headroom" we have between "what is out there today" (500k) and "what some of the fairly widely deployed core routers can do today" (700k) is not so big that we want to risk an explosion by factor 2.
Ah, that was worse than I thought it was, by far. Thanks for the clarification! -- Jan