Re: how many BGP routers, how many ASes

On 14/05/2009, at 5:46 AM, William Herrin wrote:

Figure every AS must have at least one BGP router, the vast majority will have at least two, many will have more than two, and at least some will have more than 100. Figure also that there are fewer BGP routers in use than there are prefixes in the table. Gives you a lower bound of around 70k and an upper bound around 290k.

How are you certain that there are fewer BGP routers than prefixes? At all my previous employers we have had more routers than prefixes we advertised to the global table (which is where you get your 290k number). -- Nathan Ward