nanog mailing list archives
Re: how many BGP routers, how many ASes
From: William Herrin <herrin-nanog () dirtside com>
Date: Wed, 13 May 2009 13:46:29 -0400
On Wed, May 13, 2009 at 11:53 AM, Irfan Zakiuddin <irfan.zakiuddin () googlemail com> wrote:
What I want to know is roughly how many : 1. ASes there are in the world today?
Hi Irfan, A little over 31,000. See http://www.cidr-report.org/as2.0/
2. BGP routers there are, for intra-domain as well as inter-domain routing, in total in the world?
I know of no authoritative source for this information. I used 150k for my estimate when I prepared http://bill.herrin.us/network/bgpcost.html last year; that fell more or less in the middle of the educated guesses I got here on nanog and in the other places I asked. 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.
3. BGP routers do the largest ASes have?
Decide what you mean by largest, identify which AS that is on the CIDR report and then go ask them.
Really interesting would then be to say either how fast the above numbers are growing, or to give estimates for what the answers to 1-3 will be in 5 years time.
http://www.potaroo.net/tools/asn32/ Figure 7 offers a handy graph from which you should be able to project a trend. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- how many BGP routers, how many ASes Irfan Zakiuddin (May 13)
- RE: how many BGP routers, how many ASes John Stuppi (jstuppi) (May 13)
- Re: how many BGP routers, how many ASes Patrick W. Gilmore (May 13)
- Re: how many BGP routers, how many ASes Ray Sanders (May 13)
- Re: how many BGP routers, how many ASes Valdis . Kletnieks (May 13)
- Re: how many BGP routers, how many ASes William Herrin (May 13)
- Re: how many BGP routers, how many ASes Nathan Ward (May 13)
- Re: how many BGP routers, how many ASes Ricardo Oliveira (May 13)
- Re: how many BGP routers, how many ASes jamie rishaw (May 13)