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Re: Number of BGP routes a large ISP sees in total

  • From: Patrick W. Gilmore
  • Date: Wed Apr 18 11:25:03 2007

On Apr 18, 2007, at 2:43 AM, Mikael Abrahamsson wrote:
On Tue, 17 Apr 2007, Yi Wang wrote:

sense about the average (e.g., about 5? 10? 20?), as for a "large" ISP.

Well, if you're interconnecting with other large ISPs in 5 places then you'll get each prefix at least 5 times. Having 5 eBGP sessions between two ASes is quite common if both are large ISPs. So yes, I'd say that between 5-10 is quite common.

At least 5, and more than 10 for many prefixes, inside very, very large networks.