On Mon, 31 Jan 2005, william(at)elan.net wrote:
On Mon, 31 Jan 2005, Christopher L. Morrow wrote:
Well, long as-path of 100 is certain to be invalid (result of misconfig if
just curious, why would it be invalid?
Its invalid in practice. You can build network with as-path larger then 100 in your lab, but in real world, we do not have this.
Of course you might say that its possible that we have less then 100 networks and each one is prepending several of their own as# and real number of networks is something like 20, but even that is too many and each network as-prepending 5 of their own AS is also rather unlikely.
so, 'dumb' but not 'invalid'... There might very well be networks (say not on the internet) where as-paths longer than 100 might be required. Saying: "they are invalid" isn't correct. Saying: "The use of as-path longer than 100 on today's Internet isn't helpful" is correct, or so say you and atleast blaine.