[address-policy-wg] Re: Assignments for Critical Infrastruction
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Stephane Bortzmeyer
bortzmeyer at nic.fr
Wed Oct 29 08:44:34 CET 2008
On Wed, Oct 29, 2008 at 10:40:37AM +0400, Marco Hogewoning <marcoh at marcoh.net> wrote a message of 23 lines which said: > isn't the whole idea of anycast that you create redundancy by adding > more machines/locations in the same address space ? Having one anycast cloud does provide redundancy and then protection against *some* problems, typically physical problems (power failures, fire) or dDOS. > So what exactly are you trying to gain by adding multiple anycast > blocks, that's not exactly clear with me. But anycast by itself does not protect you against problems with BGP/routing. If Pakistan Telecom announces one of your prefixes, or if a wrong/outdated bogon filter blocks it, anycast by itself won't help. Here, a second anycast cloud with a second prefix may help.
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