On Thursday 01 July 2010 12:20:09 am Seth Mattinen wrote: > Many providers will send prefixes longer than a /24 to > their customers but not out to their peers. I could > announce a /25 to Sprint, for example, but only other > Sprint customers will see it.
It is also not uncommon to permit /32 (v4) prefixes outward toward providers (inbound from customers) if they provide you with community-based blackholing capabilities. You just have to hope they have great internal routing policies that such prefixes don't end up beyond their domain. Cheers, Mark.
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