> I suspect we all agree that crushing the routing system would be bad . > It seems like the question is what mechanism (other than ambiguity) > would be sufficient to prevent that happening.
Assuming we have the "SHOULD NOT be routed globally" in the spec. Then if the PI addresses come from a different space than the PA addresses I think there is a way out. When the routing gets strained ISPs can unilaterally decide to filter out PI routes (or have a different prefix length filter for the PI space than for the PA space). ISPs are unlikely to do this for the PI routes their direct customers are using, since it would upset their customers. But they should be able to do it for the PI routes coming from elsewhere. And the ISPs could do this type of filtering on the PI space from day one - "pay me money if you want me to carry your PI route" - on an individual ISP basis. Could this work? I think, but I'm not sure, that this assumes that we will have a scalable PI scheme some time in the future (presumably by separating PI identifiers from PA locators). Erik -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
