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List:       ietf
Subject:    Re: ULA-C (Was: Re: IPv6 will never fly: ARIN continues to kill it)
From:       Keith Moore <moore () cs ! utk ! edu>
Date:       2007-09-21 20:54:01
Message-ID: 46F42F69.7060505 () cs ! utk ! edu
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Hallam-Baker, Phillip wrote:
> Seems to me that what you are saying amounts to the statement that PI space cannot \
> exist by definition. If there is address space that is routable on an Internet-wide \
> basis it is by definition routable Internet space and no PI space. 
There can be such a thing as PI space that is treated differently than
PA space.  But anyone who thinks that having a PI prefix means that his
prefix advertisements will be accepted in perpetuity by every IPv6
network is deluded.  Sooner or later, you're going to have to pay
_somebody_ to get that prefix routed.  And the amount may well increase
over time, perhaps drastically.  And if you don't keep making those
payments you're not going to be reachable anymore. 

So you can pay your ISP for PA space (along with connectivity) or you
can pay somebody else (maybe many somebodys) for PI space in everyone's
routing table.  In either case you should design your network to be able
to renumber in case you want to change who you're doing business with,
or are forced to change your prefix.

Keith


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