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List:       inet-access
Subject:    RE[2]: netblock question
From:       "W.D.McKinney" <deem () wdm ! com>
Date:       2000-06-30 15:11:11
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Thanks, yes this is a customer who has a single downstream and now wants
to use our service for his bandwidth, but just doesn't want re-number.
I'll find out how big the block is and if it's portable, etc.

James Fischer <jfischer@supercollider.com> wrote:
> 
> This MIGHT be possible, but may not be worth the trouble.
> 
>   If the customer is using an address block that truly is "his
>   former provider's addresses", the stumbling block would likely
>   be the former provider, who would want to re-use the address
>   block.
> 
>   The next level of stumble would be with the former ISP's
>   wholesale provider, since the address block in question
>   is likely not portable between wholesale providers, either.
> 
> Everyone is very jealous about their IP space, and the
> larger the block, the less willing people are to carve off
> small chunks.  ARIN issues portable address space, 
> not providers.
> 
> Better to run some NAT translation on the customer's router
> so that they can re-number their machines at their leisure,
> but they will most likely be forced to renumber.
> 
> Of course, if the customer were dual homed, this would mean 
> that the customer could announce routes to address blocks
> over each of two provider links without concern as to who's
> address space "belonged" to who, so it is clear that there
> is no TECHNICAL barrier to announcing any route via any
> twisted maze one wishes.  :)
> -
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