[ppml] [address-policy-wg] Those pesky ULAs again

On May 30, 2007, at 4:33 AM, Per Heldal wrote:

> On Tue, 2007-05-29 at 12:08 -0700, David Williamson wrote:
>> I wasn't going to post again today to this list, but I cannot let
>> blatantly incorrect statements go by.  PI is not hard to get,  
>> although
>> your experience may vary by region.  My org holds a PI /48, and it
>> took me 2 days of duration and ten minutes of effort to receive it.
>> That's nearly trivial, in my book.
>
> If you want to endorse PI for "private" use please also consider  
> that it
> leaves blocks wide open to abuse. Separate ULA-C space can easily be
> filtered, but how do you easily prevent hijacking of unannounced
> PI-prefixes should such private blocks become as commonplace as
> rfc1918-space?

How do you prevent it now, in IPv4 ? (I know several companies with  
addressable blocks for
internal use, and so I suspect that this is not that rare.)

Regards
Marshall

>
> //per
>
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