IPv6 Advertisements

Azinger, Marla marla.azinger at frontiercorp.com
Tue May 29 17:12:23 UTC 2007

/48's handed out by ARIN are most likely in the PI range that ARIN has deamed for PI use only.  Networks are aware of the PI block and have opened their filters to let /48 or more specific through if and only if it comes from the special IP block.  That said...not everyone is letting more specific than a /32 through no matter what IP block it comes from.


-----Original Message-----
From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu]On Behalf Of
Donald Stahl
Sent: Tuesday, May 29, 2007 6:26 AM
To: Pekka Savola
Cc: nanog at nanog.org
Subject: Re: IPv6 Advertisements

> Anything more specific than /32 is going to be filtered at some portion of 
> the ISPs whether for the good or bad.  There are some subsets of the v6 
> address space that have a higher chance of /48 working (for some definition 
> of 'working') than other parts of the address space, though.
More specific advertisements always stand a chance of being blocked. I was 
more interested in whether or not people know of places where they are 
actively being blocked and why.

That said- ARIN is handing out /48's- should we be blocking validly 
assigned networks?


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