nanog mailing list archives

Re: IPv6 Unique Local Addresses


From: Owen DeLong <owen () delong com>
Date: Fri, 2 Mar 2018 23:02:16 -0800


On Mar 2, 2018, at 10:38 PM, Matt Harris <matt () netfire net> wrote:

On Sat, Mar 3, 2018 at 12:33 AM, Owen DeLong <owen () delong com <mailto:owen () delong com>> wrote:
Sure… You have to maintain the tunnel or they may reassign/reallocate the address. Here’s the reality of that, 
however:

1.    Unless you care about reaching the customer they reassigned it to from your network, you don’t care.
2.    Using it for ULA in addition to the tunnel isn’t really prohibited by that. It’s a gray area, I’ll admit.
3.    Sure, they can cancel the service at any time, but you get what you pay for. It saves you $100/year
      while it lasts.

Owen

I'm not sure where you're getting the $100 figure from, ARIN's minimum fee for an allocation is $250/year (for a /40 
or smaller block) on top of membership fees of $500/yr, so that's $750/yr to get a /48 from the North American RIR 
(which is the only one I'm looking at today given that the context is the nanog list).  Additionally, tunnel 
providers can and have shut down permanently at random - SixXS was among the largest providers, and they shut down 
operations entirely last year.  So any folks using space from them had to renumber, either on to another tunnel 
provider's space, or to ULA.  Re-numbering has associated costs, which in the case we're pointing to here, could've 
been saved had they deployed on ULA space instead.  


You don’t need an allocation. Get an assignment.

Owen


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