IPv6 Addressing Help

Owen DeLong owen at delong.com
Fri Aug 14 11:09:53 CDT 2009

On Aug 14, 2009, at 8:49 AM, David Freedman wrote:

> Chris Gotstein wrote:
>> I think we had to let ARIN know the time frame of deploying IPv6  
>> and how
>> many customers we expected to put on in the first couple years.  They
>> did not ask for an addressing scheme.
>> Reading over the RFC's and other IPv6 resources, we have decided to  
>> hand
>> out /56's to small/home/SOHO customers and /48's to larger customers.
>> I'm just not able to wrap my brain around the subnetting that needs  
>> to
>> be done on the router.  Like i said before, i think i'm just over
>> complicating it in my mind.
> Will keep it simple, this is what I (and I suspect many others) do
> /128 - Loopback (what else?)
> /126 - Router p2p
> /112 - Router LAN shared segments (p2mp)
> /64  - Single customer LAN segments (customers asking for basic IPv6)
> /56  - Customer wants multiple LANs, doesn't want to fill out
> justification form
> /48  - Customer wants multiple LANs, thinks /56 is too small (for some
> reason), needs for routing, wants rDNS delegation etc.etc.etc..
I'll point out that you can do rDNS delegation down to the /64 (or  
even the /124) level.

As to documenting, I think that the ARIN IPv6 wiki (http:// 
getipv6.info) might be an
excellent place to add such data.


More information about the NANOG mailing list