IPv6 Default Allocation - What size allocation are you giving out

Thu Oct 9 07:15:46 UTC 2014

Stop cringing and give them /48s.

It’s really not going to harm anything. Really. Look at the math.

That scale of waste is a very very pale glimmer compared to the LAN side of things where you have 18,000,000,000,000,000,000 (and then some) addresses left over after you put a few hundred thousand hosts on the segment.

Also, claiming that 90% will never have more than 2 or 3 subnets simply displays a complete lack of imagination. Household networks will continue to gain sophistication and with automated topologies developed through more advanced applications of DHCP-PD, you will, in fact, start seeing things like WLAN+GuestWLAN+LAN on separate segments, entertainment systems which generate their own segment(s), appliance networks which have separate routed segments, etc.

Unfortunately, most of these future applications don’t stand a chance while we’re still mired in IPv4 and IPv4-think about how to allocate addresses.

Owen

On Oct 8, 2014, at 6:18 PM, Erik Sundberg <ESundberg at nitelusa.com> wrote:

> I am planning out our IPv6 deployment right now and I am trying to figure out our default allocation for customer LAN blocks. So what is everyone giving for a default LAN allocation for IPv6 Customers.  I guess the idea of handing a customer /56 (256 /64s) or  a /48 (65,536 /64s) just makes me cringe at the waste. Especially when you know 90% of customers will never have more than 2 or 3 subnets. As I see it the customer can always ask for more IPv6 Space.
> 
> /64
> /60
> /56
> /48
> 
> Small Customer?
> Medium Customer?
> Large Customer?
> 
> Thanks
> 
> Erik
> 
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