Rate of growth on IPv6 not fast enough?

Simon Perreault simon.perreault at viagenie.ca
Mon Apr 19 13:06:31 CDT 2010

On 2010-04-19 13:22, Bryan Fields wrote:
> If we look a the total number of translations for 250k users we see 10.5M
> entries.  As TCP/UDP only has 65,536 ports and about 1025 of them are
> unusable, this leaves 64,511 ports to work with per IP.  Divided out we need
> 163 public IP's min just to nat the number of users on a single PDSN pool,
> assuming we have a 1/2 loading thats 326 public IP's for one pool.

This is true only if you use endpoint-independent mapping. With 
address-dependent mapping (e.g. pf) or address- and port-dependent 
mapping (e.g. Linux) scaling is much better.

NAT64/DNS64 open-source --> http://ecdysis.viagenie.ca
STUN/TURN server        --> http://numb.viagenie.ca
vCard 4.0               --> http://www.vcarddav.org

More information about the NANOG mailing list