Le 22 août 2011 à 19:41, Cameron Byrne a écrit : > 2011/8/22 Nejc Škoberne <[email protected]>: >> Dear Cameron, >> >>> some pressure. IMHO, i believe that static over-subscription ratios >>> required by A+P will not meaningfully keep pace with the rapid growth >>> in the number of internet nodes. >> >> I would be very happy if you elaborated on this. Can you give something >> to support this belief? >> > > Easy math version assuming the entire internet moves to this model of > stateless address sharing: > > 50 Billion Internet nodes [1] > > 240 Million IPv4 addresses [2] > > 208.3 devices per IPv4 address -- by dividing the above numbers > > 312.5 ports per user -- by dividing by 65k ports
312 ports per host "for IPv4", while more and more sites are accessible in IPv6 and consume no IPv4 port, is in my understanding a comfortable perspective. Regards, RD > > Not a perfect guesstimate on several levels since the "internet" is > not uniform and does move to anything in a uniform, the numbers used > above are suspect, and this is not an internet wide solution, some > nodes may go IPv6 only, and so on ... but sometimes looking at numbers > like this in the macroscopic view helps us understand our little part > of the internet that we are trying to design a solution for. > > As stated, some providers may find a benefit here... I believe that is > clear. My understanding is that in North America many of the > incumbent land line providers have fairly static subscriber bases, not > a lot of growth in users demanding IPv4. In my world (mobile), AFAIK > approximately half of the service providers globally already do NAT44 > / LSN / CGN. > > Areas of the internet that are experiencing or anticipate rapid growth > (mobile, cloud, new ventures) in address consumption will likely not > extend their existing addresses far with a stateless solution. > > Regards, > Cameron > > [1] http://www.ericsson.com/thecompany/press/releases/2010/04/1403231 > [2] http://tools.ietf.org/html/rfc3194 > > >> Thanks, >> Nejc >> > _______________________________________________ > Softwires mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/softwires _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
