Subj : Giving out too generous IPv6 addresses
To   : Björn Felten
From : Markus Reschke
Date : Sun Aug 14 2016 17:14:42

Hello Björn!

Aug 14 16:59 2016, Björn Felten wrote to Markus Reschke:

 BF> Now, a /56 IPv6 range is far from enough to give every citizen on 
 BF> this planet it's individual IPv6 range. And a /64 range can only 
 BF> cover half of the Earth's population. So something like a /96 
 BF> individually and a /80 to each of the providers would probably be 
 BF> more realistic, no?

That's IPv4-thinking. There are some nice papers on IPv6 adressssing plans and management. One very important aspect is routing. With IPv4 we've got about 600k routes in a full BGP table at the moment. Scale that up by 32 bits and you'll see it's simply not feasable. Another point is the 64 bit interface ID. So it has to be a /64 for each LAN segment. And we'll have multiple LANs in SOHO environments soon (IoT and what have you). For WLAN you should already have a separate network. For a guest WLAN it's another network. So I'd consider 8 /64s the absolute minimum. 

Cheers,
Markus

--- 
 * Origin: *** theca tabellaria *** (2:240/1661)

.