TID: FMail-W32 2.1.3.7-B20170919   
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   MSGID: 2:280/5555 61dee59e   
   REPLY: 2:5020/545 61dc5ddc   
   Hello Alexey,   
      
   On Monday January 10 2022 19:12, you wrote to me:   
      
    MvdV>> It is not that 2^64 addresses are not enough for all my   
    MvdV>> devices, it is that a /64 can not be divided into subnets.   
      
    AV> [Top-secret, burn before reading!]   
      
   Done. But thanks to the Fidoweb, I have a copy. ;-)   
      
    AV> And on my early experiments, when the /64 was the only block I had,   
    AV> that was really great.   
      
   Yes, now that you mention it, I remember yuo experimenting with dividing a /64   
   into 32 bit subnets.   
      
    MvdV>> That is the way it is designed. A /64 is the smallest subnet.   
      
    AV> No. The /64 is the default subnet size, and people normally SHOULD NOT   
    AV> (as in FTA-1006) split these blocks further, but that IS possible and   
    AV> NOT prohibited.   
      
   OK, so I stand corrected, it is possible.   
      
   But many things won't work any more. SLAAC comes to mind.   
      
   So one /should/ avoid it.   
      
   At first glance one would say: a /64? what a waste! But keep in mind that   
   "waste" is only a problem when there is a shortage. "Waste and shortage" is   
   IPv4 think.   
      
    MvdV>> So... if one wants/needs more than one subnet, one needs more   
    MvdV>> than one /64. That is the way it is. It should be no problem,   
    MvdV>> there is enough for everyone.   
      
    AV> Here in Russia the de-facto standard is one MAC-based IPv6 address for   
    AV> the outer-side link and /64 subnet routed via that address to the   
    AV> customer's LAN. Additional subnets may be requested as well, but ISP   
    AV> admins say most people don't request them.   
      
   So most people in Russia do not need more than one subnet....   
      
      
   Cheers, Michiel   
   --- GoldED+/W32-MSVC 1.1.5-b20170303   
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