REPLY: 2:280/5555 616a9a21   
   MSGID: 2:5005/49 616ab362   
   CHRS: CP866 2   
   TZUTC: 0700   
   TID: hpt/fbsd 1.9.0-cur 2019-12-05   
   Dear Michiel,   
      
   16 Oct 21 11:23, you wrote to me:   
      
    VS>> Those of you lucky to have a *native* IPv6 connection from your   
    VS>> ISP, could you please share what network topology your ISP   
    VS>> offers. E.g.   
      
    VS>> 3. A /64 for the link and a /56 for your devices   
      
    MV> I think #3 comes closest.   
      
   Thanks for replying.   
      
    MV> I am not sure about the /64 for the link. The only visible part of the   
    MV> link is the IPv6 WAN address of the router. It is outside the /56   
    MV> assigned to the user, the link may just use a /128.   
      
   Do you see the WAN address of the router in the `traceroute -6` output?   
      
    MV> The modem/router supplied by the ISP assigns one /64 for the LAN and   
    MV> another /64 for the guest network. More /64 out  of the /56 can be   
    MV> obtained by connecting extra routers.   
      
   Very little flexibility IMHO. Can you at least assign a static IPv6 address   
   within the LAN /64?   
      
    MV> For IPv6 one must use the modem/router from the provider. When the   
    MV> modem/router from the provider is set in bridge mode, the connection   
    MV> becomes IPv4 only.   
      
   This looks very similar to what I've heard from a Rostelecom representative.   
   This probably means that the IPv6 is not really "native" and there is some   
   kind of tunnel terminated at the provider-owned CPE.   
      
   Victor Sudakov, VAS4-RIPE, VAS47-RIPN   
   --- GoldED+/BSD 1.1.5-b20170303-b20170303   
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