Forum Discussion

dgcarter's avatar
dgcarter
Dialled in
15 years ago

IPv6 support on Virgin media

Does anyone know whether (and if so when) Virgin plan to implement IPv6 on its network?
17
TonyJr's avatar
TonyJr
Up to speed
14 years ago
Excellent - the ball has started rolling. I still hope that we can request a prefix higher than the /64 minimum e.g. /56 or /48.
legacy1's avatar
legacy1
Alessandro Volta
14 years ago
TonyJr wrote:
Excellent - the ball has started rolling. I still hope that we can request a prefix higher than the /64 minimum e.g. /56 or /48.

Do we really want to run out of IP's again? What you going to do with 18,446,744,073,709,551,616 addresses?

 

A Prefix length of /120 for 256 addresses (or less) of native IPv6 is enough. 

  • Anonymous's avatar
    Anonymous
    14 years ago
    i'd like 1024 addresses as thats what i ahve now on my internal network :)
    • karen_cookson's avatar
      karen_cookson
      Tuning in
      14 years ago

       

      It doesn't work like that with IPv6.  The network is based on the first 64 bits and the host on the last 64 bits.  Therefore if things are done correctly a /64 should be the minimum given.  If they are using stateless autoconfiguration then the host section address (last 64 bits) is based on the MAC address.

       

      Also note that there isn't NAT, so therefore a firewall is very important

      • Anonymous's avatar
        Anonymous
        14 years ago
        i know. no one will ever need more then /64. you can run a isp with /64 block
  • Dagger's avatar
    Dagger
    Tuning in
    14 years ago

    Please... no. In IPv6 you don't count "number of addresses", but "number of subnets (/64s)", and allocating one (or less than one) is ridiculously stingy.

     

    I don't think you guys have quite got your heads around just how much bigger 2^128 is compared to 2^32. In particular, there are 5000 /48s per person on the planet, just in 2000::/3. Each one of those /48s can service 65k networks, and the number of computers on each of those networks will be limited by factors other than the 2^64 addresses available for it.

     

    At 5000 per person on the planet, I do not believe we will run out of /48s, even if we allocate one to each ISP customer. However, even if we do, note that that's just out of 2000::/3 -- there are an additional five /3 blocks available, so even if we do somehow run out we can adjust our allocation policies and start over in 4000::/3. Allocating /48s today is not going to be a problem tomorrow.

    • Anonymous's avatar
      Anonymous
      14 years ago
      and then ipv6 was set up everyone that needed a ip could of had 10000's
      • legacy1's avatar
        legacy1
        Alessandro Volta
        14 years ago
        340,282,366,920,938,463,463,374,607,431,768,211,456 IPv6
        4,294,967,296 IPv4

        18,446,744,073,709,551,616 for a /64
        Times
        4,294,967,296
        =
        79,228,162,514,264,337,593,543,950,336

        340,282,366,920,938,463,463,374,607,431,768,211,456
        take
        79,228,162,514,264,337,593,543,950,336
        =
        So it fits in that big number if everyone had a /64 but really do you need that many like /96 is the size of the IPv4 now how many more IP's do you want?.