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Question about IPv6
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Question about IPv6

bcrlsnbcrlsn Member
edited May 2013 in General

Why do dedicated servers sometimes get assigned a /64?
That's a ton of IPv6 addresses, how could one possibly ever use that many?

Comments

  • GIANT_CRABGIANT_CRAB Member
    edited May 2013

    Companies in the past get IPv6 addresses for free but a few months ago, they've started charging for IPv6 addresses.

    Well, its free, so you get assigned that many.
    They want you to use them.

  • mnpeepmnpeep Member

    It's not necessarily about getting x amount of addresses more-so than it is planning and making a structured network with those addresses.

  • flyfly Member

    subnetting is better with /64's

  • StinyStiny Member
    edited May 2013

    Total IPv6 addresses 3.4028236692093846346337460743177e+38
    /64 block addresses 18,446,744,073,709,551,616
    We aren't running out anytime soon. With a dedicated server you may decide to host for other people, and in that case you would want as many addresses as possible.
    I doubt I would be able to use a /96 to its fullest.

  • bcrlsnbcrlsn Member

    I suppose, it just seems impossible to use 18,446,744,073,709,551,616 addresses.

  • @fly said: subnetting is better with /64's

    Mostly this.

  • bcrlsnbcrlsn Member

    @fly @concerto49 - Makes sense.

  • rm_rm_ IPv6 Advocate, Veteran
    edited May 2013

    So that this works, and you can have a network of VMs on that server, or route IPv6 over a VPN somewhere, and be able to use autoconfigured addresses there.

    Also for customer separation purposes even VPSes are ought to be assigned their own /64s, because spam RBLs and the like are going to ban per /64. Luckily some providers do have a clue and already assign subnets: http://www.lowendtalk.com/discussion/4552/leb-providers-with-an-ipv6-64-or-more/p1

  • DomainBopDomainBop Member
    edited May 2013

    Why do dedicated servers sometimes get assigned a /64?

    I wouldn't know. The last server I bought from serverbidding last night only had ONE IPv6 assigned :P

  • Isn't it part of the IPv6 standard that end user clients be assigned no less than a /64?

  • kbeeziekbeezie Member
    edited May 2013

    It's not really feasible for the providers to provide you with anything smaller than a /64 block. They can but far as native IPv6 networking goes, it's just far easier for them to provide a /64 (or in some cases a /48) block for you to use, even if you can never really use 18 quintillion addresses.

    Even tunnels (ie: HE Tunnels) are /64 or /48 but never smaller than that.

  • marcmmarcm Member

    @bcarlsonmedia Why do you care?

  • @Magiobiwan said: Isn't it part of the IPv6 standard that end user clients be assigned no less than a /64?

    Yeah. You need this for certain functions to work, like SLAAC.

    IPv6 is very different from IPv4. It wasn't designed like IPv4 to use every address in a subnet. It was designed to use subnets.

  • bcrlsnbcrlsn Member

    @marcm - I was just wondering. It makes very little sense to me to assign a single server a whole /64, I still haven't learned much about IPv6, I'm still gaining understanding of it.

  • rm_rm_ IPv6 Advocate, Veteran

    @bcarlsonmedia said: It makes very little sense to me to assign a single server a whole /64

    Even after all the explanations in this thread?

  • get tunnelbroker /48 if /64 not enough :D

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