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Thread: IPv6

  1. #1
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    IPv6

    Internet protocol version 4 (IPv4) is the protocol used
    by most of the hardware connected to the Internet.
    Because the new Internet addresses that IPv4 can handle
    are nearly used up, IPv6 was introduced several years ago
    to replace it.

    But so far almost everything runs on IPv4.

    Is there any good reason for my computer to have IPv6
    turned on right now?

    Is there any good reason for my computer to have IPv6
    turned off right now?

    -- Jeff, in Minneapolis
    http://www.FreeMars.org/jeff/

    "I find astronomy very interesting, but I wouldn't if I thought we
    were just going to sit here and look." -- "Van Rijn"

    "The other planets? Well, they just happen to be there, but the
    point of rockets is to explore them!" -- Kai Yeves

  2. #2
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    We don't use it on any of the networks we install, it's always turned off.
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  3. #3
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    NAT'ing sidestepped the short term problem of IPv4 numbers running out, so for now it'll be safe for you to disable it.,

    It didn't solve the long term problem, which as I understand it has resulted in China turning almost exclusively IPv6, but as the IPv6 was designed to coexist with IPv4 you probably don't have to care about that for the immediate future.
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  4. #4
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    Unless your ISP has implemented IPv6 and has migrated its user base to it there's no need to have it enabled.

  5. #5
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    IPv6 can coexist with IPv4, but it is not backward compatible. You cannot communicate with IPv6 machine using IPv4 machine. However, service providers host the services in both IPv6 and IPv4 space, and will continue to do so at least for next 3-5 years, to ensure that users in both the address spaces can connect without any issue. Its not time yet for the user machines to move to IPv6 now. And the migration is not that difficult. When the time comes, all you will have to do is enable IPv6, and your OS and your service provider will take care of the rest. Most of the common apps are already IPv6 ready.

  6. #6
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    Thank you. Your replies are exactly what I needed.

    IPv6 is enabled by default in Windows 7 and IE 8, which
    I'm using at the moment. I turned it off the other day
    after I noticed that, thinking it might possibly eliminate
    some delays in making connections, when an IPv6 connect
    is attempted but fails. I haven't been able to tell.

    -- Jeff, in Minneapolis
    http://www.FreeMars.org/jeff/

    "I find astronomy very interesting, but I wouldn't if I thought we
    were just going to sit here and look." -- "Van Rijn"

    "The other planets? Well, they just happen to be there, but the
    point of rockets is to explore them!" -- Kai Yeves

  7. #7
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    There can be other reasons to use IPv6, but I think it's a safe bet that if those reasons would apply to you, you would already be aware. For example, I know of some news servers that offer(ed) free access through their IPv6 interfaces: they say it's to test their setup under a real load, but it may be for marketing reasons too.
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  8. #8
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    Quote Originally Posted by shriram View Post
    IPv6 can coexist with IPv4, but it is not backward compatible. You cannot communicate with IPv6 machine using IPv4 machine.
    There are routing and encapsulation protocols to allow interconnection, they were part of the design of IPv6 exactly to prevent a bifurcation of the internet into two separate entities.
    __________________________________________________
    Reductionist and proud of it.

    Being ignorant is not so much a shame, as being unwilling to learn. Benjamin Franklin
    Chase after the truth like all hell and you'll free yourself, even though you never touch its coat tails. Clarence Darrow
    A person who won't read has no advantage over one who can't read. Mark Twain

  9. #9
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    The best reason not to enable IPv6.

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