# IPv6 network setup

**URL:** <https://forum.opennebula.io/t/ipv6-network-setup/3214>\
**Category:** Product Support\
**Created:** [November 1, 2016, 1:03pm UTC](https://forum.opennebula.io/t/ipv6-network-setup/3214 "2016-11-01T13:03:00Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![UAnton](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/uanton/32/6309_2.png) [@UAnton](https://forum.opennebula.io/u/UAnton)\
**Post date:** [November 1, 2016, 1:03pm UTC](https://forum.opennebula.io/t/ipv6-network-setup/3214/1 "2016-11-01T13:03:00Z")

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Hi! I try to setup IPv6 network in Opennebula. Have probkem with [VirtualNetworkAllocate] Wrong format for IP6 global address prefix. I set “/64” and “64” what I do wrong?  
Thanks!

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**Author:** ![mcabrerizo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/mcabrerizo/32/4829_2.png) [@mcabrerizo](https://forum.opennebula.io/u/mcabrerizo)\
**Post date:** [November 1, 2016, 1:17pm UTC](https://forum.opennebula.io/t/ipv6-network-setup/3214/2 "2016-11-01T13:17:58Z")

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Hi Anton,  
I’m not sure but reviewing some examples I think that OpenNebula would be expecting an IPv6 global prefix in a form like this: 2004:A128::32. 64 or /64 are not possible values.

Hope it helps!

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**Author:** ![UAnton](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/uanton/32/6309_2.png) [@UAnton](https://forum.opennebula.io/u/UAnton)\
**Post date:** [November 1, 2016, 1:20pm UTC](https://forum.opennebula.io/t/ipv6-network-setup/3214/3 "2016-11-01T13:20:30Z")

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Thanks! I think I need read more manuals, but I don’t understand what Opennebula mean - GLOBAL\_PREFIX - A /64 globally routable prefix. I can’t find any GLOBAL\_PREFIX in IPv6 manuals.

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**Author:** ![mcabrerizo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/mcabrerizo/32/4829_2.png) [@mcabrerizo](https://forum.opennebula.io/u/mcabrerizo)\
**Post date:** [November 1, 2016, 1:41pm UTC](https://forum.opennebula.io/t/ipv6-network-setup/3214/4 "2016-11-01T13:41:07Z")

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Hi Anton!  
Yes you’re right the “A /64 globally routable prefix” may not be self explanatory. Have a look at [[Solved] Help setting up an ipv6 virtual network](https://forum.opennebula.io/t/solved-help-setting-up-an-ipv6-virtual-network/2934) maybe you can use it to configure your IPv6 network.

We can try to find what works and edit the documentation in GitHub so it’s clearer for new users!

Cheers!

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**Author:** ![vynt-kenshiro](https://avatars.discourse-cdn.com/v4/letter/v/5fc32e/32.png) [@vynt-kenshiro](https://forum.opennebula.io/u/vynt-kenshiro)\
**Post date:** [November 17, 2016, 8:45am UTC](https://forum.opennebula.io/t/ipv6-network-setup/3214/5 "2016-11-17T08:45:51Z")

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Hi UAnton,

Cloud you share your network configure for IPv6? I think I have the same issue. I have a range IPv6 2401:5f80:5001:1::/64 and I want to assign it to VM, example 2401:5f80:5001:1::1, 2401:5f80:5001:1::E. But when I assign 2401:5f80:5001:1:: to GLOBAL\_PREFIX and size set to 32, I got IPv6 with format prefix+fe:ff+… (IPv6 EUI-64 bit address).

Thanks,

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<div class="post-metadata">

**Author:** ![UAnton](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/uanton/32/6309_2.png) [@UAnton](https://forum.opennebula.io/u/UAnton)\
**Post date:** [November 17, 2016, 8:57am UTC](https://forum.opennebula.io/t/ipv6-network-setup/3214/6 "2016-11-17T08:57:12Z")

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> [@vynt-kenshiro](#):
>
> Cloud you share your network configure for IPv6? I think I have the same issue. I have a range IPv6 2401:5f80:5001:1::/64 and I want to assign it to VM, example 2401:5f80:5001:1::1, 2401:5f80:5001:1::E. But when I assign 2401:5f80:5001:1:: to GLOBAL\_PREFIX and size set to 32, I got IPv6 with format prefix+fe:ff+… (IPv6 EUI-64 bit address).

ipv6 address (128Bit) = provider /64 network (64 bit) + generated from MAC (64 bit)

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**Author:** ![vynt-kenshiro](https://avatars.discourse-cdn.com/v4/letter/v/5fc32e/32.png) [@vynt-kenshiro](https://forum.opennebula.io/u/vynt-kenshiro)\
**Post date:** [November 17, 2016, 9:23am UTC](https://forum.opennebula.io/t/ipv6-network-setup/3214/7 "2016-11-17T09:23:42Z")

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Thank you for your hint. Our ISP don’t allow IPV6 AUTOCONF and only allow static IPv6, example 2401:5f80:5001:1::1. I will check again with our ISP.