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https://issues.apache.org/jira/browse/CLOUDSTACK-452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492435#comment-13492435
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Marcus Sorensen commented on CLOUDSTACK-452:
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+1. I almost want to say that supporting instances/routing VMs is more
important than hosts/management servers/system vms, since they're more likely
to be public.
> IPv6 support
> ------------
>
> Key: CLOUDSTACK-452
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-452
> Project: CloudStack
> Issue Type: New Feature
> Reporter: Wido den Hollander
>
> This is quite a large feature, but we are lacking complete IPv6 support at
> this moment.
> We should support IPv6 for:
> - The Management server itself
> - Communication with the Hypervisors
> - Communication with the System VMs
> Those three are probably the easiest work, we also need to support IPv6 for
> instances.
> In both the Advanced and Basic zone Instances should be able to get a non-NAT
> true and native IPv6 address.
> We should also not limit them to having one IP, they should be able to get
> multiple IPv6 addresses.
> In the basic zone it can be done pretty easily by having the Virtual Router
> also hand out IPv6 over DHCPv6 and have your router in the network handle the
> gateway work.
> In the advanced zone it becomes more difficult.
> One way could be that the network admin creates a static route for a /48
> towards a Virtual Router and then the VR can hand out /64s to Instances.
> But static routing can become a problem, so you might want to use OSPF, LISP
> or even iBGP for getting those prefixes to the VR.
> This is a big feature, but I think the Basic zone is the easiest for now.
> In the Advanced Zone you COULD keep everything behind the VR IPv4 and have
> the VR do IPv6 loadbalancing, but that would still not be true IPv6
> connectivity.
> NAT in the VR seems like a firewall, but a true statefull firewall in the VR
> could do the same while the Instances still have publicly routeable IPv6
> addresses.
> There is no functional spec on this yet, but we have to keep this in mind
> that we need IPv6 support. People are running out of IPv4 space.
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