Also, There is no need for "multihost = true" when using with IPv6...
Why? Because "Multihost = true" turns on a NAT table (MASQUERADE I think) within each compute node... Effectively hiding its running Instances and acting as its default gateway but... Let IPv6 do the job without NAT... =P NOTE: Please, let me know if my above statement is wrong... I like to hear criticism, I have no problem with that... Long life to OpenStack! Cheers! Thiago On 8 August 2013 16:51, Martinx - ジェームズ <thiagocmarti...@gmail.com> wrote: > Guys, > > I'm designing my Cloud Computing still based on IPv4 but, I already > started to think on IPv6 every single day... > > So, I'm figuring out that, when we have OpenStack working 100% with IPv6, > we'll not need the following features: > > > With IPv6, there is no need for: > > > 1- NAT; > > 2- Floating IPs; > > 3- Use of Namespaces. > > > But, why?! > > > 1- There is no NAT for IPv6 (since NAT was a hack / workaround to deal > with IPv4 exhaustion); Here in Brazil, we call NAT tables a huge > "gambiarra" (the worse thing of the old IPv4 networks, which the IPv6 > gracefully addresses it)... > > 2- Floating IPs are also NAT rules, no need for it; > > 3- Namespaces are used mostly to allow tenants to share the same IPv4 > invalid subnet, for example, tenant A have 192.168.1.0/24 and also tenant > B can have another 192.168.1.0/24 that will not conflict at the Network > Node, because of the Namespaces there but, who needs this when dealing only > with IPv6?! No one. > > > Look, this OpenStack approach of presenting Linux Namespaces as tenant > routers, is AWESOME! It is a pretty good idea! I really like it but, it > will be entirely optional when using with IPv6, since the Global Public > IPv6 will never enter in conflict with each other "by its very nature"... > > I'm here saying this because I really want to see a single OpenStack > option to completely disable "Floating IPs and NAT rules", like "Namespaces > options" have its "allow_overlapping_ips = False / use_namespaces = False". > > I think that OpenStack should provides something like this: > "use_floating_ips = False / use_nat = False" to disable it. > > What do you guys think?! > > Cheers! > Thiago >
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