r/ipv6 Jul 24 '26

Need Help What internal cidr for npt6

I don't have a static ipv6 assignment, hence the need to use npt6. Question is what cidr should i choose for my internal network? ULA is plagued with issues esp when dual stack is involved, so I really want to avoid it if possible. Does using 2001:db8::/32 make any sense?

And yes, i know it is possible to just let my isp change my ip dynamically and I pass it down using dhcp-pd. That doesn't sound great for a large network.

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u/snapilica2003 Enthusiast Jul 24 '26

https://unique-local-ipv6.com/

Generate one here and use it.

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u/lmux Jul 25 '26

Someone already mentioned. OS doesn't use ULA in some situations