IPv6 address "incrementing"?

[CGGXANNX]

Pinning the subnet id is supported in 7.21. You only have to remember to not use the subnet id 0. See:

Experiences with ipv6?

You can specify the subnet id part since 7.21, no need to specify the full address. However there is one exception, that is the first subnet (the one with subnet id all zeros) cannot be specified that way, that one will be dynamic. You can read about this in the 7.21 threads. Example: ISP gives you /56 prefix, that you put in isp-pool, under /ipv6 address, you can assign hardcoded prefixes like this, together with from-pool=isp-pool: address=::1:xxxx:yyyy:zzzz:www address=::2:xxxx:yyyy:zzzz:w…

In your case, assign the /ipv6 address entries for your interfaces like this:

• 0:0:0:1::1/64 or ::1:0:0:0:1/64
• 0:0:0:2::1/64 or ::2:0:0:0:1/64
• ...
• 0:0:0:f::1/64 or ::f:0:0:0:1/64
• 0:0:0:10::1/64 or ::10:0:0:0:1/64
• 0:0:0:11::1/64 or ::11:0:0:0:1/64
• ...
• 0:0:0:fe::1/64 or ::fe:0:0:0:1/64
• 0:0:0:ff::1/64 or ::ff:0:0:0:1/64

Which means you assign 0000:0000:0000:00nm:xxxx:yyyy:zzzz:wwww with nm ≠ 00 and the subnet will not move. Just don't assign ::xxxx:yyyy:zzzz:wwww because the subnet-id will then be 00 and the assignment will be dynamic and jump around every time the DHCPv6 binding is renewed.