Quote from: Monviech (Cedrik) on June 19, 2026, 02:05:23 PMYou should try with at least a reserved prefix range of 4.
Then 4x /64 are reserved, which results in a /62 prefix available for KEA. It will split this into two subnets. It will take the first /63 for the IA_NA pool, and for the IA_PD pool you will also have /63.
Thanks, that was a crucial tip.
For testing purposes, I've enabled IPv6 on only one interface for now, since I want to keep the addresses on that interface the same as before.
To do this, I entered the following in the interface settings: Assign prefix ID 0x17
Reserved prefix range 4.
When I then enter "Delegated Length 64" in the "Edit PD Pool" section, I get the following message again:
"Dynamic prefix '2a00:xxxx:xxxx:xx17::/64' is too small to create a non-overlapping PD pool; split prefix length would be '65'."
However, if I enter the following in the interface: Assign prefix ID 0x16
Reserved prefix range 4
it works.
Unfortunately, I don't understand where my mistake is right now... But I'd really like to keep the 17.
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