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Address order: sequential, reverse or random, per subnet and pool

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- Which never-used pool address a new client gets: sequential (the
  lowest, as before), reverse or random, in the settings, a subnet or
  a single pool (FIRST-LAST:ORDER). When no never-used address is left,
  the one free the longest, whatever the order; returning clients keep
  theirs.
- A subnet's pools are used in the order listed, or one at random
  weighted by its never-used addresses. Pools now keep the order they
  are given in (no more sorting by address).
- CLI --address-order and --pool-order; --add-pool of an existing range
  changes its order in place. Web UI: per-pool order and a move-up
  button, pool and address order on the subnet and settings pages.
- Kea's allocator: random is imported. Schema migration 5.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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abrown38andClaude Opus 5.5 committed 2026-10-18 18:13:25 +01:00
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docs/cli.md
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@@ -62,8 +62,8 @@ since the start, and problems.
|---|---|
| `subnet list` | subnets, with interface, pools, use, reservations, lease time |
| `subnet show SUBNET` | one subnet; SUBNET is its ID, name or prefix |
| `subnet add PREFIX --interface IFACE [--name N] [--pool A-B]... [--lease-time 12h] [--option NAME=VALUE]... [--comment C]` | add one |
| `subnet update SUBNET [--name] [--interface] [--prefix] [--pool]... [--add-pool] [--remove-pool] [--lease-time 1h\|default] [--option NAME=VALUE]... [--unset-option NAME]... [--comment]` | change what is given |
| `subnet add PREFIX --interface IFACE [--name N] [--pool A-B[:ORDER]]... [--pool-order listed\|random] [--address-order sequential\|reverse\|random] [--lease-time 12h] [--option NAME=VALUE]... [--comment C]` | add one |
| `subnet update SUBNET [--name] [--interface] [--prefix] [--pool]... [--add-pool] [--remove-pool] [--pool-order] [--address-order ...\|default] [--lease-time 1h\|default] [--option NAME=VALUE]... [--unset-option NAME]... [--comment]` | change what is given; `--add-pool` of a pool it has changes that pool's order ([subnets.md](subnets.md#address-order)) |
| `subnet enable\|disable SUBNET` | answer its clients, or not |
| `subnet delete SUBNET [-y]` | delete it and its reservations |
@@ -115,7 +115,7 @@ sent.
| Command | |
|---|---|
| `settings show` | |
| `settings set [--lease-time 1d] [--ping-check on\|off] [--ping-timeout 500ms] [--decline-hold 24h] [--authoritative on\|off] [--option NAME=VALUE]... [--unset-option NAME]...` | |
| `settings set [--lease-time 1d] [--ping-check on\|off] [--ping-timeout 500ms] [--decline-hold 24h] [--authoritative on\|off] [--address-order sequential\|reverse\|random] [--option NAME=VALUE]... [--unset-option NAME]...` | |
| `option list` | the options Steward knows ([options.md](options.md)) |
| `interface list` | the server's interfaces, their addresses and subnets (not those in `interfaces.exclude`) |