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Expand LAN to 10.0.0.0/22 with static/reserved/dynamic/spare zones

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Splits the LAN into four /24 zones: 10.0.0.0/24 static (no DHCP, DNS
only), 10.0.1.0/24 fixed DHCP reservations by MAC, 10.0.2.0/24 dynamic
DHCP pool, 10.0.3.0/24 spare/unused. ipadm now derives the required
subnet from whether a host has a MAC, auto-assigns free IPs, and
auto-migrates a host's IP when its MAC is added/removed. Migrated the
existing archerc80 reservation from 10.0.0.2 to 10.0.1.2.

Also fixes a latent bug found while doing this: dnsmasq's SIGHUP
(`systemctl reload`) only re-reads /etc/hosts, not the conf-dir files
ipadm writes to, so config changes were silently not applied on
reload. ipadm now restarts dnsmasq instead.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
mike
2026-08-21 08:57:58 +02:00
co-authored by Claude Sonnet 5
parent 78beedeabc
commit c135f205fa
10 changed files with 364 additions and 112 deletions
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config/network-interfaces
+5 -2
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@@ -16,7 +16,10 @@ iface enp3s0 inet static
dns-nameservers 141.14.128.1
dns-search fhi.mpg.de
# LAN interface (Router/Gateway/DHCP/DNS für 10.0.0.0/24)
# LAN interface (Router/Gateway/DHCP/DNS für 10.0.0.0/22)
# Aufteilung: 10.0.0.0/24 statisch, 10.0.1.0/24 DHCP-Reservierungen (MAC),
# 10.0.2.0/24 dynamischer DHCP-Pool, 10.0.3.0/24 Reserve/unbenutzt.
# Details: siehe README.md im Router-Repo.
allow-hotplug enp7s0
iface enp7s0 inet static
address 10.0.0.1/24
address 10.0.0.1/22