[Unit]
Description=Reconcile WAN with VRRP mastership every 30s

[Timer]
# 30s: fast enough that a dropped transition is a blip rather than an outage,
# slow enough that it is never the thing generating load. It only commits when
# state actually disagrees, so a steady-state tick is two `ip` calls and a grep.
OnBootSec=60
OnUnitActiveSec=30
AccuracySec=5

[Install]
WantedBy=timers.target