Linked in https://mdlayher.com/blog/corerad-a-new-ipv6-router-advertisement-daemon/, don't delete!

corerad.toml

# CoreRAD v0.2.4 (BETA) configuration file.

[debug]
address = ":9430"
prometheus = true
pprof = true

[[interfaces]]
name = "enp2s0"
advertise = true
other_config = true
preference = "high"

  [[interfaces.prefix]]
  prefix = "::/64"

  [[interfaces.rdnss]]
  servers = ["fd9e:1a04:f01d::1"]

  [[interfaces.dnssl]]
  domain_names = ["lan.servnerr.com"]

[[interfaces]]
name = "guest0"
advertise = true
other_config = true

  [[interfaces.prefix]]
  prefix = "::/64"

  [[interfaces.rdnss]]
  servers = ["fd9e:1a04:f01d:9::1"]

[[interfaces]]
name = "iot0"
advertise = true
other_config = true

  [[interfaces.prefix]]
  prefix = "::/64"

  [[interfaces.rdnss]]
  servers = ["fd9e:1a04:f01d:66::1"]

[[interfaces]]
name = "lab0"
advertise = true
other_config = true

  [[interfaces.prefix]]
  prefix = "::/64"

  [[interfaces.rdnss]]
  servers = ["fd9e:1a04:f01d:2::1"]