D-134 AMENDMENT (2026-07-29) is the authority.

Question as presented: the D-104 controller VM auto-enlisted into MAAS, but
D-134's bands cover no such node -- .4-.49 utility, .50-.99 VIP, .100-.200
NODES split into three OpenStack ROLE sub-bands, none of which a Juju
controller is. A measured occupancy table was put to the operator (dc0
metal-admin has only NINE allocated addresses; .1 held by nothing, .2 rack
leg, .3 D-131 forwarder, .4 mirror/proxy, .5-.49 free and RESERVED in MAAS)
with three options: .5 in the utility band, .103 in the control band, or a
new named sub-band.

Operator answer, exact utterance: "Rule .5 for the juju controller, with the
other utility nodes. These assignments will follow all DC deployments to make
sure standardized configuration is upheld through multiple datacenter stand
ups."

(1) <dc>-juju-01 takes octet .5 on every plane, inside the reserved utility
band so MAAS never auto-allocates there. This resolves the node-vs-utility
tension in favour of FUNCTION: the utility band is now the band for per-DC
INFRASTRUCTURE the OpenStack nodes consume, host-level or MAAS-managed alike.
.100-.200 stays for OpenStack ROLE nodes.

(2) The load-bearing half: the octet map is a STANDING CROSS-DC STANDARD, not
a per-DC choice. Every DC's juju-01 is .5, artifact service .4, rack leg .2,
forwarder .3. A new per-DC infrastructure service takes the next free utility
octet AND THE SAME ONE IN EVERY DC. Divergence between DCs at the same octet
is a DEFECT, not a local decision -- which is what makes dc-plane-ipam.sh
check meaningful across sites rather than merely per-site. Roosevelt analog:
the map transfers, not just the method.

Scope: this assigns the octet and sets the standing rule. It does NOT create
the MAAS record, the juju-controller-<dc> tag, or the tofu MAC pin -- all
still gated. The controller cannot be commissioned yet: power_type measured
EMPTY at enlistment, the same state that blocked all nine role nodes on
2026-07-20.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf