# A5 — Network Architecture

**Project:** Kingsford Hotel Bacolod — BMS
**Date:** 2026-04-28
**Source:** A-010 (isolated BMS LAN), A-025 (BACnet/IP backbone + MS/TP field), A4 panel schedule (8 panels per A4 helper output; logical grouping per A-024 = 14 controllers)
**Status:** draft

## Topology

Isolated BMS LAN with a single uplink to the customer corporate LAN at the BMS server room (Lower Ground IT/telecom room per A-006).

```mermaid
graph TD
  CUST[Customer LAN uplink<br/>1× single-mode fiber]
  CORE[Core Switch<br/>24-port managed L2/L3<br/>BMS server room — Lower Ground]
  SVR1[BMS Primary Server<br/>Dell PowerEdge R660]
  SVR2[BMS Standby Server<br/>Dell PowerEdge R660]
  WS1[Operator WS — Server Room]
  WS2[Operator WS — FM Office]
  GFX[Graphics PC + 55-inch display]

  CUST -.uplink.-> CORE
  CORE --- SVR1
  CORE --- SVR2
  CORE --- WS1
  CORE --- WS2
  CORE --- GFX

  CORE -- fiber backbone --> SW_LG[Edge Switch — Lower Ground]
  CORE -- fiber backbone --> SW_GF[Edge Switch — Ground / GF Mezz]
  CORE -- fiber backbone --> SW_2F[Edge Switch — 2nd Floor / Mezz]
  CORE -- fiber backbone --> SW_3F[Edge Switch — 3rd Floor]
  CORE -- fiber backbone --> SW_5F[Edge Switch — 5th Floor]
  CORE -- fiber backbone --> SW_69[Edge Switch — 6-9F typical]
  CORE -- fiber backbone --> SW_1011[Edge Switch — 10-11F typical]
  CORE -- fiber backbone --> SW_12[Edge Switch — 12th Floor]
  CORE -- fiber backbone --> SW_RD[Edge Switch — Roof Deck]

  SW_LG --- PNL_LG_CHILLER[BMS-PNL-LG-CHILLER<br/>Chiller plant]
  SW_LG --- PNL_LG_PLUMB[BMS-PNL-LG-PLUMB<br/>HW + boiler]
  SW_GF --- PNL_GF[BMS-PNL-GF<br/>GF + GFM]
  SW_2F --- PNL_2F[BMS-PNL-2F-CASINO<br/>Casino MVAC + 2F BOH]
  SW_3F --- PNL_3F[BMS-PNL-3F<br/>3rd amenity]
  SW_5F --- PNL_5F[BMS-PNL-5F]
  SW_69 --- PNL_6F[BMS-PNL-6F]
  SW_69 --- PNL_7F[BMS-PNL-7F]
  SW_69 --- PNL_8F[BMS-PNL-8F]
  SW_69 --- PNL_9F[BMS-PNL-9F]
  SW_1011 --- PNL_10F[BMS-PNL-10F]
  SW_1011 --- PNL_11F[BMS-PNL-11F]
  SW_12 --- PNL_12F[BMS-PNL-12F]
  SW_RD --- PNL_RD_CT[BMS-PNL-RD-CT<br/>Cooling towers]
  SW_RD --- PNL_RD_MECH[BMS-PNL-RD-MECH<br/>PAHU + HZ plumbing]
```

## Switch inventory

| Tag | Type | Ports | Location | Notes |
|-----|------|-------|----------|-------|
| SW-CORE | Managed L2/L3 | 24 + 4 SFP | Server room (LG IT) | Backbone aggregation |
| SW-LG | Managed L2 | 16 + 2 SFP | Lower Ground IT closet | Chiller + plumbing panels |
| SW-GF | Managed L2 | 8 + 2 SFP | Ground Floor electrical room | GF + GFM panel |
| SW-2F | Managed L2 | 16 + 2 SFP | 2nd Floor IT closet | Casino + BOH (high-density) |
| SW-3F | Managed L2 | 8 + 2 SFP | 3rd Floor electrical room | 3rd amenity |
| SW-5F | Managed L2 | 8 + 2 SFP | 5th Floor electrical room | 5F |
| SW-69 | Managed L2 | 16 + 2 SFP | 6F electrical riser | Stacked 6-9F (4 floors) |
| SW-1011 | Managed L2 | 8 + 2 SFP | 10F electrical riser | Stacked 10-11F |
| SW-12 | Managed L2 | 8 + 2 SFP | 12F electrical riser | 12F |
| SW-RD | Managed L2 | 16 + 2 SFP | Roof Deck mechanical IT | Roofdeck mech (CT + PAHU) |

## Backbone

- **Single-mode fiber 12-strand** from server-room core switch to each edge switch via electrical riser shaft
- Estimated length 380 m total per `A3-cable-spec-rules.yaml` trunk topology
- **MS/TP field bus** per floor segment — daisy-chain, max 30 nodes, 700 m total estimated

## Integration / uplinks

- **Customer LAN uplink** — single-mode fiber to customer's corporate IT room (1× connection); firewall-isolated. BMS LAN is otherwise air-gapped.
- **Hotel PMS integration** — out of base scope (A-007); offered as priced option (gateway + per-room mapping).
- **FDAS / CCTV / ACS / PA** — separate Aux contractor scope per ECE drawings; no integration in BMS scope.