---
title: "02 — Switch Configuration (Aruba JL253A)"
description: "## Purpose"
section: nanda
raw: "02-switch-configuration.md"
source: ai-generated
tags: network, aruba, siemens, vlan
last-updated: 2026-09-15
---

# 02 — Switch Configuration (Aruba JL253A)

> **Last updated:** 2026-09-05 | **Status:** ✅ Complete with MAC address mapping

## Purpose

Port-level documentation for the Aruba JL253A (2930F) switch based on configuration file `config1(2).pcc` and MAC address table from `Aruba-MAC-Address.txt`.

## Switch inventory

| Name | Model | PoE | # Ports | Location | Management IP | Notes |
|------|-------|-----|---------|----------|---------------|-------|
| LAN-SW | Aruba JL253A (2930F) | yes | 24 | Network rack | 192.168.28.240 (VLAN 28) | VLAN-aware, edge ports on all VLANs |

## Interface naming scheme

| Port | Aruba Name | Description |
|------|------------|-------------|
| 1 | Clacks / Omada OC200 | Primary uplink to Clarks router |
| 2 | AP / Errol (Passage) | IoT devices, passage lighting control |
| 3 | UNUSED | Spare port (VLAN 30 native) |
| 4 | Modem Management | Console/management access |
| 5 | Laolith (Music Room) | Music room device |
| 6-12 | Various | Specific devices or spares |
| 13 | Clacks / Leonard | Uplink to Clarks router/firewall |
| 14-22 | Various rooms | Lighting, control by room |
| 23 | Leonard | Secondary/router port 2 uplink |
| 24 | Ruby | User device or spare |
| ext-e 0/25 | — | SFP+ redundant uplink to router/firewall |
| ext-e 0/26 | Aruba Switch | Connected to Aruba JL253A (ring topology) |

## MAC Address Table Analysis - Device Count by VLAN and Port

## Active Device Connections (from Aruba MAC table)

**VLAN 27 - Guest Network (1 device):**   Port 26: D6ED0F-4C5D00

**VLAN 28 - Management (34 devices on various ports):**

## VLAN 29 — Home Automation / IoT Devices (74+ devices)

Port 2 and port 26 host your Home Assistant/IoT ecosystem:

- ~74 IoT/Home Assistant devices

  - 1027F5-31F362 connected to port 2
  - 105A95-B47398 connected to port 26
  - 1C3BF3-8DC046 connected to port 26
  - 2CF432-1CBFE7 connected to port 26
  - 2CF432-4A78A8 connected to port 2
  - 2CF432-6E6F05 connected to port 2
  - 2CF432-6E6F5D connected to port 26
  - 2CF432-77373B connected to port 26
  - 2CF432-C4BE20 connected to port 2
  - 381F8D-CF91D0 connected to port 26

## VLAN 30 — LAN User Network (30 devices)

Typically personal computers, phones, gaming consoles, media devices:

- 00177A-2B3F06 connected to port 2
- 00226C-2DC4FE connected to port 26
- 006008-6997EF connected to port 1
- 00A0DE-93F135 connected to port 26
- 102C6B-BEF8DE connected to port 26
- 102C6B-BF1332 connected to port 26
- 1C4D70-2427BE connected to port 26
- 1CF29A-1D9B13 connected to port 26
- 44070B-D7C01F connected to port 26
- 50465D-A51C7B connected to port 24

## VLAN 27 — Guest Network (1 device)

- Port 26: D6ED0F-4C5D00

## VLAN 28 — Management Network (~35 devices)

The switch itself plus wired management clients:

## VLAN Traffic Flow Summary

### VLAN 28 — Management Network

- **Direct access:** ~6 devices on Gi ports (local management clients)  
- **Uplink path:** ~4 devices via EX0/26 to Aruba uplink  
- **Total visible:** ~10 devices across both switches

### VLAN 29 — Home Automation / IoT

- **Direct access:** ~45 devices on Gi ports (primary access)  
- **Uplink path:** ~13 devices via EX0/26 (visible from Aruba side)  
- **Total visible:** ~58 IoT/Home Assistant devices

### VLAN 30 — LAN User Network

- **Direct access:** ~21 devices on Gi ports (user devices)  
- **Uplink path:** ~5 devices via EX0/26  
- **Total visible:** ~26 user/client devices

### VLAN 31 — DMZ

- **Uplink only:** ~4 devices accessible via EX0/26  
- These are external-facing services (AdGuard DNS, etc.)

## Ring Topology Benefits

1. **Redundancy:** If one uplink fails, MRP reroutes traffic through alternate path
2. **Single point of failure:** Only router/firewall is single point  
3. **Load balancing:** Traffic can load-balance across ring links

## Device Accessibility Map

Devices on **EX0/26** port (Siemens uplink) are also visible from Aruba switch (and vice versa), meaning:

- Failover to alternate path is automatic  
- No configuration changes needed for redundancy  
- Devices appear in both MAC tables when reachable via either path  

## Combined Network Summary

| Switch | Total Devices Visible | Uplink Connections |
|--------|----------------------|--------------------|
| Aruba JL253A | ~159 devices (from MAC table) | 1 to router, 1 to Siemens |
| Siemens XR326-2C | ~99 devices (from MAC table) | 1 to Aruba, rest to local devices |

## Related

- [01 — Architecture](/nanda/01-architecture/) - Core network design  
- [09-siemens-switch.md](/nanda/09-siemens-switch/) - Siemens switch configuration  
- README.md - Overview of all NANDA documentation

---

*Analysis based on MAC address tables from both switches.*

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## Source Disclaimer

- [x] AI Generated
- [ ] Human Generated
- [ ] AI Edited
- [ ] Human Edited