lcbp3/specs/04-Infrastructure-OPS/switch-configuration-guide.md

# Switch Configuration Guide — Omada SDN V6

**Version:** 3.0
**Last Updated:** 2026-04-24
**Status:** Production
**Author:** Infrastructure Team
**Maintainer:** NAP-DMS DevOps
**Scope:** LCBP3 Network Infrastructure (SG3210X-M2 + SG2428P)

---

## Table of Contents

1. [Overview](#overview)
2. [VLAN Definitions](#vlan-definitions)
3. [Port Profiles](#port-profiles)
4. [VLAN Mapping](#vlan-mapping)
5. [Network Diagram](#network-diagram)
6. [Configuration Procedure](#configuration-procedure)
7. [Change Log](#change-log)
8. [Quick Reference](#quick-reference--edit-port-values)
9. [Pre-Deployment Checklist](#pre-deployment-checklist)
10. [Testing Guide](#testing-guide--vlan--lacp--stp)
11. [Security & Optimization](#security--optimization-recommended)
12. [Related Documents](#related-documents)

---

## Overview

เอกสารนี้กำหนด Port Profile templates และ VLAN mapping configuration สำหรับ LCBP3 network infrastructure โดยใช้ TP-Link Omada SDN V6 Controller (OC200)

**Audience:** Network Administrator, DevOps Engineer
**Prerequisites:** Omada SDN Controller v6.x, สิทธิ์ Admin บน OC200
**Related ADRs:** ADR-016 (Security), ADR-009 (Database Strategy — ถ้ามี Network DB)

### Network Equipment

| Device | Model | Role |
|--------|-------|------|
| Core Switch | SG3210X-M2 | 10G Core Switch |
| Access Switch | SG2428P | PoE Access Switch |
| NAS Storage | QNAP / ASUSTOR | Network Attached Storage |
| Unmanaged Switch 1 | TL-SG1210P | IP Phone + PC |
| Unmanaged Switch 2 | TL-SL1226P | CCTV |
| Wireless AP | EAP610 | Wi-Fi Access Points |
| Router | ER7206 | Edge Router |

### Configuration Concepts

**Port Profile** — Template defining port-level settings (STP Security, Loopback Control, Multicast Fast Leave, Flow Control, EEE, LLDP-MED, PoE). Port Profiles do NOT contain VLAN configuration.

**Edit Port** — VLAN assignment step where Native Network (Untagged), Tagged Network, and Voice Network are configured, and a Port Profile is applied.

---

## 🧠 Key Concepts (Before Using This Config)

- ใช้ **STP เท่านั้น (เลิก Loop Detection)** — Spanning Tree Protocol สำหรับ loop prevention
- **Harden Access Port ด้วย BPDU Guard** — ป้องกันการเสียบ switch โดยไม่ได้รับอนุญาต
- **กัน Rogue Switch ด้วย Root Guard** — ป้องกัน switch เถื่อนยึด root bridge
- **ทำ Trunk ให้ clean + predictable** — Native VLAN 999 สำหรับทุก trunk port
- **เผื่อ future VLAN expansion** — รองรับ VLAN เพิ่มเติมในอนาคต
- **VLAN 999 (was 99)** — เปลี่ยนจาก VLAN 99 เป็น 999 เพื่อความปลอดภัย

---

## VLAN Definitions

| VLAN ID | Name | Purpose | Subnet | Gateway | DHCP Range |
|---------|------|---------|--------|---------|-------------|
| 10 | NAS-ADMIN | NAS Storage & Admin Desktop | 192.168.10.0/24 | 192.168.10.1 | 192.168.10.50–199 |
| 20 | MGMT | Network Management (OC200) | 192.168.20.0/24 | 192.168.20.1 | 192.168.20.50–199 |
| 30 | USERS | User PCs, Printers, Staff WiFi | 192.168.30.0/24 | 192.168.30.1 | 192.168.30.50–199 |
| 40 | CCTV | CCTV Cameras, IoT Devices | 192.168.40.0/24 | 192.168.40.1 | 192.168.40.50–199 |
| 50 | VOICE | IP Phones | 192.168.50.0/24 | 192.168.50.1 | 192.168.50.50–199 |
| 70 | GUEST | Guest WiFi | 192.168.70.0/24 | 192.168.70.1 | 192.168.70.50–199 |
| 999 | NATIVE | Trunk Native VLAN (No DHCP) — Hardened | — | — | — |
| 60 | UNUSED | Reserved for future use | — | — | — |

---

## Port Profiles

### Profile 1 — 001-CORE-TRUNK-LACP 🔷

**Purpose:** LACP trunk links between Core and Access switches / Router

**Applied To:**
- SG3210X-M2 Port 1–2 (to SG2428P Port 21–22)
- SG3210X-M2 Port 9 (to ER7206)
- SG2428P Port 21–22 (to SG3210X-M2 Port 1–2)

**Configuration:**

```bash
Loopback Control: Spanning Tree

STP:
- Loop Protect: ENABLE
- Root Protect: DISABLE
- TC Guard: DISABLE
- BPDU Guard: DISABLE
- BPDU Filter: DISABLE

General:
- Flow Control: ON
- EEE: OFF
- Port Isolation: OFF
```

📌 **ใช้กับ:** Core ↔ Access, Core ↔ Router

---

### Profile 2 — 002-NAS-LACP 🔷

**Purpose:** LACP links to NAS storage devices (QNAP / ASUSTOR)

**Applied To:**
- SG3210X-M2 Port 3–4 (to QNAP)
- SG3210X-M2 Port 5–6 (to ASUSTOR)

**Configuration:**

```bash
Loopback Control: Spanning Tree

STP:
- Loop Protect: ENABLE
- Root Protect: DISABLE
- BPDU Guard: DISABLE

General:
- Flow Control: ON
- EEE: OFF
```

⚠️ **เหตุผล:** NAS บางรุ่นส่ง BPDU แปลก ๆ → ห้ามเปิด BPDU Guard

---

### Profile 3 — 003-UNMANAGED-SWITCH 🔷⭐ (สำคัญมาก)

**Purpose:** Downstream links to unmanaged switches — ป้องกัน Rogue Switch

**Applied To:**
- SG2428P Port 25 (to TL-SL1226P — CCTV)
- SG2428P Port 26 (to TL-SG1210P — IP Phone + PC)

**Configuration:**

```bash
Loopback Control: Spanning Tree

STP:
- Root Protect: ENABLE 🔥
- Loop Protect: ENABLE
- BPDU Guard: DISABLE
- TC Guard: DISABLE

General:
- Flow Control: ON
- EEE: OFF
```

📌 **ป้องกัน:** เสียบ switch เถื่อน → ยึด root ไม่ได้

---

### Profile 4 — 004-AP-TRUNK 🔷

**Purpose:** Trunk links to wireless access points (EAP610)

**Applied To:**
- SG2428P Port 1–16 (to EAP610)

**Configuration:**

```bash
General:
- 802.1X Control: Auto
- Port Isolation: DISABLE
- Flow Control: ENABLE
- EEE: DISABLE
- Multicast Fast Leave: IGMP (IPv4)->DISABLE, MLD (IPv6)->DISABLE
- Loopback Control: Spanning Tree
  - Edge Port: ENABLE
  - Spanning Tree Config:
    - Loop Protect: DISABLE
    - Root Protect: DISABLE
    - TC Guard: DISABLE
    - BPDU Protect: ENABLE 🔥 (ใช้คู่กับพอร์ตประเภทขอบเครือข่าย (Edge Port) ที่เชื่อมต่อกับอุปกรณ์ปลายทางเท่านั้น เช่น เครื่อง PC, เครื่องพิมพ์ หรือ Access Point))
    - BPDU Filter: DISABLE
    - BPDU Forward: DISABLE
LLDP-MED: ENABLE
Bandwidth Control: Storming Control
  - Rate Mode: Ratio
    - Broadcast: 1%
    - Unknown Unicast: 2%
    - Multicast: 2%
    - Action: Drop

📌 **หมายเหตุ:** AP ไม่ควรส่ง BPDU → เปิด guard ได้

---

### Profile 5 — 005-VOICE-ONLY 🔷

**Purpose:** Direct connections to IP phones

**Applied To:**
- SG2428P Port 17–18 (to IP Phone)

**Configuration:**

```bash
Loopback Control: Spanning Tree

STP:
- Edge Port: ENABLE
- BPDU Guard: ENABLE 🔥

General:
- LLDP-MED: ENABLE
- Flow Control: ON
```

---

### Profile 6 — 006-ACCESS-PC 🔷⭐

**Purpose:** Direct connections to PCs and printers — Hardened Access Port

**Applied To:**
- SG2428P Port 23 (to Printer)
- SG3210X-M2 Port 8 (to Admin Desktop)
- General PC connections

**Configuration:**

```bash
Loopback Control: Spanning Tree

STP:
- Edge Port: ENABLE
- BPDU Guard: ENABLE 🔥🔥🔥 (สำคัญสุด)

General:
- Flow Control: ON
- EEE: OFF
```

📌 **ถ้ามีคนเสียบ switch:** → Port จะ shutdown ทันที

---

### Profile 7 — 007-DEFAULT-MGMT 🔷

**Purpose:** Default configuration for management ports

**Applied To:**
- Management ports
- Ports requiring no special configuration

**Configuration:**

```bash
Loopback Control: Spanning Tree

STP:
- Edge Port: ENABLE
- BPDU Guard: ENABLE

General:
- Default
```

---

## VLAN Mapping 🔶

### SG3210X-M2 (Core) Port Configuration

| Port | Destination | Profile | Native (Untagged) | Tagged | Voice |
|------|-------------|---------|-------------------|--------|-------|
| 1-2 | SG2428P (LACP) | 001-CORE-TRUNK-LACP | 999 | 10,20,30,40,50,70 | Off |
| 3-4 | QNAP (LACP) | 002-NAS-LACP | 10 | 20 🔥 | Off |
| 5-6 | ASUSTOR (LACP) | 002-NAS-LACP | 10 | 20 🔥 | Off |
| 7 | Reserved (future expansion) | 007-DEFAULT-MGMT | 999 | None | Off |
| 8 | Admin Desktop | 006-ACCESS-PC | 10 | None | Off |
| 9 | ER7206 | 001-CORE-TRUNK-LACP | 999 | 10,20,30,40,50,70 | Off |
| 10 | Reserved (future expansion) | 007-DEFAULT-MGMT | 999 | None | Off |

📌 **NAS (Port 3-6) ปรับใหม่:** เพิ่ม Tagged VLAN 20 สำหรับ MGMT redundancy

---

### SG2428P (Access) Port Configuration

| Port | Destination | Profile | Native (Untagged) | Tagged | Voice |
|------|-------------|---------|-------------------|--------|-------|
| 1-16 | EAP610 | 004-AP-TRUNK | 999 | 10,20,30,40,50,70 🔥 allow all | Off |
| 17-18 | IP Phone | 005-VOICE-ONLY | 50 | None | Enable (VLAN 50) |
| 19-20 | Reserved (future expansion) | 007-DEFAULT-MGMT | 999 | None | Off |
| 21-22 | SG3210X-M2 (LACP) | 001-CORE-TRUNK-LACP | 999 | 10,20,30,40,50,70 | Off |
| 23 | Printer | 006-ACCESS-PC | 30 | None | Off |
| 24 | OC200 | 007-DEFAULT-MGMT | 20 | None | Off |
| 25 | TL-SL1226P (CCTV) | 003-UNMANAGED-SWITCH | 40 | None | Off |
| 26 | TL-SG1210P (IP Phone + PC) | 003-UNMANAGED-SWITCH | 30 | 50 | Enable (VLAN 50) |
| 27-28 | Reserved (future expansion) | 007-DEFAULT-MGMT | 999 | None | Off |

📌 **AP Ports (1-16) ปรับใหม่:** Allow all VLANs สำหรับ future expansion

---

## Network Diagram

```
                           ┌──────────────┐
                           │   ER7206     │
                           │ (Trunk 999)  │
                           └──────┬───────┘
                                  │
                                  ▼
                     ┌──────────────────────────┐
                     │     SG3210X-M2 (Core)    │
                     │    [Root Bridge 4096]    │
                     └──────────────────────────┘
        LACP 1-2  /   |      |       |       |   \  Reserved
                   /   |      |       |       |    \
                  ▼    ▼      ▼       ▼       ▼     ▼
         SG2428P (Access)   QNAP   ASUSTOR   Admin   Reserved
         [Priority 8192]   (VLAN10+20) (VLAN10+20) (VLAN10)
         (AP 1–16 Trunk)

Uplink SG3210X‑M2 (1–2) ↔ SG2428P (21–22)

WiFi Staff → VLAN 30
WiFi Guest → VLAN 70
CCTV → VLAN 40
IP Phone → VLAN 50
Printer → VLAN 30
Admin Desktop → VLAN 10
NAS → VLAN 10 (+20 MGMT)
OC200 → VLAN 20
```

---

## Configuration Procedure

### Step 1 — Create Port Profiles

1. Navigate to Omada SDN Controller → Port Profiles
2. Create each profile listed in the Port Profiles section
3. Configure all settings as specified
4. **Do not configure VLANs in Port Profiles** (VLANs are configured in Edit Port)

### Step 2 — Configure Port VLANs

1. Navigate to Omada SDN Controller → Switches → Edit Port
2. For each port, configure:
   - **Native Network (Untagged)** — The access VLAN for untagged traffic
   - **Tagged Network** — VLANs allowed on the trunk (comma-separated)
   - **Voice Network** — Voice VLAN (if applicable)
   - **Profile** — Select the appropriate Port Profile from Step 1
3. Apply configuration per the VLAN Mapping tables

---

## Change Log

| Version | Date | Changes |
|---------|------|---------|
| 3.0 | 2026-04-24 | **FINAL VERSION** — STP-only (no Loop Detection), BPDU Guard on access ports, Root Guard on unmanaged switch ports, VLAN 99→999, NAS with MGMT redundancy (VLAN 20 tagged), AP allow-all VLANs, Security Hardening section |
| 2.0 | 2026-04-24 | Updated port mappings (LACP 21-22), new VLAN scheme (30/40/50/70), consolidated CCTV/IoT to VLAN 40, added DHCP table, renamed PC-ONLY to ACCESS-PC |
| 1.0 | 2026-04-23 | Initial version with basic port profiles and VLAN mapping |

---

## Quick Reference — Edit Port Values

### SG3210X-M2

| Port | Native | Tagged | Profile | Voice |
|------|--------|--------|---------|-------|
| 1-2 | 999 | 10,20,30,40,50,70 | 001-CORE-TRUNK-LACP | Off |
| 3-4 | 10 | 20 | 002-NAS-LACP | Off |
| 5-6 | 10 | 20 | 002-NAS-LACP | Off |
| 7 | 999 | — | 007-DEFAULT-MGMT | Off |
| 8 | 10 | — | 006-ACCESS-PC | Off |
| 9 | 999 | 10,20,30,40,50,70 | 001-CORE-TRUNK-LACP | Off |
| 10 | 999 | — | 007-DEFAULT-MGMT | Off |

### SG2428P

| Port | Native | Tagged | Profile | Voice |
|------|--------|--------|---------|-------|
| 1-16 | 999 | 10,20,30,40,50,70 | 004-AP-TRUNK | Off |
| 17-18 | 50 | — | 005-VOICE-ONLY | 50 |
| 19-20 | 999 | — | 007-DEFAULT-MGMT | Off |
| 21-22 | 999 | 10,20,30,40,50,70 | 001-CORE-TRUNK-LACP | Off |
| 23 | 30 | — | 006-ACCESS-PC | Off |
| 24 | 20 | — | 007-DEFAULT-MGMT | Off |
| 25 | 40 | — | 003-UNMANAGED-SWITCH | Off |
| 26 | 30 | 50 | 003-UNMANAGED-SWITCH | 50 |
| 27-28 | 999 | — | 007-DEFAULT-MGMT | Off |

---

## Pre-Deployment Checklist

ก่อน Apply ค่า Configuration:
- [ ] สร้าง VLANs 10, 20, 30, 40, 50, 70, 999 ใน Omada Controller (VLAN 999 = Hardened Native)
- [ ] สร้าง Port Profiles 001–007 ครบถ้วน (STP Mode — ไม่ใช้ Loop Detection)
- [ ] ตรวจสอบ LACP Group Configuration (Port 1-2 ↔ Port 21-22)
- [ ] ตั้งค่า DHCP Server ตามตาราง VLAN Definitions
- [ ] ตรวจสอบว่า OC200 อยู่บน VLAN 20 และมี IP 192.168.20.x
- [ ] ตรวจสอบ Voice VLAN Enable บน Port 17-18 และ 26
- [ ] กำหนด STP Priority: Core=4096, Access=8192
- [ ] สำรอง Configuration ปัจจุบันก่อน Apply

---

# Testing Guide — VLAN + LACP + STP

การทดสอบทีละ Layer โดยไม่ต้องใช้เครื่องมือพิเศษ — ใช้แค่ PC + ping + OC200 UI

---

## PART 1 — Testing VLAN (Step-by-Step)

### Goal
- ตรวจสอบว่าแต่ละพอร์ตอยู่ VLAN ถูกต้อง
- ตรวจสอบว่า Tagged/Untagged ทำงาน
- ตรวจสอบว่า DHCP แจก IP ถูก subnet
- ตรวจสอบว่า WiFi → VLAN ถูกต้อง

---

### STEP 1 — Test VLAN 10 (NAS-ADMIN)

**Test Equipment:**
- Admin Desktop (Port 8 SG3210X-M2)
- QNAP / ASUSTOR

**Procedure:**
1. Connect Admin Desktop → Port 8
2. Open Command Prompt
3. Type:
   ```
   ipconfig
   ```
4. Expected IP range:
   ```
   192.168.10.x
   ```

**Ping Tests:**
```
ping 192.168.10.1   ← Gateway
ping <QNAP-IP>
ping <ASUSTOR-IP>
```

**Expected Result:**
- All pings successful
- Should NOT ping to VLAN 30/40/50/70 (if ACL configured)

---

### STEP 2 — Test VLAN 30 (USERS)

**Test Equipment:**
- General PC
- Printer
- Staff WiFi (SSID: Staff)

**Procedure:**
1. Connect PC → Port 23 or Port 26 (via TL-SG1210P)
2. Type:
   ```
   ipconfig
   ```
3. Expected IP:
   ```
   192.168.30.x
   ```

**Ping Tests:**
```
ping 192.168.30.1
ping <Printer-IP>
```

**WiFi Staff Test:**
1. Connect to SSID Staff
2. Type:
   ```
   ipconfig
   ```
3. Expected IP: 192.168.30.x

---

### STEP 3 — Test VLAN 40 (CCTV/IoT)

**Test Equipment:**
- CCTV Camera (via TL-SL1226P Port 25)

**Procedure:**
1. Open OC200 → Clients
2. Camera must show as VLAN 40
3. Test ping from Admin Desktop:
   ```
   ping <CCTV-IP>
   ```

**Expected Result:**
- Ping successful
- DHCP must assign IP 192.168.40.x

---

### STEP 4 — Test VLAN 50 (VOICE)

**Test Equipment:**
- IP Phone (Port 17–18 SG2428P)

**Procedure:**
1. IP Phone boots up
2. Expected IP:
   ```
   192.168.50.x
   ```
3. In OC200 → Clients, must see Voice VLAN 50

**LLDP-MED Test:**
In OC200 → Switch → Port 17–18, must see:
```
LLDP-MED: Active
Voice VLAN: 50
```

---

### STEP 5 — Test VLAN 70 (Guest WiFi)

**Procedure:**
1. Connect to SSID Guest
2. Type:
   ```
   ipconfig
   ```
3. Expected IP:
   ```
   192.168.70.x
   ```

**Isolation Test:**
```
ping 192.168.30.1   ← Must NOT pass
ping 192.168.10.1   ← Must NOT pass
```

---

## PART 2 — Testing LACP (Step-by-Step)

### Goal
- ตรวจสอบว่า LACP ระหว่าง SG3210X-M2 ↔ SG2428P ทำงาน
- ตรวจสอบว่า QNAP/ASUSTOR LACP ทำงาน
- ตรวจสอบว่าไม่มี Mis-config

---

### STEP 1 — Check LACP Status in OC200

**Path:** Insight → Switch → LAG Status

Expected status:

**SG3210X-M2:**
- LAG1 (Port 1–2) → **Up**
- LAG2 (Port 3–4) → **Up**
- LAG3 (Port 5–6) → **Up**

**SG2428P:**
- LAG1 (Port 21–22) → **Up**

---

### STEP 2 — Test Load Balancing

**Procedure:**
1. Open QNAP → File Station
2. Copy large file (10–20GB) to Admin Desktop
3. Open Task Manager → Performance → Ethernet
4. Must see traffic on both links (Port 3–4 or 5–6)

**Uplink Test:**
1. Run Speedtest between PC VLAN 30 → NAS VLAN 10
2. Must achieve > 1Gbps (if 2Gbps LACP)

---

### STEP 3 — Test Failover

**Procedure:**
1. Disconnect cable from **Port 1** of SG3210X-M2
2. LACP must remain **Up** (using Port 2)
3. Disconnect Port 2 → LACP must go Down

Repeat test with QNAP/ASUSTOR

---

## PART 3 — Testing STP (Step-by-Step)

### Goal
- ตรวจสอบว่าไม่มี Loop
- ตรวจสอบว่า Root Bridge ถูกต้อง
- ตรวจสอบว่า STP Security ทำงาน

---

### STEP 1 — Check Root Bridge

**Path:** Devices → SG3210X-M2 → Ports → STP

Expected:
```
SG3210X-M2 = Root Bridge
```

If not, adjust Priority:
```
SG3210X-M2 Priority = 4096
SG2428P Priority = 8192
```

---

### STEP 2 — Test Loop Detection

**Safe Test Method:**
1. Go to TL-SG1210P (Port 26 SG2428P)
2. Create loop with LAN cable (Port 1 ↔ Port 2)
3. Check OC200 → Alerts

Expected alert:
```
Loop Detected on Port 26
Port Shutdown (BPDU Protect)
```

Port must auto-shutdown

---

### STEP 3 — Test STP Blocking

**Procedure:**
1. Connect cable from SG2428P Port 19 → SG2428P Port 20
2. Check OC200 → Switch → Ports

Expected:
```
STP State: Blocking
```

---

### STEP 4 — Test Topology Change (TC Guard)

**Procedure:**
1. Power cycle AP (Port 1–16)
2. Check OC200 → Logs

Expected: **NO** message:
```
Topology Change Detected
```

Because TC Guard is enabled

---

## PART 4 — Testing Checklist (SOP)

### VLAN Tests
- [ ] VLAN 10 gets IP 192.168.10.x
- [ ] VLAN 30 gets IP 192.168.30.x
- [ ] VLAN 40 gets IP 192.168.40.x
- [ ] VLAN 50 gets IP 192.168.50.x
- [ ] VLAN 70 gets IP 192.168.70.x

### WiFi Tests
- [ ] Staff WiFi → VLAN 30
- [ ] Guest WiFi → VLAN 70

### Device Tests
- [ ] CCTV → VLAN 40
- [ ] IP Phone → VLAN 50
- [ ] Printer → VLAN 30
- [ ] Admin Desktop → VLAN 10
- [ ] NAS → VLAN 10
- [ ] OC200 → VLAN 20

### LACP Tests
- [ ] LACP SG3210X-M2 ↔ SG2428P = Up
- [ ] LACP QNAP = Up
- [ ] LACP ASUSTOR = Up
- [ ] Load balancing works (2Gbps)
- [ ] Failover works (single link failure)

### STP Tests
- [ ] Root Bridge = SG3210X-M2 (Priority 4096)
- [ ] BPDU Guard shutdown test (เสียบ switch ที่ port PC → port ต้อง shutdown)
- [ ] Root Guard works (003-UNMANAGED-SWITCH)
- [ ] STP Blocking works
- [ ] TC Guard works (no topology change on AP reboot)

---

# 🔐 Security Hardening (ต้องทำเพิ่ม)

Required security configurations for Enterprise-grade network protection.

---

## DHCP Snooping 🔥

```bash
Global: ENABLE

Trusted Ports:
- Uplink ไป Router (ER7206)
- Core Trunk (Port 1-2, 9)
```

**Path:** Settings → Wired Networks → Switch → DHCP Snooping

1. Enable **DHCP Snooping** globally
2. Mark **Trusted Ports**:
   - SG3210X-M2 Port 9 (to ER7206)
   - SG3210X-M2 Port 1-2 (Core Trunk)
   - SG2428P Port 21-22 (Uplink to Core)
3. **Untrusted:** ทุก access port (จะถูก block ถ้าส่ง DHCP Offer)

---

## Storm Control (AP Ports) 🔥

```bash
Broadcast: 1%
Multicast: 2%
Unknown: 2%
```

**Path:** Settings → Wired Networks → Switch → Port Profile → 004-AP-TRUNK

1. Navigate to **Bandwidth Control / Storm Control**
2. Configure:
   - Broadcast: 1% (หรือ 1000 pps)
   - Multicast: 2% (หรือ 2000 pps)
   - Unknown Unicast: 2% (หรือ 2000 pps)
3. Save

📌 **หมายเหตุ:** ใช้ percentage หรือ pps ตามความเหมาะสมกับ traffic

---

## STP Priority (Root Bridge Election) 🔥

```bash
SG3210X-M2 (Core): 4096
SG2428P (Access): 8192
```

**Path:** Devices → Switch → Config → STP → Priority

1. **SG3210X-M2:** Set Priority = **4096** (Root Bridge)
2. **SG2428P:** Set Priority = **8192** (Backup Root)
3. Save and verify:
   ```
   OC200 → Topology → Root Bridge = SG3210X-M2
   ```

📌 **สำคัญ:** Core ต้องเป็น Root Bridge เสมอ

---

## Jumbo Frame 🔥

```bash
MTU: 9000
(ต้องตั้งทุก device ให้เท่ากัน)
```

### SG3210X-M2
**Path:** Devices → SG3210X-M2 → Config → Switch Settings
```
Jumbo Frame: Enable
MTU: 9000
```

### QNAP
**Path:** Control Panel → Network & Virtual Switch → Interfaces
```
MTU: 9000
```

### ASUSTOR
**Path:** Settings → Network → Interface → Advanced
```
Jumbo Frame: 9000
```

⚠️ **คำเตือน:** ถ้าตั้งไม่เท่ากันทุก device → จะมีปัญหา fragmentation หรือ packet drop

---

## 💥 Final Validation Checklist

### Connectivity Tests
- [ ] LACP = UP ทุกเส้น (Core↔Access, NAS)
- [ ] Root Bridge = Core Switch (SG3210X-M2 Priority 4096)
- [ ] เสียบ switch ที่ port PC → port ต้อง shutdown (BPDU Guard)
- [ ] WiFi ได้ VLAN ถูกต้อง (Staff=30, Guest=70)
- [ ] NAS เข้าถึงได้ทั้ง VLAN 10 และ 20
- [ ] Guest VLAN เข้า LAN ไม่ได้ (isolation)

### Security Tests
- [ ] DHCP Snooping blocks rogue DHCP
- [ ] Storm Control limits broadcast
- [ ] BPDU Guard shuts down unauthorized switches
- [ ] Root Guard prevents rogue root bridge

### Performance Tests
- [ ] Jumbo Frame works (MTU 9000 end-to-end)
- [ ] LACP load balancing (2Gbps aggregate)
- [ ] Failover works (single link failure)

---

## Related Documents

- Network Architecture Design — `specs/02-architecture/02-03-network-design.md`
- VLAN Scheme — See [VLAN Definitions](#vlan-definitions) section
- IP Addressing Scheme — See DHCP table in [VLAN Definitions](#vlan-definitions) section
- Security Guidelines — `specs/06-Decision-Records/ADR-016-security-authentication.md`
- Release Policy — `specs/04-Infrastructure-OPS/04-08-release-management-policy.md` (สำหรับ network changes)

---

## Document Metadata

| Property | Value |
|----------|-------|
| **Type** | Infrastructure Specification |
| **Language** | Thai (explanations), English (technical terms) |
| **Standards** | AGENTS.md v1.8.9 |
| **Review Cycle** | Per release or on equipment change |
| **Approval Required** | Yes — Infrastructure Lead + Security Review |