Business Networks: Wi-Fi 6 and Professional Configuration

A badly configured business network can cost as much as €50,000 a year in lost productivity. Is your infrastructure up to it?

Why do you need Wi-Fi 6?

Wi-Fi 6 (802.11ax) brings significant improvements:

• Speed: up to 9.6 Gbps (vs 3.5 Gbps on Wi-Fi 5)
• Capacity: 4× more simultaneous devices
• Latency: reduced by 75%
• Efficiency: 40% better battery life
• Security: WPA3 built in

Planning a business network

Requirements analysis

Device inventory

• Laptops and phones: 25 Mbps per device
• IoT devices: 1–5 Mbps per device
• Video conferencing: 50 Mbps per room
• Servers: 1 Gbps minimum

Coverage mapping

• Site survey with professional tools
• Identification of high-density areas
• Interference analysis
• AP planning per zone

Total bandwidth

• Rule of thumb: 20–30 Mbps per active user
• Concurrency factor: 60–80%
• Future growth: +25% a year
• Redundancy: double the critical bandwidth

Recommended network architecture

Small company (1–20 employees)

Internet (100/100 Mbps)
    ↓
Business router/firewall
    ↓
24-port managed switch
    ↓
2–3 Wi-Fi 6 access points

Medium company (21–100 employees)

Internet (500/500 Mbps + backup)
    ↓
Business firewall + UTM
    ↓
Core switch (Layer 3)
    ↓ ↓ ↓
Access switches per floor
    ↓
5–10 Wi-Fi 6 access points

Large company (100+ employees)

Dual internet (1 Gbps + backup)
    ↓
Firewall cluster + load balancer
    ↓
Redundant core switch
    ↓ ↓ ↓
Distribution switches
    ↓ ↓ ↓
Access switches + PoE++
    ↓
10–50+ Wi-Fi 6E access points

Recommended equipment by budget

Low budget (€2,000–5,000)

• Router: Ubiquiti Dream Machine Pro
• Switch: Netgear GS724T
• APs: Ubiquiti U6-Lite
• Cabling: basic Cat6

Mid budget (€5,000–15,000)

• Firewall: SonicWall TZ670
• Switch: Cisco CBS350 series
• APs: Cisco Meraki MR36
• Cabling: certified Cat6A

High budget (€15,000+)

• Firewall: Fortinet FortiGate
• Switch: Cisco Catalyst 9300
• APs: Aruba 630 series
• Cabling: Cat6A + fibre optic

Business VLAN configuration

VLAN 10 — Management

• Network equipment and servers
• IT technical access only
• Maximum security

VLAN 20 — Employees

• Laptops and corporate devices
• Access to internal resources
• Filtered web browsing

VLAN 30 — Guests

• Temporary access without credentials
• Internet only, no internal network
• Limited bandwidth

VLAN 40 — IoT

• Smart devices
• Printers, cameras, sensors
• Restricted access

VLAN 50 — VoIP

• IP phones
• Priority QoS
• Minimum latency

Advanced network security

1. 802.1X authentication

• Individual credentials per device
• Digital certificates
• A RADIUS server for authentication

2. Network Access Control (NAC)

• Device compliance checks
• Automatic quarantine of threats
• Granular policies per user

3. Monitoring and detection

• SIEM for log analysis
• Real-time IDS/IPS
• Anomalous behaviour analysis

Business Quality of Service (QoS)

Priority 1 (critical)

• VoIP: 64 kbps guaranteed
• Video conferencing: up to 50% of bandwidth
• Business-critical applications

Priority 2 (high)

• Corporate email
• ERP/CRM systems
• Business file transfers

Priority 3 (normal)

• General web browsing
• Productivity applications
• Software updates

Priority 4 (low)

• Personal streaming
• Social media
• Non-critical downloads

Monitoring and maintenance

Essential tools

• PRTG Network Monitor: all-round monitoring
• SolarWinds NPM: performance analysis
• Nagios: proactive alerting
• Wireshark: traffic analysis

Key metrics to monitor

• Bandwidth utilisation per VLAN
• Average latency per segment
• Packet loss on critical links
• Device temperature and CPU
• Connected devices per AP

Maintenance plan

Daily

• Check automatic alerts
• Review security logs
• Monitor utilisation

Weekly

• Back up configurations
• Review performance reports
• Check for offline devices

Monthly

• Firmware updates
• Audit of users and permissions
• Capacity analysis

Quarterly

• Coverage site survey
• Review of security policies
• Capacity planning

Common troubleshooting

Speed problems

1. Check Wi-Fi channel utilisation
2. Analyse RF interference
3. Review the QoS configuration
4. Check for duplex mismatch on switches

Connectivity problems

1. Check the DHCP scope
2. Review the VLAN configuration
3. Analyse authentication logs
4. Check spanning tree

Migrating to Wi-Fi 6

Phase 1 (month 1): planning

• Detailed site survey
• Design of the new topology
• Equipment selection
• Planning the maintenance windows

Phase 2 (month 2): gradual rollout

• Upgrade of the cabled infrastructure
• Installation of new APs zone by zone
• Configuration and testing
• Gradual migration of users

Phase 3 (month 3): optimisation

• Fine-tuning the configuration
• Performance analysis
• User training
• Complete documentation

Expected ROI

• Productivity: +15% from better connectivity
• IT support: −30% network incidents
• Scalability: +200% supported devices
• Security: −80% network-related incidents

Implementation checklist

✅ Professional site survey completed ✅ Network design validated by experts ✅ Business-grade equipment selected ✅ VLANs and security configured ✅ QoS implemented according to priorities ✅ Monitoring and alerting active ✅ Complete documentation available ✅ IT team trained on the new systems ✅ Backup and disaster recovery plan ✅ Maintenance procedures established