IT Network Infrastructure for a Corporate Office from Scratch

Setting up IT Network Infrastructure for a Corporate Office from Scratch involves multiple phases—planning, design, procurement, implementation, and validation. Here’s an end-to-end roadmap:

✅ Phase 1: Requirement Gathering & Planning

1. Business Needs Analysis
   • Number of employees, devices, meeting rooms.
   • Applications (VoIP, video conferencing, ERP, cloud apps).
2. Capacity Planning
   • Bandwidth requirements (ISP sizing).
   • Network segmentation (VLANs for departments).
3. Compliance & Security
   • ISO 27001, SOC2, GDPR, local regulations.
4. Budgeting
   • CapEx vs OpEx, hardware/software licensing.

✅ Phase 2: Network Design

1. Topology Selection
   • Star topology for LAN.
   • Redundant links for critical systems.
2. IP Addressing & VLAN Design
   • Subnetting for departments.
   • DHCP/DNS planning.
3. Security Architecture
   • Firewalls, IDS/IPS, NAC.
4. Wi-Fi Design
   • Heatmaps for AP placement.
   • SSID segregation (Corporate, Guest).
5. High Availability
   • Dual ISP with failover.
   • Redundant core switches.

✅ Phase 3: Hardware & Software Procurement

• Core Network Devices
  • Routers, L3 switches, L2 switches.
• Access Points
  • Enterprise-grade Wi-Fi (Cisco, Aruba, Ruckus).
• Firewalls
  • Next-gen firewall (Fortinet, Palo Alto).
• Cabling
  • Cat6/Cat6A or fiber for backbone.
• Racks & Patch Panels
• UPS & Power Backup
• Monitoring Tools
  • NMS (SolarWinds, PRTG), SIEM for security.

✅ Phase 4: Implementation

1. Structured Cabling
   • Follow ANSI/TIA standards.
2. Rack Setup
   • Patch panels, cable management.
3. Device Configuration
   • Switches, routers, firewalls.
4. Wi-Fi Deployment
   • AP mounting, controller setup.
5. ISP Integration
   • Primary + backup links.
6. Security Setup
   • Firewall rules, VPN, NAC.
7. Monitoring & Alerts
   • SNMP, syslog, dashboards.

✅ Phase 5: Testing & Validation

• Connectivity Tests
  • Ping, traceroute, throughput.
• Failover Tests
  • ISP redundancy, switch failover.
• Security Tests
  • Vulnerability scan, penetration test.
• Wi-Fi Coverage
  • Validate heatmap predictions.

✅ Phase 6: Documentation & Handover

• Network diagrams (physical & logical).
• IP schema, VLAN mapping.
• Device configs & credentials (secure storage).
• SOPs for troubleshooting & escalation.

✅ Phase 7: Ongoing Management

• Monitoring
  • Real-time dashboards.
• Patch Management
  • Firmware updates.
• Capacity Reviews
  • Quarterly bandwidth & performance checks.
• Disaster Recovery
  • Backup configs, DR drills.