Enterprise CCTV Bandwidth & Storage Calculation Guide
Complete Guide for 300 Hikvision IP Cameras with Cisco Catalyst C9300X-24Y
Level: Beginner to Enterprise
Project Example: 300 Hikvision IP Cameras • 9 Floors • Cisco Catalyst C9300X-24Y • Fiber Backbone • 5 Hikvision NVRs
Introduction
One of the most common mistakes in CCTV design is choosing switches, fiber links, and storage without calculating the required bandwidth and recording capacity.
This tutorial explains how to calculate:
- Camera bandwidth
- Switch bandwidth
- Fiber uplink requirements
- Cisco Core Switch capacity
- NVR network load
- HDD storage
- RAID storage
- Recording duration (7, 15, 30, 60, and 90 days)
Enterprise CCTV Network
300 Hikvision Cameras │ CAT6 │ 9 × 48-Port PoE Switches │ SFP Modules │ Single Mode Fiber │ Main Fiber ODF │ Cisco Catalyst C9300X-24Y │ 24-Port Gigabit Switch │ 5 Hikvision NVRs │ Video Wall
Step 1 – Camera Bitrate
The bitrate depends on:
- Resolution
- Frame Rate
- Compression
- Scene Complexity
Typical Bitrates
| Resolution | H.264 | H.265 | H.265+ |
|---|---|---|---|
| 2 MP (1080p) | 4 Mbps | 2 Mbps | 1.5 Mbps |
| 4 MP | 8 Mbps | 4 Mbps | 3 Mbps |
| 5 MP | 10 Mbps | 5 Mbps | 4 Mbps |
| 8 MP (4K) | 16 Mbps | 8 Mbps | 6 Mbps |
For this project, we'll use:
4 MP • H.265 • 4 Mbps per camera
Step 2 – Calculate Camera Bandwidth
Formula
Bandwidth = Number of Cameras × Bitrate
Example:
30 Cameras
30 × 4 Mbps
Result
120 Mbps
Each floor requires approximately 120 Mbps of camera traffic.
Step 3 – Floor Switch Bandwidth
Each floor has:
- 30 Cameras
- 48-Port PoE Switch
Traffic:
30 × 4 Mbps = 120 Mbps
Recommended uplink:
| Cameras | Required Traffic | Recommended Uplink |
|---|---|---|
| 30 | 120 Mbps | 1 Gbps Fiber |
| 48 | 192 Mbps | 1 Gbps Fiber |
A 1 Gbps SFP fiber uplink provides ample headroom for 30 cameras at 4 Mbps each.
Step 4 – Total Network Bandwidth
300 Cameras
300 × 4 Mbps
Total
1200 Mbps
Approximately 1.2 Gbps of video traffic.
Step 5 – Cisco Core Switch Bandwidth
Incoming traffic:
Floor 1 120 Mbps Floor 2 120 Mbps Floor 3 120 Mbps ... Floor 9 120 Mbps
Total:
1080 Mbps
(9 floors × 120 Mbps)
A Cisco Catalyst C9300X-24Y with high-speed uplink capability easily handles this traffic, leaving capacity for management and future expansion.
Step 6 – NVR Network Traffic
Recommended distribution:
| NVR | Cameras | Estimated Incoming Bandwidth |
|---|---|---|
| NVR-1 | 60 | 240 Mbps |
| NVR-2 | 60 | 240 Mbps |
| NVR-3 | 60 | 240 Mbps |
| NVR-4 | 60 | 240 Mbps |
| NVR-5 | 60 | 240 Mbps |
Each NVR should have at least a 1 Gbps Ethernet connection.
Step 7 – Storage Calculation
Formula
Storage (GB/day) = (Bit Rate × 86,400 seconds) ÷ 8 ÷ 1024
Simplified Example
4 Mbps camera
≈ 42 GB/day
Storage Per Camera
| Resolution | H.265 | Approx. GB/Day |
|---|---|---|
| 2 MP | 2 Mbps | 21 GB |
| 4 MP | 4 Mbps | 42 GB |
| 5 MP | 5 Mbps | 53 GB |
| 8 MP | 8 Mbps | 84 GB |
Step 8 – Storage for 300 Cameras
Each camera
42 GB/day
300 Cameras
42 × 300
Result
12,600 GB/day
≈ 12.6 TB/day
Step 9 – Recording Duration
7 Days
12.6 × 7
≈ 88.2 TB
15 Days
12.6 × 15
≈ 189 TB
30 Days
12.6 × 30
≈ 378 TB
60 Days
≈ 756 TB
90 Days
≈ 1.13 PB (Petabyte)
Storage Summary
| Recording Days | Approximate Storage |
|---|---|
| 7 | 88 TB |
| 15 | 189 TB |
| 30 | 378 TB |
| 60 | 756 TB |
| 90 | 1.13 PB |
Note: Actual storage requirements vary with scene complexity, motion levels, recording schedules, and whether H.265+ is enabled. Motion-based recording or H.265+ can significantly reduce storage needs.
Step 10 – RAID Planning
| Number of Drives | RAID |
|---|---|
| 2 | RAID 1 |
| 4 | RAID 5 |
| 6 | RAID 6 |
| 8 | RAID 6 |
| 12 | RAID 10 (performance) or RAID 6 (capacity) |
For enterprise deployments, RAID helps protect recordings from disk failures.
Step 11 – Fiber Bandwidth
Each floor
120 Mbps
Recommended Fiber:
1 Gbps
Future Expansion
10 Gbps
using compatible SFP+ optics and switching hardware.
Step 12 – Cisco Core Capacity
The Cisco Catalyst C9300X-24Y supports switching capacities far beyond the traffic generated by this example, making it suitable for enterprise surveillance with room for future growth.
Step 13 – Bandwidth Optimization
Enable:
- H.265+
- Variable Bit Rate (VBR)
- Smart Codec (if supported)
- Motion Detection Recording
- Region of Interest (ROI)
These features reduce bandwidth and storage without significantly affecting important image quality.
Step 14 – Enterprise Example
| Device | Quantity |
|---|---|
| IP Cameras | 300 |
| 48-Port PoE Switches | 9 |
| Cisco Catalyst C9300X-24Y | 1 |
| Gigabit Monitoring Switch | 1 |
| Fiber ODF | 10 |
| 64CH NVR | 4 |
| 32CH NVR | 1 |
| LCD Monitors | 5–9 |
Bandwidth Summary
| Item | Traffic |
|---|---|
| Single Camera | 4 Mbps |
| 30 Cameras (One Floor) | 120 Mbps |
| 60 Cameras (One NVR) | 240 Mbps |
| 300 Cameras | 1.2 Gbps |
Storage Summary
| Recording Period | Required Capacity |
|---|---|
| 7 Days | 88 TB |
| 15 Days | 189 TB |
| 30 Days | 378 TB |
| 60 Days | 756 TB |
| 90 Days | 1.13 PB |
Best Practices
- Use H.265+ whenever supported.
- Separate CCTV traffic using dedicated VLANs.
- Use CAT6 from cameras to switches.
- Use Single-Mode Fiber (OS2) between floors.
- Monitor uplink utilization on the Cisco Core Switch.
- Leave at least 20–30% spare bandwidth for future expansion.
- Choose enterprise-grade surveillance hard drives designed for continuous recording.
- Test recording retention after deployment to confirm real-world storage usage.
Enterprise CCTV Data Flow
Hikvision IP Camera │ CAT6 │ 48-Port PoE Switch │ SFP Module │ Single-Mode Fiber │ Main ODF │ Cisco Catalyst C9300X-24Y │ 24-Port Gigabit Switch │ Hikvision NVR │ Video Wall
Conclusion
Accurate bandwidth and storage planning is the foundation of a successful enterprise CCTV deployment. By calculating camera bitrates, switch uplinks, fiber capacity, NVR throughput, and storage requirements before installation, you can avoid bottlenecks, reduce unexpected costs, and ensure reliable long-term operation.
For a 300-camera enterprise project, a design based on CAT6 access cabling, Single-Mode Fiber uplinks, a Cisco Catalyst C9300X-24Y Core Switch, and properly sized Hikvision NVR storage provides a scalable and maintainable solution.
📘 Next Tutorial Enterprise CCTV IP Series
Enterprise CCTV IP Addressing & VLAN Design with Cisco Catalyst C9300X-24Y
In this tutorial cover the following Topics :
- IP addressing strategy for 300 cameras
- VLAN design for each floor
- Subnet calculations
- Gateway planning
- DHCP vs Static IP
- Camera naming conventions
- Cisco VLAN configuration
- Inter-VLAN routing
- Network security best practices
- Complete IP planning table for all 300 cameras
This tutorial will be one of the most valuable in your series because every enterprise CCTV project depends on a well-planned IP addressing and VLAN structure.
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