Support

Static IP vs DHCP for CCTV Systems

The best IP strategy for CCTV depends on the size of the site and who has to support it later. DHCP is not automatically wrong, and static IP is not automatically better. The real goal is a stable network path that the next technician can understand.

CCTV Networking Support

Summary

Use this guide when deciding how cameras, NVRs and network gear should be addressed on a CCTV system.

Applies to

IP camera systems
NVRs, cameras and PoE switches
Homes, businesses and multi-device CCTV sites

Difficulty and time

Difficulty: Moderate

Estimated time: 10 to 20 minutes

What you will need

Access to the router or network plan
List of cameras and recorder devices
Understanding of who will support the site later

What this guide covers

When DHCP is fine
When static IP or reservations make more sense
How router changes create CCTV issues
The practical middle ground on real jobs

The support problem usually starts after a modem or router is replaced and nobody remembers how the cameras were addressed. That is why this topic matters more than it sounds.

DHCP

DHCP is fine on many smaller sites, especially where the router is stable and the installer kept the system simple.

Good for straightforward home and small-business installs.
Easy to bring devices online quickly.
Best when the router, reservations and device list are well managed.

Static IP

Static IPs or documented reservations become more useful as the site grows, or when several devices and service providers touch the network over time.

Useful on larger or more structured sites.
Easier for long-term device tracking when documented properly.
More brittle if done badly or if the router LAN range changes later.

What usually works best

For many real jobs, DHCP with reservations gives the neatest balance. It behaves predictably without forcing every address to be typed locally into every device.

Use reservations for key devices like the NVR and important cameras if the router supports it reliably.
Keep documentation of what was assigned.
If the site already uses a managed network standard, follow that instead of inventing your own hybrid logic.

Worked example

Small office after router replacement

Situation: The CCTV app stopped working after a modem swap because the old static addressing no longer matched the new LAN range.

Solution used: The system was rebuilt onto a clean router range with documented reservations for the main devices.

Why this was chosen: It kept the system predictable without leaving it dependent on undocumented fixed addresses.

Installation notes: The best addressing method is the one the next support person can actually understand.

Common mistakes

Using static IPs without documentation.
Changing router LAN range and forgetting the camera network.
Assuming DHCP means random behaviour if reservations are available.
Mixing methods with no plan.

Related support guides

Still stuck?

Need help choosing or setting up a system? Contact SecurityWholesalers support with your order number, product model and a clear description of the issue.