Core Switch for Small Surveillance Network

For a small IP surveillance network with 100 Mbps cameras and PoE requirements, a Gigabit core switch with sufficient backplane bandwidth and uplinks is recommended to ensure smooth video streaming and future scalability.Core Switch NecessityA core switch serves as the central hub in a network, connecting multiple access switches and handling high-speed data exchange between cameras and network video recorders (NVRs) efficiently . For small networks with fewer than 32 cameras, a core switch may not be strictly necessary. However, for networks with 32 or more cameras, using a core switch is recommended to prevent video lag and ensure reliable performance .Key ConsiderationsBandwidth: Calculate the total bandwidth required by all cameras. For example, 160 cameras at 5 MP and 30 fps may generate around 1.3 Gbps of traffic. The core switch uplinks should exceed this to avoid congestion .Uplink Speed: Ensure 1 Gbps or higher uplinks from access switches to the core switch. For future-proofing, consider 10 Gbps uplinks if the network may expand .PoE Support: While the core switch typically does not provide PoE, access switches must support PoE or PoE+ to power cameras via Ethernet .Port Count: The core switch should have enough ports to connect all access switches. For small networks, a 24- or 48-port Gigabit switch is usually sufficient .Backplane Capacity: Choose a switch with a high backplane bandwidth to handle simultaneous traffic from multiple access switches without packet loss .Recommended SetupAccess Layer: PoE+ switches (e.g., Cisco SG-300-28MP or similar) to connect cameras and provide power .Core Layer: Managed Gigabit switch (e.g., Cisco Catalyst 3850 or equivalent) with sufficient uplinks to NVRs and high backplane capacity .Uplink Configuration: Aggregate multiple uplinks if needed to increase throughput and redundancy.Practical TipsUse Cat 6 cabling for longer distances and multi-stream cameras to maintain signal quality over time .Consider future expansion by selecting switches with extra ports and higher PoE budgets .Monitor network traffic and ensure the core switch can handle peak loads without video drops .By following these guidelines, a small surveillance network can achieve reliable live view and recording performance, while remaining scalable for future camera additions.