Network Attached Storage: A Networking Perspective

A NAS (Network Attached Storage) device lives and dies by its network connection. You can install the fastest NVMe drives and the most powerful processor, but if your network bottlenecks the connection, you'll never see those speeds. Here's how to ensure your networking infrastructure keeps up with your storage.

The Gigabit Bottleneck

Standard gigabit Ethernet maxes out at roughly 110–115 MB/s of real-world throughput. That's fine for streaming a few 4K videos, but it becomes a painful bottleneck when you're backing up terabytes of data, editing video files directly from the NAS, or running virtual machines from network storage.

Modern NAS devices from Synology, QNAP, and Asustor now include 2.5 GbE or even 10 GbE ports as standard. To take advantage of these faster connections, your network needs to match.

Upgrading to Multi-Gigabit

2.5 Gigabit Ethernet is the most practical upgrade path for most users. It delivers roughly 280 MB/s of real-world throughput — more than double gigabit — while running over the same Cat5e or Cat6 cables you likely already have. 2.5 GbE switches have dropped significantly in price, with 5-port models available for under $50.

For users who need maximum performance, 10 GbE provides roughly 1,100 MB/s of throughput. However, 10 GbE switches remain expensive ($200+ for basic 4-port models), and you'll need Cat6a cabling for runs over a few meters. This makes sense for dedicated editing workstations or home lab environments where the NAS serves as primary storage.

Link Aggregation

If your NAS and switch both support link aggregation (LACP), you can bond two or more gigabit ports together. This doesn't speed up a single file transfer, but it increases aggregate throughput when multiple devices access the NAS simultaneously. It's a free performance boost if you have the ports available.

Remote Access Networking

Accessing your NAS remotely requires careful networking. Most NAS vendors offer relay services (Synology QuickConnect, QNAP myQNAPcloud) that work without port forwarding, but performance is limited by the relay server's bandwidth. For better speeds, configure a VPN on your router or NAS that lets you connect directly to your home network from anywhere.

Never expose your NAS directly to the internet by port-forwarding its web interface. NAS devices have been frequent targets for ransomware attacks. Always use a VPN or relay service for remote access.

Network Configuration Tips

• Assign your NAS a static IP address or a DHCP reservation to prevent address changes
• Place the NAS on the same switch as your most frequent users to minimize hops
• Enable jumbo frames (9000 MTU) on both the NAS and switch for large file transfers — but only if all devices on that VLAN support it
• If using VLANs, ensure the NAS is accessible from the VLANs that need it via proper routing rules