QNAP QSW-M5216-1T-US 16-Port 25GbE SFP28 Managed Layer 2 Switch
Overview
The QNAP QSW-M5216-1T-US is a 1U rackmount managed switch purpose-built for high-density 25GbE fiber aggregation. With 16 SFP28 ports running at 25 Gigabit each and a single 10GbE NBASE-T copper uplink, this switch targets environments where bandwidth between servers, NAS arrays, and storage fabric has become the bottleneck — think NVR clusters, hyperconverged edge nodes, AI inference racks, or any infrastructure that has outgrown 10GbE but isn't ready to justify a full 100GbE core. Browse the full QNAP networking and storage catalog to see where this switch fits in a larger infrastructure build.
Key Features
- 16 × 25GbE SFP28 Fiber Ports: Each port delivers 25Gbps, giving you 400Gbps of raw edge bandwidth before you even factor in the uplink. SFP28 is backward-compatible with SFP+ 10GbE transceivers, so you can phase in the upgrade without replacing all your cabling at once — a real operational advantage when migrating a live production environment.
- 1 × 10GbE NBASE-T Copper Port: The single RJ-45 copper port accepts 10GBASE-T, 5GBASE-T, 2.5GBASE-T, and 1GbE connections depending on the transceiver or link partner — useful for connecting a management workstation, out-of-band console, or a legacy 10GbE device that doesn't have a fiber interface, without burning an SFP28 slot.
- 840 Gbps Switching Capacity / 625 Mpps Forwarding Rate: Non-blocking architecture at the aggregate port bandwidth. The 625 million-packets-per-second forwarding rate is the number that matters for latency-sensitive workloads: storage replication, NVR motion streams, and east-west cluster traffic all benefit from a switch that never drops frames under load.
- Layer 2 Managed Feature Set: Full Layer 2 management means VLANs, port mirroring, link aggregation (LACP), storm control, and flow control are all configurable — the building blocks you need to segment production traffic from management traffic and protect storage traffic from broadcast storms in a multi-tenant or mixed-use rack environment.
- 9KB Jumbo Frame Support: Jumbo frames reduce CPU overhead on endpoints doing large sequential transfers — iSCSI to a NAS, SMB multichannel between servers, or Fibre Channel over Ethernet (FCoE). If your NAS or hypervisor supports jumbo frames end-to-end, enabling them on this switch can measurably reduce CPU utilization on the endpoints.
- 32K MAC Address Table: Supports up to 32,768 learned MAC addresses — sufficient for high-density server racks with dozens of virtual machines per host, each presenting its own MAC to the network. You won't hit the MAC table ceiling in a typical rack deployment.
- 30.76W Typical Power Draw: For a 16-port 25GbE managed switch, 30.76W is a low thermal footprint. That translates directly to reduced cooling load per rack unit — meaningful when you're planning power distribution and airflow in a high-density compute row.
- Wide Input Voltage Range (100–240V AC, 50/60Hz): Ships ready for both North American and international power infrastructure. No transformer required for deployments across multiple sites or data center co-location facilities using mixed PDU voltage standards.
- Operating Temperature 0°C to 40°C: Rated for standard conditioned data center and server room environments. This is not a hardened switch — plan for controlled airflow and ambient temperature management if deploying in edge or industrial enclosures near the upper bound.
- Multi-Certification (CE, FCC, BSMI, VCCI, RCM, EAC): Carries regulatory approvals for North America, Europe, Taiwan, Japan, Australia/New Zealand, and the Eurasian Economic Union — relevant for global enterprise deployments where country-specific certifications affect procurement approval.
Integration & Compatibility
The QSW-M5216-1T-US fits naturally as the aggregation layer in a network switch infrastructure built around QNAP NAS arrays with 25GbE expansion cards (such as the QXG-25G2SF-CX4 or similar SFP28 NICs). The SFP28 port format is the current industry standard for 25GbE in server and storage environments, with transceivers available from multiple vendors — short-range (SR) multimode for within-rack and within-row connections, and long-range (LR) singlemode for inter-building links. LACP bonding lets you aggregate multiple 25GbE links from a single QNAP NAS into a logical 50GbE or 100GbE pipe to the switch, useful when a single NAS needs to saturate more than one 25GbE port.
For network video recorder deployments requiring high throughput — multi-camera 4K streams, AI-based analytics pulling raw frames, or multi-site VMS aggregation — this switch provides the bandwidth headroom to avoid frame-drop events caused by congested uplinks. Pair it with a core router or firewall via the 10GbE NBASE-T port for management-plane separation. Review a network switch selection guide if you're evaluating whether 25GbE aggregation is the right tier for your current and projected bandwidth requirements.
Frequently Asked Questions
Q: Does the QSW-M5216-1T-US support PoE (Power over Ethernet)?
A: No. The QSW-M5216-1T-US is a fiber SFP28 switch — the 16 data ports are SFP28 fiber ports and do not deliver PoE. Only the single copper 10GbE NBASE-T port exists, and PoE delivery is not documented for this model. If you need PoE for IP cameras or access points, a separate PoE switch is required in your topology.
Q: Are the SFP28 ports backward-compatible with 10GbE SFP+ transceivers?
A: SFP28 is the physical successor to SFP+ and the port cage is electrically compatible with SFP+ 10GbE transceivers in most managed switch implementations, allowing a phased migration from 10GbE to 25GbE without replacing all endpoints simultaneously. Verify transceiver compatibility with QNAP's compatibility list for this specific model.
Q: What is the switching capacity of the QSW-M5216-1T-US?
A: The QSW-M5216-1T-US has an 840 Gbps switching capacity with a 625 Mpps forwarding rate. This is a non-blocking design relative to the total aggregate port bandwidth of the 16 × 25GbE ports plus the 10GbE uplink.
Q: What Layer 2 features does this switch support?
A: The QSW-M5216-1T-US supports Layer 2 managed functions including VLAN segmentation, link aggregation (LACP), port mirroring, storm control, and flow control. It does not provide Layer 3 routing — if inter-VLAN routing is required, a Layer 3 switch or router must handle that function upstream.
Q: What are the physical dimensions and weight of the QSW-M5216-1T-US?
A: The switch measures 44.5mm (H) × 440mm (W) × 297mm (D) — a standard 1U rackmount form factor — and weighs 4.4 kg (approximately 9.7 lbs). Rail kit compatibility should be verified with QNAP's accessory documentation for your specific rack depth.
Q: What regulatory certifications does the QSW-M5216-1T-US carry?
A: The QSW-M5216-1T-US is certified for CE (Europe), FCC (North America), BSMI (Taiwan), VCCI (Japan), RCM (Australia/New Zealand), and EAC (Eurasian Economic Union). This covers the major regulatory requirements for global enterprise procurement.
The QSW-M5216-1T-US hits a specific gap in the 25GbE managed switch market: 840 Gbps non-blocking capacity in a 1U enclosure drawing under 31 watts. If you've been running QNAP NAS arrays with 25GbE expansion cards and your aggregation switch is still a 10GbE unit, you're bottlenecking at the switch fabric — and this is the direct fix without the rack-space and power penalty of a larger chassis.
Technical Highlights:
- 840 Gbps / 625 Mpps Fabric: At 16 ports × 25Gbps = 400Gbps aggregate edge bandwidth, the 840Gbps switching capacity provides the full-duplex headroom needed to avoid HOL blocking when all ports are simultaneously active — critical in storage replication scenarios where multiple hosts are reading and writing concurrently.
- 30.76W Power Draw: Most 16-port 25GbE switches in this class run 40–60W under load. The 30.76W figure means a standard 150W PDU circuit can host up to four of these switches with room to spare — relevant for high-density spine-leaf deployments where per-rack power budget is a hard constraint.
- 32K MAC Table + 9KB Jumbo Frames: The 32K MAC table accommodates large virtualized environments where each VM presents a unique MAC. Combined with 9KB jumbo frame support, iSCSI and SMB Direct workloads can run with minimal CPU interrupt overhead on both the NAS and the compute hosts.
Deployment Considerations:
- The 10GbE NBASE-T copper port is the only non-fiber interface — wire it to your management VLAN or out-of-band management network so you retain console access if a fiber transceiver fails or is misconfigured on a data port.
- Operating temperature is rated to 40°C ambient maximum — this is a data center specification, not an industrial one. Edge deployments in unconditioned telecom closets or outdoor enclosures need verified airflow and cooling before installing this unit.
For a QNAP NAS-centric storage fabric in a media production suite, a surveillance NVR aggregation rack, or an AI inference cluster with multiple 25GbE-equipped server nodes, the QSW-M5216-1T-US delivers the switching headroom to stop the aggregation layer from being the performance ceiling.
