MikroTik CRS328-4C-20S-4S+RM 28-Port Layer 3 Smart Cloud Router Switch

The MikroTik CRS328-4C-20S-4S+RM is a versatile and enterprise-grade Layer 3 smart switch built to handle the demands of high-performance networking environments. Featuring a total of 28 ports—including 20 dedicated SFP ports, 4 high-speed SFP+ ports, and 4 combo ports that allow the use of either SFP or RJ45 Ethernet—this switch provides unmatched flexibility and scalability. Designed for businesses, data centers, and ISPs, it delivers reliable throughput, robust software control, and hardware redundancy, all packed into a compact 1U rackmount chassis.

Product Features

28-Port High-Density Design

This switch offers a total of 28 independent interfaces for fiber and copper networking:

• 20 × 1 Gbps SFP ports for standard fiber uplinks
• 4 × 10 Gbps SFP+ ports for high-throughput fiber connections
• 4 × combo ports configurable for either SFP or 1G RJ45 Ethernet, allowing network design flexibility

Flexible Combo Port Configuration

The CRS328 allows all eight combo port interfaces to be physically connected. Administrators can define—through software scripting—which four ports are active, optimizing bandwidth and connectivity in real time.

Dual Boot Operating System

Choose between MikroTik RouterOS for full Layer 3 routing capabilities, or SwOS for a lighter, user-friendly switch interface. Switch easily between operating systems through RouterBOOT or the management GUI.

Redundant AC Power Supply

The switch includes dual AC power inputs (100–240 V) with automatic failover, ensuring continuous uptime even in the event of a power supply failure—ideal for mission-critical deployments.

Rackmount Form Factor

Housed in a compact 1U metal chassis, the CRS328-4C-20S-4S+RM integrates seamlessly into standard data center and enterprise rack environments.

Advanced Management Tools

Equipped with an RJ45 console port for low-level configuration and debugging, along with a customizable mode button that can trigger RouterOS commands such as scripts or configuration backups.

Product Specifications

• Product code: CRS328-4C-20S-4S+RM
• Dimensions: 443 mm × 200 mm × 44 mm (17.4 × 7.9 × 1.7 in)
• Weight: 2.45 kg (5.39 lbs)
• CPU: 98DX8216 at 800 MHz (dual-core)
• RAM: 512 MB
• Storage: 16 MB flash
• Operating systems: RouterOS (Level 5 license) / SwOS (dual boot)
• Cooling: Passive and active cooling system
• Operating temperature: –40°C to +70°C
• MTBF: Approximately 200,000 hours at 25°C
• Certifications: CE, EAC, RoHS
• Ingress protection: IP20

Network Interfaces

• 20 × 1G SFP ports
• 4 × 10G SFP+ ports
• 4 × combo ports (each usable as either 1G SFP or 1G RJ45)
• RJ45 serial console port

Powering and Redundancy

• Dual 100–240 V AC power supplies with automatic failover
• Max power consumption: 43 W
• Power redundancy: Supported

Key Applications

• Enterprise Networks: Supports VLANs, bandwidth shaping, link aggregation, and advanced Layer 2/3 switching
• Data Centers: High-density fiber interfaces and redundant power ensure reliable uptime
• Service Providers: Ideal for aggregation points, BGP/OSPF routing, and 10G backbone deployment

Advantages

• Flexible Connectivity: Combo ports support both fiber and Ethernet, configurable via scripting
• Dual Operating Systems: Adapt to varied networking needs with either RouterOS or SwOS
• Redundant Power Supply: Eliminates single points of failure with seamless power failover
• Advanced Scripting and Management: Customize behavior with RouterOS tools or simplified SwOS GUI
• Scalable and Rack-Ready: High port density in a 1U form factor for professional installations