MikroTik CRS804-4DDQ Cloud Router Switch

Description

400G Switching at an Accessible Price Point

The CRS804-4DDQ is a compact and reliable 400 Gigabit switch designed for modern AI workloads and next-generation network upgrades, delivering exceptional bandwidth density in a quiet and efficient 1U form factor. Until recently, 400G switching was the exclusive domain of high-end vendors with equally high-end price tags. The CRS804-4DDQ changes that — bringing MikroTik’s proven RouterOS ecosystem to a class of performance previously out of reach for most organisations.

Key Highlights

• 4× 400G QSFP56-DD ports and 2× 1G/10G Ethernet RJ45 management/uplink ports
• Marvell 98DX7335 switch chip with quad-core 2.0GHz ARM64 CPU, 4GB DDR4 RAM, and 512MB NAND storage
• RouterOS v7 with License Level 6 — full Layer 2 and Layer 3 feature set
• Approximately 200,000 hours MTBF at 25°C

Flexible Breakout & High-Density Connectivity

Each 400G QSFP56-DD port is built from eight independent data lanes, enabling flexible breakout options including two 200G links for AI workloads or lower-speed connections such as 100G or 40G. This makes the CRS804-4DDQ equally capable as a spine or aggregation device in existing infrastructure, connecting to a mix of 400G, 200G, 100G, 40G, and even lower-speed breakout links within the same deployment.

• Per-port support for 40G, 50G, 100G, 200G, and 400G speeds
• Breakout to 1G, 2.5G, 5G, 10G, 25G, and 50G via QSFP-DD breakout cables
• Non-blocking wire-speed performance across all ports
• Functions as a core, aggregation, or spine device within modern network fabrics

Enterprise Reliability & Efficient Power Design

Dual hot-swap power supplies are included for redundancy, ensuring uninterrupted operation in critical environments. Efficient cooling and optimised power design keep energy usage low, with maximum consumption reaching only 123W even under full load with optics installed. The switch operates reliably across a wide ambient temperature range, making it suitable for data centres, research labs, and edge compute deployments alike.

• Dual hot-swap AC power inputs (100–240V) for full power redundancy
• Maximum power consumption of 123W under full load; 92W without attachments
• Dual cooling fans with optimised airflow design
• Operating temperature: -10°C to +60°C

Half-Rack Form Factor & Space Efficiency

With the included RMK-2×10/19 accessory, two CRS804 switches can be mounted side-by-side in a single 1U slot of a standard 19-inch rack, maximising rack space efficiency. This makes the CRS804-4DDQ an exceptionally space-efficient choice for high-density data centre environments where rack space is at a premium.

• Compact half-rack 1U form factor
• Two units mountable side-by-side in a standard 19″ 1U rack slot using included accessory
• Standard 19″ rack compatible via included mounting hardware

RouterOS v7 — Full Layer 2 & Layer 3 Management

RouterOS v7 (License Level 6) provides full Layer 2 and Layer 3 capabilities with future-ready networking features, including VLAN management, routing, firewall rules, ACLs, quality of service, and traffic shaping — all in MikroTik’s familiar management environment. The switch is manageable via Winbox, WebFig, CLI (SSH/Telnet), and SNMP, integrating naturally into existing MikroTik-managed infrastructure.

• Full Layer 2 and Layer 3 capabilities under RouterOS v7 (License Level 6)
• VLAN trunking, routing, ACLs, QoS, and traffic shaping
• Manageable via Winbox, WebFig, CLI (SSH/Telnet), and SNMP
• CPU, PCB, and voltage monitoring for proactive network health management

 

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