MikroTik CRS812 DDQ 400G Rackmount Aggregation Switch
The MikroTik CRS812 DDQ (CRS812-8DS-2DQ-2DDQ-RM) is MikroTik's most powerful switch to date — a 1U rackmount 400G aggregation platform that makes 50G, 200G, and 400G connectivity accessible at a price point that was previously unimaginable for these speeds. It combines 8× 50G SFP56, 2× 200G QSFP56, and 2× 400G QSFP56-DD ports with full breakout mode support down to 1G/2.5G/5G/10G/25G/50G, a quad-core 2 GHz ARM64 AL52400 CPU, Marvell 98DX7335 switch chip, 4 GB RAM, dual redundant hot-swap PSUs, 4× hot-swap cooling fans, and RouterOS v7 License Level 6 — all at USD 1,295. Top-of-rack leaf, campus core, service provider aggregation, AI cluster fabric, or media workflow backbone — the CRS812 DDQ is built for all of them.
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The MikroTik CRS812 DDQ (CRS812-8DS-2DQ-2DDQ-RM) is the switch that rewrites the entry price for 400G networking. For years, 400G meant six-figure budgets, vendor lock-in, and proprietary management software. The CRS812 DDQ delivers the same port speeds at USD 1,295 — with a RouterOS v7 feature stack that has been trusted in millions of deployments worldwide, and the operational simplicity of a platform your team already knows.
The port mix is the standout feature. Eight 50G SFP56 ports cover the server tier — fast enough for NVMe-over-Fabrics, GPU cluster interconnects, and high-throughput NAS workloads. Two 200G QSFP56 ports handle mid-tier aggregation or spine uplinks. Two 400G QSFP56-DD ports connect to the highest-bandwidth spine switches, core routers, or peer devices in the same tier. Every QSFP56 and QSFP56-DD port supports breakout mode — fan one 400G port out to 8× 50G, or one 200G port out to 4× 50G — giving you extraordinary port density flexibility without additional hardware.
The Marvell 98DX7335 switch chip handles hardware-level switching, routing offload, and traffic management with the efficiency expected of a purpose-built silicon solution at this tier. The quad-core AL52400 ARM64 CPU at 2 GHz with 4 GB RAM provides the compute headroom for full RouterOS v7 routing, advanced firewall rules, BGP/OSPF, MPLS, VLAN management, traffic shaping, SNMP monitoring, and scripted automation — simultaneously, without compromise.
Dual redundant hot-swap PSUs and 4× hot-swap cooling fans mean the CRS812 DDQ is designed for 24/7 production environments where downtime is not an option. Both PSU and fan modules can be replaced live — no restart, no service interruption. The G1251-0250WNA is the official replacement PSU for this platform.
Key features:
- 2× 400G QSFP56-DD ports — 400G full-duplex; breakout to 8× 50G or 2× 200G
- 2× 200G QSFP56 ports — 200G full-duplex; breakout to 4× 50G
- 8× 50G SFP56 ports — 50G full-duplex server tier connectivity
- All QSFP56/QSFP-DD ports support breakout modes: 1G / 2.5G / 5G / 10G / 25G / 50G
- 2× 1G/10G Ethernet ports — 10M/100M/1G/10G management or in-band connectivity
- Marvell 98DX7335 switch chip — advanced hardware switching and L3 offloading
- Quad-core AL52400 ARM 64-bit CPU, 2,000 MHz, 4 GB RAM, 512 MB NAND
- Dual redundant hot-swap AC power supplies — 100–240V, 50–60 Hz, 2× PSU slots
- 4× hot-swap cooling fans — live replacement, no restart required
- Max power consumption 134W (81W without attachments)
- RJ45 serial console port for out-of-band management
- CPU temperature, PCB temperature, and voltage monitoring
- RouterOS v7, License Level 6 — BGP, OSPF, MPLS, advanced firewall, traffic shaping, SNMP, scripting — no subscriptions, no locked features, free updates for life (minimum 5 years)
- Certified CE, EAC, RoHS | IP20
- Tested ambient temperature -10°C to +50°C, MTBF ~200,000 hours at 25°C
Compatible accessories (sold separately):
- DDQ+DA0001 — QSFP-DD 400G DAC 1m (USD 79)
- DDQ+DA0003 — QSFP-DD 400G DAC 3m (USD 109)
- DDQ+85MP01D — QSFP-DD 400G SR8 optical module, up to 100m (USD 159)
- G1251-0250WNA — 250W hot-swap replacement PSU (USD 79)
In the box: 2× IEC cords, rackmount rear support ears (2/2), rackmount ears (CRS), K-82 fastening set.
Ideal for: top-of-rack and leaf switching with 400G spine uplinks, campus core networks bridging 10G legacy infrastructure with modern 50G server tiers, service provider aggregation nodes, AI/GPU cluster east-west fabric, media production workflows with high-throughput storage requirements, and any environment where 400G connectivity at an accessible price point is the next logical infrastructure upgrade.
- Product code
- CRS812-8DS-2DQ-2DDQ-RM
- CPU architecture
- ARM 64bit
- CPU
- Quad-Core AL52400 2000 MHz
- Switch chip model
- 98DX7335
- Operating System
- RouterOS v7, License level 6
- Size of RAM
- 4 GB
- Storage size
- 512 MB, NAND
- Dimensions
- 443 x 268 x 44 mm
- Operating Temperature
- -10°C to +50°C
- RAM type
- DDR4
- Number of 1G/2.5G/5G/10G Ethernet ports
- 2
- Number of 50G SFP56 ports
- 8
- Number of 200G QSFP56 ports
- 2
- Number of 400G QSFP56-DD ports
- 2
General information
All students who attend the Training can receive a free L4 license from MikroTik. Training should be at least three days long.
Students are allowed to take the certification test ONLY upon the attendance of individual training course, in the class, under the supervision of a MikroTik Certified Training Partner.
Each certification test consists of a pre-defined % of random questions (multiple choice and true/false) from specific question categories. Items also have a difficulty parameter. MTCNA test is generated from more straightforward questions, Advanced tests – from more difficult questions.
Only one attempt is allowed. The test must be finished within one hour. The passing grade is set to 60%. There are 25 questions in the exam.
Certificate numbers and RouterOS L4 licenses are assigned automatically by MikroTik. Students can see their certificates and generate license keys once logged into the account server. Printed documents from MikroTik cost USD 30 per piece. Shipping is not included.
Remote training sessions and certification exams are not allowed.
MikroTik Certification Test without prior attendance of particular MikroTik Training Session is not allowed.
Wireless Netware offers every participant a free RouterBOARD hAP-ac-lite.
The price includes class attendance, course materials, coffee breaks and lunch, "Only for local Training." The amount does not cover travel and accommodation expenses.
Please bring (very important): Laptop, power extension strip (10ft./3m) with five sockets, one long Ethernet cable (16ft./5m+) and several short Ethernet cables.
Cost: Early bird price for the course is $850. It is valid 15 days before the scheduled session, referring to the MikroTik Training website. The price will be $1050 after the early bird date. The price includes class attendance, course materials, coffee breaks and lunch," Only for local Training." The amount does not cover travel and accommodation expenses. Seating is limited to only four students. The seat is reserved and guaranteed just after the payment is received in full amount.
Certificates will only be valid for three years.
Become a consultant: It's simple if you have MTCNA (score 75%+) and at least one valid MikroTik Engineer level certificate (MTCRE, MTCWE, MTCTCE, MTCUME or MEDICINE) with score 75%+, apply by email with your mikrotik.com account name and fields of expertise and MikroTik will add you to the list. To stay on the consultant list, you will have to have valid certificates, participate in the MikroTik Forum and attend the ...M.U.M. events in your country conducting RouterOS case studies or workshops for the rest of the attendees.
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