400G & 200G AI Networking
MikroTik's 400G-class switches anchor the spine of an AI or data-centre fabric. Below are the SYNOXX 400G QSFP-DD cables and optics — and related 200G/50G breakout — grouped by type and shown with the MikroTik switches they connect.
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Type
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Reach
Direct attach copper (DAC) cables
✓ Tested compatibility
SYNOXX cable / transceiver
Breakout cables
400G → 2×200G breakout
✓ Tested compatibilitySplits one 400G port into two 200G QSFP56 links on the CRS812's 200G QSFP56 ports.
SYNOXX cable / transceiver
Works with these MikroTik devices
400G → 4×100G breakout
✓ Tested compatibility100G branches use 2×50G PAM4 lanes — matched to the CRS812's QSFP56 ports in 100G mode (not conventional 100G QSFP28 4×25G NRZ ports).
SYNOXX cable / transceiver
Works with these MikroTik devices
400G → 8×50G breakout
✓ Tested compatibilitySplits one 400G port into eight 50G SFP56 links on the CRS812's 50G SFP56 ports.
SYNOXX cable / transceiver
Works with these MikroTik devices
Optical transceivers
✓ Tested compatibility
SYNOXX cable / transceiver
- Port counts and supported modes vary by device and RouterOS version — confirm against each device's current MikroTik datasheet.
- For any breakout, both the source port mode and every destination port must support the same electrical lane configuration.
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- Page: 400G & 200G AI Networking (/ai-networking/400g-200g/)
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Compatible with MikroTik — and most well-known vendors
SYNOXX DAC cables and transceivers are coded and tested for broad compatibility across major platforms — MikroTik, NVIDIA (Mellanox), Cisco, Arista, Juniper, Ubiquiti and more. Tell us your devices and the link you’re building, and our team will confirm the right SYNOXX parts.