| NO. | Brand | Compatible P/N | Remarks |
| 1 | Cisco | QSFP-100G-CU2M | |
| 2 | Arista Networks | CAB-Q-Q-100G-2M | |
| 3 | Brocade | 100G-Q28-Q28-C-0201 | |
| 4 | Huawei | QSFP28-100G-CU2M | |
| 5 | Juniper | QFX-QSFP28-DAC-2M | |
| 6 | Dell | DAC-Q28-100G-2M |
The 100G QSFP28 DAC cable is Juniper compatible and equivalent to Juniper QFX-QSFP28-DAC-2M. It provides a highly cost-effective, short-distance 100 Gigabit link between QSFP28 ports. It is a Copper Twinax Cable ,designed for 100Gb/s high-speed interconnecting network applications. Ideal for data centers, high-performance computing, and enterprise core layers.
QFX Series Data Center Switches: QFX5110-32Q, QFX5120-48Y, QFX5200-32C, QFX5210-64C, QFX10002-72Q
EX Series Enterprise Switches: EX4650-48Y, EX4400-24X (using 100G uplink modules), EX9200 (with high-density 100G line cards)
PTX Series Packet Transport Routers: PTX10001-36MR, PTX10003, PTX10008
MX Series 5G Universal Routing Platforms: MX204, MX480, MX960, MX2010 (equipped with MIC/MPC cards supporting 100G QSFP28)
Mainstream Server NICs (For Top-of-Rack Downlinks)：
NVIDIA / Mellanox: ConnectX-4 Dx / ConnectX-5 / ConnectX-6 (100G Single/Dual-port NICs)
Intel: E810-CQDA2 (100G Ethernet Network Adapter)
Broadcom: NetXtreme-E Series 100G PCIe NICs
Top-of-Rack (ToR) Leaf-to-Server Links: Directly connecting Juniper leaf switches to high-performance servers and storage arrays within the same rack.
Switch Stacking & Virtual Chassis: Linking adjacent Juniper switches together to form a single, logical Virtual Chassis or Virtual Chassis Fabric (VCF).
Data Center Interconnect (DCI) Bricks: Providing localized, high-speed 100G patch links between spine switches and distribution routers.
Ultra-Low Latency Core Compute: Delivering point-to-point connections with near-zero latency for edge computing, AI inferencing, and cloud architectures.
| Juniper Compatible | QFX-QSFP28-DAC-2M | Vendor Name | HYTOPTODEVICE |
| Connector | QSFP28 to QSFP28 | Max Data Rate | 100Gbps |
| Cable Length | 2m (7ft) | AWG | AWG 26 |
| Jacket Material | PVC(OFNR) | Minimum Bend Radius | 50mm |
| Operation Temperature | 0~ 70 °C (32 to 158°F) | Protocols | 100 Gigabit Ethernet |
Q1: Is this passive DAC cable fully compatible with official Juniper Networks hardware? A1: Yes. It is pre-programmed with Juniper-compatible EEPROM code, allowing it to be recognized instantly by Juniper devices without triggering "Unsupported Transceiver" warnings.
Q2: Can I use this DAC cable to connect a Juniper switch to a switch from another brand? A2: Yes, but you need a "dual-compatible" version where one end is coded for Juniper and the other end is coded for the other brand (e.g., Cisco, Dell, or HPE).
Q3: Can this 2-meter cable be used as a 4x25G breakout cable? A3: A: No. The QFX-QSFP28-DAC-2M is a straight 100G-to-100G interconnect cable. If your application requires splitting a 100G QSFP28 port into four 25G SFP28 ports, you must use a dedicated breakout cable (e.g., part number: QFX-QSFP28-4C25G-DAC-2M).
Q4: What is the maximum distance supported by the QFX-QSFP28-DAC-2M? A4: As designated by the "2M" in the part number, the maximum physical length of this copper cable is 2 meter (6.6 feet), ideal for intra-rack setups.
Q5: Does this passive cable require any software configuration to run? A5: No, the DAC cable is completely plug-and-play. Once plugged into a compatible Juniper QSFP28 port, the link will automatically boost the line speed to 100Gbps.
Q6: What is the gauge of the copper wire used in this cable? A6: This 2-meter cable typically utilizes high-quality 30AWG or 28AWG premium twinaxial copper wire to minimize insertion loss and maintain structural flexibility.
Q7: Can this cable be used in regular SFP+ or SFP28 ports? A7: No. This cable features QSFP28 connectors at both ends and is strictly physically and electrically compatible only with 100G QSFP28 or QSFP56 ports.
Q8: Does this passive DAC cable consume a lot of power? A8: Not. our Direct Attach Copper (DAC) cables are passive and consume near-zero power (<0.1W per end), that is far more energy-efficient than fiber optical transceivers or AOCs.
Q9: What should I do if my Brocade switch shows an "unsupported transceiver" error? A9: Ensure your switch is running updated firmware. If the message persists, you can bypass it on Juniper networks by entering the global configuration commands: service unsupported-transceiver and no errdisable detect cause gbic-invalid.
Q10: Is it safe to hot-plug this cable while the switch is running?A10:Yes. The DAC cable use standard hot-pluggable connectors. You can insert or remove it without disrupting network traffic on other active ports.
HYTOPTODEVICE has supplied over 200,000 passive Direct Attach Copper(DAC) cable to data centers and enterprise networks across 100+ countries since 2011. Every passive DAC cable undergoes comprehensive 100% performance, signal integrity, and compatibility testing before shipment。
"We replaced 100 Cisco-branded DACS with HYTOPTODEVICE equivalents across our spine layer — zero compatibility issues, 40% cost reduction."— Network Architect, Tier-2 ISP, England
Quality Certification & Compliance：
At HYTOPTODEVICE, our quality commitment is backed by industry-standard validations. From passive DAC cable manufacturing to final inspection, our processes ensure global compliance and reliability.
We adhere to rigorous standards for our passive DAC cable and network solutions:
ISO 9001: Certified quality management and production consistency.
CE & FCC: Fully compliant for seamless Global Market Access.
RoHS: Committed to environmental responsibility and hazardous material control.
Proven Reliability: Rigorous testing to reduce compliance risk and ensure safety.
Certified Quality. Global Standards. Guaranteed Performance.
