| NO. | Brand | Compatible P/N | Remarks |
| 1 | Cisco | QSFP-100G-CU1M | |
| 2 | Arista Networks | CAB-Q-Q-100G-1M | |
| 3 | Brocade | 100G-Q28-Q28-C-0101 | |
| 4 | Huawei | QSFP28-100G-CU1M | |
| 5 | Juniper | QFX-QSFP28-DAC-1M | |
| 6 | HPE(BladeSystem) | 845404-B21 |
The 100G QSFP28 DAC cable is HPE BladeSystem compatible and equivalent to HPE BladeSystem 845404-B21. 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.
HPE Virtual Connect Modules: Virtual Connect SE 100Gb F32 Module for Synergy, HPE Virtual Connect FlexFabric-20/40 F8 Module
HPE Synergy Frame Components: Synergy 12000 Frames equipped with 100GbE master/satellite interconnect modules.
HPE BladeSystem Enclosures: c7000 and c3000 Enclosures utilizing 100G uplink modules.
HPE ProLiant DL/ML Series: DL380 Gen10, DL360 Gen10, DL560 Gen10, and Gen11 variants using HPE StoreFabric or Ethernet 100Gb adapters.
HPE Apollo Systems: High-density compute nodes configured with 100G QSFP28 network slots.
Blade-to-Top-of-Rack Connectivity: Connecting HPE BladeSystem c7000 or Synergy enclosures directly to top-of-rack leaf switches.
High-Density Server Aggregation: Providing ultra-short 100G patch links between HPE ProLiant blade servers and core network fabrics.
Enclosure Interconnect Stacking: Linking HPE Virtual Connect modules together within or across chassis to scale internal bandwidth.
Low-Latency Storage Clustering: Connecting high-throughput blade architectures to NVMe or flash-based storage area networks (SANs).
| HPE BladeSystem Compatible | 845404-B21 | Vendor Name | HYTOPTODEVICE |
| Connector | QSFP28 to QSFP28 | Max Data Rate | 100Gbps |
| Cable Length | 1m (3.3ft) | AWG | AWG 30 |
| Jacket Material | PVC(OFNR) | Minimum Bend Radius | 35mm |
| Operation Temperature | 0~ 70 °C (32 to 158°F) | Protocols | 100 Gigabit Ethernet |
Q1: Is this passive DAC cable fully compatible with official HPE Networks hardware? A1: Yes. It is pre-programmed with HPE-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 HPE 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: Does this 100G DAC cable support breakout into 4x 25G channels? A3: No. The HPE 845404-B21 is a direct attach copper cable, its connector type is QSFP28 to QSFP28 with 100G-to-100G link connectivity. For 4x 25G breakout, you will need a QSFP28 to 4x SFP28 breakout DAC.
Q4: What is the maximum distance supported by the 845404-B21? A4: As designated by the "1M" in the part number, the maximum physical length of this copper cable is 1 meter (3.3 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 HPE(BladeSystem) 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 1-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 HPE switch shows an "unsupported transceiver" error? A9: Ensure your switch is running updated firmware. If the message persists, you can bypass it on HPE 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.
