The Cisco DAC-QSFP28-4SFP28-25G breakout cable is a high-performance interconnect solution designed to bridge the gap between 100G core switch ports and 25G server or access switch ports. At SKYRS Pakistan, we provide these high-density cables to optimize data center footprints and significantly reduce power consumption compared to optical transceivers.
The QSFP-4SFP25G-CU series consists of passive copper direct-attach breakout cables. They feature a single QSFP28 connector (100G) on one end that “breaks out” into four individual SFP28 connectors (25G each) on the other. This allows a single 100G switch port to communicate with four separate 25G servers or switches, maximizing port density.
| Feature | Specification |
| Connector A | 1 x QSFP28 (100 Gbps) |
| Connector B | 4 x SFP28 (25 Gbps each) |
| Cable Type | Passive Copper Twinax |
| Data Rate | 100 Gbps aggregate (25.78 Gbps per lane) |
| Impedance | 100 Ohms |
| Operating Temp | 0°C to 70°C (Standard Case) |
| Compliance | IEEE 802.3bj, SFF-8402, SFF-8665 |
| Power Consumption | Max 0.1W (Passive design) |
SKYRS maintains a comprehensive inventory of length variants to suit different rack layouts in Pakistani data centers:
QSFP-4SFP25G-CU1M: 1-meter length (Ideal for within-rack server-to-switch patching).
QSFP-4SFP25G-CU2M: 2-meter length (For adjacent rack connectivity).
QSFP-4SFP25G-CU3M: 3-meter length (Standard for top-of-rack to middle-of-rack).
QSFP-4SFP25G-CU5M: 5-meter length (Extended reach for larger deployments).
Active Optical (AOC) Variants: For distances beyond 5m, we offer QSFP-4SFP25G-AOC variants (up to 30m) upon request.
SKYRS provides professional on-site deployment for these high-speed interconnects across major hubs like Karachi, Lahore, and Islamabad.
QSFP28 End: Plug the 100G end into the high-speed uplink/backbone port of your Cisco Nexus or Catalyst 9000 switch.
Breakout End: Route the four SFP28 tails to the 25G NICs of your servers (e.g., Cisco UCS, Dell PowerEdge) or 25G access switches.
Bend Radius: Our installers ensure a minimum bend radius of 25mm to 30mm to prevent signal degradation.
Cisco switches usually auto-detect the breakout cable, but SKYRS engineers perform the following essential “Day 0” logic:
Port Channeling: Grouping the breakout ports for redundancy if required.
FEC Configuration: Adjusting Forward Error Correction (Base-R FEC or RS-FEC) based on the cable length to ensure error-free 25G links.
Link Verification: Testing each of the four 25G lanes for 100% throughput and zero packet loss.
SKYRS is the exclusive destination for tested and verified Cisco 100G-to-25G breakout solutions in the local market:
Ready Stock: Immediate dispatch for 1M, 2M, and 3M variants.
Compatibility Guarantee: Verified to work with Catalyst 9500/9600 and Nexus 3000/9000 series switches.
Technical Warranty: Local SKYRS warranty support for all passive and active cable assemblies.
Skyrs is the only vendor in Pakistan offering specialized best Cisco DAC-QSFP28-4SFP28-25G switches server equipment for call center call centre in pakistan. We support software houses with high-performance cisco DAC-QSFP28-4SFP28-25Gswitches server units for switches servers zoom ringcentral connectivity. Our experts facilitate seamless cisco switches server Migration for growing enterprises and large data centers across the region.
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The DAC-QSFP28-4SFP28-25Gswitches server throughput limit ensures maximum 100G-to-25G data efficiency. Download the DAC-QSFP28-4SFP28-25G switches server configuration guide to optimize your local network stack. Secure your hardware via DAC-QSFP28-4SFP28-25G switches server security license activation protocols.
We provide the DAC-QSFP28-4SFP28-25G switches server rack mount kit nload for secure hardware installation. Users can also perform a DAC-QSFP28-4SFP28-25Gswitches server ROMMON update for system stability. If your workload grows, consider a cisco DAC-QSFP28-4SFP28-25Gswitches server memory upgrade.
While the DAC-QSFP28-4SFP28-25Gswitches server EOSL date 2025 is approaching, these modules remain robust. Furthermore, the cisco DAC-QSFP28-4SFP28-25Gswitches server used price 2026 offers incredible value for companies.
Cisco outperforms competitors like mikrotik, h3c, aruba, ruijie, huawei, and paloalto in reliability. Unlike mikrotik, Cisco offers superior switches server routing and automated management features. While aruba is flexible, Cisco provides better cisco switches server VLAN configuration stability. Compare technical metrics using our C3850-NM-4-10G datasheets download or the official datasheet.
Official Manufacturer Page: Cisco 100G DAC Breakout Cable Datasheet
Skyrs Internal Catalog: Buy Cisco 25G/100G Equipment at Skyrs Pakistan
How can I get a DAC-QSFP28-4SFP28-25G switches server bulk quote? Contact our sales team directly at Skyrs.com.pk for discounted pricing on volume orders.
What is the cisco switches server equipment configuration guide for VLANs? Use the console port to define VLAN IDs and assign them to breakout interfaces.
How to reset cisco switches server equipment switches server? Press and hold the Mode button for 10 seconds during the initial power-on cycle.
Where can I find the cisco switches server firmware update download? Official firmware is available on the Cisco Software Central portal for licensed users.
What is the cisco switches server KX-HDV430 PoE power budget? The DAC breakout cable is passive; please check your switch chassis for PoE specs.
Is cisco switches server Migration difficult for call centers? Skyrs provides professional migration services to ensure zero downtime for your call centre.
