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TechGear
Real discussions from product enthusiasts
Proxmox Driver Quirks with SFP+ DACs
Users on r/homelab reported SFP+ link drops after Proxmox driver loading. Solutions involved kernel version adjustments, like pinning to 6.5 or managing `dkms.conf` for the 6.8 kernel, to maintain stable 10Gbps connectivity.
SFP+ DAC Speed Negotiation Challenges
Connecting switches like Ruckus and Cisco with SFP+ DACs can fail if port speeds aren't explicitly configured. Even with 1Gbps capability, interface settings on both devices must match to establish a link, as auto-negotiation may not bridge the gap.
Quiet, Cool NAS Performance with DAC
In a NAS build, the 10Gtek SFP+ DAC cable enabled high-speed networking. Despite initial command-line setup needs, users praised the system's quiet operation and cool temperatures from up to 1 meter away.
Expert answers based on real user experience
10Gtek
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Key features: 10GBase-CU, 1 Meter (Note that this length includes two connectors.), 2-pair differential twinax cable, Passive, EEPROM I2C, Compatible with Cisco SFP-H10GB-CU1M, Ubiquiti, Fortinet and more, 10Gtek's automatic assembly line, assures the consistency of manufacture under the process of laser cutting, aluminum shielding stripping, isolator stripping, automatic reshaping, automatic soldering and ultraviolet ray curing. Each DAC cables take the TDR & VNA measurement..
-10%10Gtek
10Gtek [Orange Colored 10G SFP+ DAC Cable - Twinax SFP Cable for Cisco SFP-H10GB-CU2M, Ubiquiti UniFi, D-Link, Supermicro, Netgear, Mikrotik, Fortinet, 2-Meter(6.5ft)
10Gtek
10Gtek [Green Colored 10G SFP+ DAC Cable - Twinax SFP Cable for Cisco SFP-H10GB-CU0.5M, Ubiquiti UniFi, D-Link, Supermicro, Netgear, Mikrotik, Fortinet, 0.5-Meter(1.6ft)
10Gtek
10Gtek [White Colored 10G SFP+ DAC Cable - Twinax SFP Cable for Cisco SFP-H10GB-CU0.3M, Ubiquiti UniFi, D-Link, Supermicro, Netgear, Mikrotik, Fortinet, 0.3-Meter(1ft)
10Gtek
10Gtek 10GBase-T SFP+ to RJ-45 Transceiver, 10Gbe SFP+ Copper Ethernet CAT6a Module, up to 30m, for Cisco SFP-10G-T-S, Fortinet, TP-Link and More
Users in r/homelab encountered link drops after Proxmox loaded network drivers, particularly with older kernel versions like 5.19.9 and 5.20.3. Some users found success by pinning to the 6.5 kernel or resolving `dkms.conf` issues to allow the 6.8 kernel to install while retaining older driver functionality. This highlights that careful kernel management is critical for consistent 10Gbps connectivity, especially when using passive DACs with specific transceiver types like Intel's FTLX8571D3BCV-IT, where driver compatibility is paramount.
r/homelab
When connecting switches like a Ruckus ICX 7150 (potentially limited to 1Gbps on SFP) to a Cisco SG300, a lack of link lights and connectivity can occur. While SFP+ DACs generally support 1Gbps, the interface speed must be explicitly configured on both ends. A common pitfall is expecting auto-negotiation to bridge dissimilar port capabilities or interface settings (e.g., '1000m' vs '1G'). Verifying port speed settings on both network devices is crucial for successful 10Gbps or 1Gbps link establishment.
r/Cisco
For users building high-performance NAS systems like the Aoostar WTR MAX, the 10Gtek SFP+ DAC cable is a chosen component. While activating the 10Gbps port sometimes requires command-line intervention due to unfamiliarity with SFP+ configurations, users report high satisfaction. Once established, the cable supports systems that maintain cool operation and near-inaudible fan noise from 3 feet (approx. 1 meter) away, indicating efficient data transfer without excessive heat generation.
r/homelab
The 10Gtek SFP+ DAC Twinax Cable employs automated manufacturing processes, including laser cutting and ultraviolet curing, designed to ensure consistent quality and signal integrity. Each cable undergoes TDR (Time-Domain Reflectometry) and VNA (Vector Network Analyzer) measurements to verify performance up to 10Gbps. While specific long-term MTBF (Mean Time Between Failures) data isn't published, the passive twinax design with shielded construction typically offers solid performance for typical data center or home lab environments, resisting minor temperature shifts common in rack-mounted equipment.
Product Specifications & Manufacturing Process
This 10Gtek cable is a passive DAC, meaning it requires no external power and relies on the host equipment's SFP+ ports to provide signaling power. Passive DACs generally consume less power than active ones, typically under 0.1W per end. For a 1-meter length, signal attenuation is minimal, usually well within the 10Gbps Ethernet standard's requirements. Active DACs incorporate signal conditioning electronics, consuming more power but potentially offering better signal integrity over longer distances or in noisier environments.
Technical Specifications
