Arista QSFP-100G-LR4 Arista Compatible 100G QSFP28 10KM Transceiver
Arista compatible QSFP-100G-LR4 - Key Features
- Compatibility: Arista
- Media Type: Single-Mode Fiber (SMF)
- Connector: Double LC/UPC
- Fiber Count: Duplex
- Maximum Distance: 10 km
- Guaranteed Link Budget: 6.3 dB
- Tx Wavelenght: 1310 nm
- Supported Data Rate: 112 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Host FEC Supported
- Temperature Range: Standard 0°-70°C
Arista QSFP-100G-LR4 Price
SKU:100G-QSFP28-10-AR
In Stock - Ships Next Business DayArista compatible QSFP-100G-LR4 Specifications
Form Factor | QSFP28 |
Modulation | NRZ (Non-Return to Zero) |
Media Type | Single-Mode Fiber (SMF) |
Connector | Double LC/UPC |
Fiber Count | Duplex |
Maximum Distance | 10 km |
Guaranteed Link Budget | 6.3 dB |
TX Wavelenght | 4-channel LAN WDM (1295.56/1300.05/1304.58/1309.14 nm) |
RX Wavelenght | 4-channel LAN WDM (1295.56/1300.05/1304.58/1309.14 nm) |
Supported Data Rate | 112 Gbps |
Supportet Ethernet Applications | 100G Ethernet (103.125 Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Host FEC Supported |
Transmitter Type | EML Laser |
Tx Wave Bandwidth | 4 LAN WDM Seperated 1310 nm Lanes (15.66 nm 1294.53 – 1310.19nm) (L0 Tx center 1295.56nm, L1 Tx center 1300.05nm, L2 Tx center 1304.58nm, L3 Tx center 1309.14nm) |
Average Launch Power (Min) Each Lane | -4.3 dBm |
Average Launch Power (Max) Each Lane | 4.5 dBm |
Extinction Ratio (Min) | 4 dB |
Receiver Type | PIN photodiode |
RX Wave Bandwidth | 4 LAN WDM Seperated 1310 nm Lanes (15.66 nm 1294.53 – 1310.19nm) (L0 Tx center 1295.56nm, L1 Tx center 1300.05nm, L2 Tx center 1304.58nm, L3 Tx center 1309.14nm) |
Average Receiver Sensitivity (Min) Each Lane | -10.6 dBm |
Average Receiver Sensitivity (Max) Each Lane | -8.6 dBm |
Receiver Overload | 5.5 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 3.5 W |
Power | +3.3V single power supply |
Compliance | CE, RoHS, Class 1 FDA and IEC60825-1 Laser Safety Compliant, IEEE 802.3ba, IEEE 802.3bm, 100GBASE-LR4, QSFP28 MSA, SFF-8636 (Management Interface for 4-lane modules), SFF-8665 |
Arista compatible QSFP-100G-LR4 Datasheet
v2Complete technical specifications and product details
Arista compatible QSFP-100G-LR4 Description
QSFP-100G-LR4 is the Arista part number for a 100GBASE-LR4 QSFP28 optical transceiver. Our compatible version uses the same base module as our 100G-QSFP28-10 product, built to MSA specifications with Arista-specific EEPROM programming. It is functionally and optically equivalent to the Arista original.
The module transmits 100GbE over single-mode fiber using LAN WDM technology. Four wavelength channels at 1295.56, 1300.05, 1304.58, and 1309.14 nm each carry 25.78125 Gbps with NRZ modulation, for an aggregate line rate of 103.125 Gbps. The transmitter uses an EML (Electro-absorption Modulated Laser) array and the receiver a PIN photodiode array. The four channels are multiplexed within the 1310 nm window and carried over a single duplex LC fiber pair.
The module provides a minimum optical link budget of 6.3 dB per IEEE 802.3ba, which supports distances up to 10 km over OS2 (G.652.D) single-mode fiber. Actual distance depends on your fiber attenuation and connector losses. The dual LC/UPC connector interface works with standard SMF patch cords and structured cabling.
Digital diagnostic monitoring (DDM/DOM) provides real-time readings of transmitted and received optical power, module temperature, laser bias current, and supply voltage through the SFF-8636 management interface. The module has no internal FEC engine, but is fully transparent to host-side RS-FEC (IEEE 802.3bj Clause 91) running in the switch ASIC. Arista EOS platforms use fec auto or fec rs port configuration, and the module works correctly in both modes. The module conforms to the QSFP28 MSA (SFF-8665) and presents a CAUI-4 host electrical interface (4x25G NRZ lanes per IEEE 802.3bj Clause 83). Operating temperature is 0 to 70°C with maximum power consumption of 3.5W.
Our module is programmed with Arista-specific EEPROM data and has been compatibility-tested on EOS-based platforms including the 7050X3, 7280R3, 7500R3, and 7800R3 series. It works in any Arista switch that lists QSFP-100G-LR4 in its supported transceiver table. Use show interfaces transceiver in EOS to verify DDM readings after insertion. We can also supply the module coded for other vendors; contact our sales team if you need alternative platform coding.
The transceiver meets IEEE 802.3ba and IEEE 802.3bm 100GBASE-LR4 requirements and conforms to the QSFP28 MSA (SFF-8665, IEEE 802.3ba 100GBASE-LR4). It is CE/RoHS certified and compliant with Class 1 FDA and IEC 60825-1 laser safety standards. We measure optical parameters and inspect connectors on every unit before shipment. EEPROM data is validated against the Arista platform configuration. If you need technical consultation or a volume price for your project, contact our sales team.
Frequently Asked Questions
What is Arista QSFP-100G-LR4 price?
Our Arista QSFP-100G-LR4 compatible module is priced from €181.44 per unit. Volume discounts are available for project orders. The module ships from stock with typical lead time of 1-3 business days.
Which Arista switches support QSFP-100G-LR4?
QSFP-100G-LR4 is supported on Arista EOS-based switches including the 7050X3, 7280R3, 7500R3, and 7800R3 series. Any Arista platform with QSFP28 ports that lists QSFP-100G-LR4 in its supported transceiver table can use this module. Refer to Arista’s Transceiver Compatibility Guide for the minimum EOS version required for your specific platform.
How do I enable third-party optics on Arista EOS?
Our module is programmed with Arista-specific EEPROM coding, so it is recognized natively on Arista EOS without the service unsupported-transceiver command. Simply insert the module and it will be identified as QSFP-100G-LR4. Use show interfaces transceiver to confirm the module is detected and DDM readings are available.
Will DDM/DOM readings work with a compatible QSFP-100G-LR4 on Arista?
Yes. Our module reports accurate DDM readings for Tx power, Rx power, temperature, bias current, and supply voltage. Use show interfaces transceiver in Arista EOS to view these values. Our EEPROM data conforms to the SFF-8636 register map, including DDM threshold and alarm fields, so you will not see ghost readings or incorrect thresholds.
What is the difference between QSFP-100G-LR4 and QSFP-100G-CWDM4 on Arista?
Both are 100G QSFP28 modules using four wavelengths over duplex single-mode fiber with LC connectors — same cabling infrastructure. QSFP-100G-LR4 uses LAN WDM channels around 1310 nm and reaches 10 km with a 6.3 dB link budget. QSFP-100G-CWDM4 uses CWDM wavelengths with wider channel spacing and reaches about 2 km with approximately 3.5 dB link budget per IEEE 802.3bm. Choose CWDM4 for intra-campus links under 2 km where cost matters; use LR4 for longer metro or DCI distances.
Can FEC extend QSFP-100G-LR4 reach beyond 10km on Arista?
Some operators have achieved links modestly beyond 10 km on fiber with lower-than-specified attenuation, but this is outside the IEEE 802.3ba specification. The 10 km distance is the specified maximum. Enabling RS-FEC on the Arista EOS port adds coding gain at the electrical interface, which can help on marginal links. Contact us if you need extended reach — we can recommend alternatives for longer distances.
Does QSFP-100G-LR4 use FEC on Arista EOS?
The module has no internal FEC engine. Host-side RS-FEC (IEEE 802.3bj Clause 91) runs in the Arista switch ASIC. On EOS, configure FEC per interface with fec auto (default on most 100G ports) or fec rs. The module works correctly in both modes.