Arista QSFP-100G-LR4 Compatible 100GBASE-LR4 QSFP28 Module, 10km SMF
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
- Average Link Budget: 6.3 dB
- Tx Wavelength: 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
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 |
Average Link Budget | 6.3 dB |
TX Wavelength | 4-channel LAN WDM (1295.56/1300.05/1304.58/1309.14 nm) |
RX Wavelength | 4-channel LAN WDM (1295.56/1300.05/1304.58/1309.14 nm) |
Supported Data Rate | 112 Gbps |
Supported Ethernet Applications | 100G Ethernet (103.125 Gbps) |
Optical Transport Network (OTN) Applications | OTU4 (112 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
v3Complete technical specifications and product details
Arista compatible QSFP-100G-LR4 Description
EdgeOptic's QSFP-100G-LR4 compatible is an Arista-coded 100GBASE-LR4 QSFP28 transceiver, built on our 100G-QSFP28-10 hardware platform. QSFP-100G-LR4 is the Arista part number for the IEEE 802.3ba Clause 88 100GBASE-LR4 standard optic specified for 10 km on single-mode fiber. Each unit ships with Arista-recognised EEPROM values pre-programmed, so the module identifies on Arista EOS through the standard transceiver detection path without requiring the service unsupported-transceiver override on the platforms QSFP-100G-LR4 is qualified for. The QSFP-100G-LR4 reference is the standard 10 km LR4 form; the QSFP-100G-LRL4 ordering code is a separate Arista reduced-power-budget LR4 Lite variant for 2 km runs and is covered by a different EdgeOptic SKU.
Optically the module conforms to IEEE 802.3ba Clause 88. Four LAN-WDM channels at 1295.56, 1300.05, 1304.58 and 1309.14 nm each carry 25.78125 Gbps NRZ on a single duplex LC SMF pair for an aggregate 103.125 Gbps line rate. The transmitter uses an EML laser per lane. TX power, RX sensitivity and laser bias are exposed via SFF-8636 DDM telemetry through the standard QSFP28 management interface. The optical path loss budget is 6.3 dB on G.652 single-mode fiber, supporting 10 km on typical metro and campus plant. The QSFP28 form factor follows MSA SFF-8665, with hot-plug operation on a live Arista chassis and DDM/DOM telemetry through SFF-8636 exposing per-lane TX and RX optical power, module temperature, supply voltage and laser bias current. Module power draw is up to 4.5 W.
Arista lists QSFP-100G-LR4 against 100G QSFP28 ports across the 7050, 7060, 7250, 7280, 7300, 7500 and 7800 series switching platforms. The exact set of qualified line cards and EOS releases for each chassis varies by software train and line-card revision. Verify the QSFP-100G-LR4 reference against the Arista transceiver compatibility guide for the specific platform, line card and EOS release before deployment. The Arista-coded EEPROM identification means the standard transceiver detection path on Arista EOS recognises the module on the qualified hosts without an unsupported-transceiver override; engineers running custom EOS optics policies should verify the policy state before installation.
QSFP-100G-LR4 and QSFP-100G-CWDM4 are both 100G QSFP28 client optics on the Arista catalogue but use different wavelength plans and are not interchangeable. QSFP-100G-LR4 uses LAN-WDM (1295 to 1309 nm window) and is specified for 10 km on SMF under IEEE 802.3ba. QSFP-100G-CWDM4 uses CWDM (1271, 1291, 1311, 1331 nm) and is specified for 2 km on SMF under the CWDM4 MSA. The LR4 envelope and CWDM4 envelope cannot terminate against each other on the same fiber pair. The duplex LC connector accepts standard SMF patch cords, and the commercial 0 to 70 °C operating temperature range covers typical campus, metro and POP environments.
Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For BOM verification or volume pricing, contact our sales team.
Frequently Asked Questions
Which Arista switches support the QSFP-100G-LR4?
Arista lists QSFP-100G-LR4 against 100G QSFP28 ports across the 7050, 7060, 7250, 7280, 7300, 7500 and 7800 series switching platforms. The exact set of qualified line cards and EOS releases for each chassis varies by software train and line-card revision. Verify the QSFP-100G-LR4 reference against the Arista transceiver compatibility guide for the specific platform, line card and EOS release before deployment.
How does the compatible QSFP-100G-LR4 identify on Arista EOS?
EdgeOptic codes each QSFP-100G-LR4 unit with Arista-recognised EEPROM values for the platforms Arista qualifies for this ordering code. On the qualified hosts the module identifies through the standard transceiver detection path under EOS, and the show interfaces transceiver commands return the expected vendor identity, part number and DDM telemetry. The service unsupported-transceiver override is the EOS mechanism for non-Arista-coded third-party optics; an Arista-coded compatible like this one does not require that override on the qualified platforms. For deployments using a custom EOS optics policy, verify the policy state for that platform and software release before installation.
Does DDM/DOM telemetry work with the compatible QSFP-100G-LR4 on Arista?
Yes. The QSFP28 form factor implements the SFF-8636 management interface, which exposes per-lane TX and RX optical power, module temperature, supply voltage and laser bias current via the I2C control path. Arista EOS reads the SFF-8636 fields through the standard transceiver detection path and returns the values under the show interfaces transceiver commands. The Arista-coded EEPROM on the EdgeOptic compatible carries the same SFF-8636 management interface as the OEM module, so the EOS DDM telemetry chain works without modification.
What is the difference between QSFP-100G-LR4 and QSFP-100G-CWDM4 on Arista?
QSFP-100G-LR4 uses the 4-channel LAN-WDM grid (1295.56, 1300.05, 1304.58 and 1309.14 nm) and is specified for 10 km on single-mode fiber under IEEE 802.3ba. QSFP-100G-CWDM4 uses the 4-channel CWDM grid (1271, 1291, 1311 and 1331 nm) and is specified for 2 km on single-mode fiber under the CWDM4 MSA. Both are 100G QSFP28 client optics, but the wavelength plans, optical envelopes and target reach differ, and the modules cannot terminate against each other on the same fiber pair. Arista publishes both as separate ordering codes; EdgeOptic indexes each as a separate SKU.
Does the QSFP-100G-LR4 use FEC, and can FEC extend its reach beyond 10km on Arista?
100GBASE-LR4 under IEEE 802.3ba Clause 88 does not specify a mandatory line-side FEC; the module is transparent to host-side FEC. Arista EOS may negotiate BASE-R FEC or RS-FEC on the host MAC depending on the platform and configuration, but FEC selection happens at the host MAC, not in the optic. FEC reduces the link bit error ratio but does not change the optical TX power or RX sensitivity envelope of the LR4 specification, so the practical reach remains anchored to the 6.3 dB optical path loss budget at 10 km on G.652 single-mode fiber. Engineering a link beyond the LR4 reach budget calls for a different optical specification (for example, the ER4 or extended-reach ER4 Lite ordering codes) rather than relying on FEC to bridge the additional path loss.