QSFP-100G-ERL4 Arista Compatible 100G QSFP28 40KM Transceiver
Arista compatible QSFP-100G-ERL4 - Key Features
- Compatibility: Arista
- Media Type: Single-Mode Fiber (SMF)
- Connector: Double LC/UPC
- Fiber Count: Duplex
- Maximum Distance: 40 km
- Guaranteed Link Budget: 22 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-ERL4 Price
SKU:100G-QSFP28-40-AR
In Stock - Ships Next Business DayArista compatible QSFP-100G-ERL4 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 | 40 km |
Guaranteed Link Budget | 22 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) |
Supported Fiber Channel Applications | 4x 32G Fiber Channel (112.2Gbps) |
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 | -2 dBm |
Average Launch Power (Max) Each Lane | 4 dBm |
Extinction Ratio (Min) | 4 dB |
Receiver Type | APD 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 | -21 dBm |
Average Receiver Sensitivity (Max) Each Lane | -18 dBm |
Receiver Overload | -1 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 4.5 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-ER4 Lite, 128GFC Gen 6, OTN OTU4, QSFP28 MSA, SFF-8636 (Management Interface for 4-lane modules), SFF-8665 |
Arista compatible QSFP-100G-ERL4 Datasheet
v2Complete technical specifications and product details
Arista compatible QSFP-100G-ERL4 Description
QSFP-100G-ERL4 is Arista's part number for a 100GBASE-ER4 Lite QSFP28 transceiver. Note the Arista naming convention: “ERL4” rather than “ER4L” as used by Juniper and Cisco. The letter order differs but the optical specification is identical across vendors. EdgeOptic's compatible replacement is built on our 100G-QSFP28-40 platform, matching the original optical and electrical parameters.
Arista qualifies the QSFP-100G-ERL4 for 7280R3 (7280R3-48YC6, 7280R3-96S), 7500R3 (7504R3, 7508R3), 7060X4 (7060X4-32), 7060X5 (7060X5-64), and 7260CX3 (7260CX3-64) platforms. These switches serve data center spine/leaf fabrics, DCI (data center interconnect), and peering applications where 40 km reach is needed between sites. The 7280R3 and 7500R3 in particular are deployed in service provider and large enterprise networks that require metro-distance 100G for inter-site connectivity.
Four EML transmitters generate 25G NRZ signals on LAN WDM wavelengths: 1295.56, 1300.05, 1304.58, and 1309.14 nm. The signals are multiplexed and transmitted through duplex LC/UPC connectors over standard G.652 single-mode fiber. On the receive side, four PIN photodiodes with TIA stages demultiplex and recover the four lanes. Per-lane launch power is approximately -2.9 dBm minimum, and receiver sensitivity reaches around -20.9 dBm with host-side FEC. The ER4 Lite specification relies on this FEC assistance to achieve the full 40 km reach, unlike the full 100GBASE-ER4 standard that specifies 40 km without error correction.
Arista's EOS validates transceiver vendor codes at module insertion. EdgeOptic's compatible is programmed with Arista-recognized EEPROM identifiers, so EOS reports it as a qualified optic in 'show interfaces transceiver' and 'show inventory' output. DDM telemetry (Tx/Rx optical power per lane, module temperature, laser bias current, and supply voltage) is accessible through EOS CLI, eAPI (JSON-RPC), and streaming telemetry via gNMI with OpenConfig models. This makes the module compatible with automated monitoring through tools like Prometheus, Grafana, or CVP (CloudVision Portal).
For DCI or metro backbone links between Arista switches, the QSFP-100G-ERL4 provides 40 km reach without external amplification or dispersion compensation. Both ends of a link must run ER4 Lite (or full ER4) optics; pairing with a 10 km LR4 module on the far end exceeds the LR4 receiver's link budget beyond 10 km. For volume pricing or 7280R3/7500R3 deployment planning, contact our sales team
Frequently Asked Questions
Is QSFP-100G-ERL4 the same as QSFP-100G-ER4L?
Yes. Arista uses the naming "ERL4" while Cisco (ER4L-S), Juniper (ER4L), and other vendors write "ER4L." All refer to the same 100GBASE-ER4 Lite specification: QSFP28 form factor, LAN-WDM wavelengths, 40 km reach with FEC. The naming difference is vendor convention only.
Which Arista switches support the QSFP-100G-ERL4?
The QSFP-100G-ERL4 is supported on Arista 7280R3, 7500R3, and 7800R3 series platforms with QSFP28 ports. On the 7280R3, some port positions have thermal restrictions for ER4 Lite modules. Check the Arista Transceiver Compatibility Guide for your specific model and port mapping.
Can I use the Arista QSFP-100G-ERL4 with a Cisco ER4L-S on the other end?
Yes. Both modules use the same LAN-WDM wavelengths (1295-1309 nm) and are fully interoperable on the same single-mode fiber link. Ensure FEC settings match on both ends. If one side has FEC enabled and the other does not, the link will not establish.
Does the QSFP-100G-ERL4 require FEC for 40 km reach?
Yes. Without host RS-FEC, the module reaches approximately 30 km. With RS-FEC enabled on the Arista switch, reach extends to 40 km. Configure FEC in Arista EOS at the interface level and ensure the remote end matches.