The Arista QSFP-100G-ERL4 is a QSFP28 100GBASE-ERL4 module from Arista Networks for 100 Gbps links. It plugs into a 100G QSFP port on an Arista switch and is used for 100G leaf-spine fabrics, DC interconnect, 4 × 25G breakout and service-provider aggregation.

Arista specifies the QSFP-100G-ERL4 for 30 km without FEC and 40 km with FEC on duplex single-mode fiber (interoperates with IEEE 100GBASE-ER4 up to 30 km). Arista notes that proper optical attenuation is required on shorter links to protect the receiver from damage.

Per Arista's published optics data sheet, the QSFP-100G-ERL4 transmits −2.9 to +4.5 dBm/lane and receives −20.9 to −4.9 dBm/lane (40 km).

The QSFP-100G-ERL4 uses a Duplex LC connector on duplex single-mode (G.652), at 4 lambda LAN-WDM, 1310 nm band. Both ends of the link must use the same optical standard.

It works in Arista switches with 100G QSFP ports that support this optic. Send us your switch model and EOS version and we will check it against Arista's Transceiver and Cable Guide before dispatch, so you only receive a module that works in your port.

QSFP-100G-ERL4 is a 4-wavelength LAN-WDM optic (40 km with FEC). QSFP-100G-ER is a single-lambda optic for 40 km. Both need attenuation on short links; use the same type at both ends.

Yes. Next Gen Networks supplies original Arista Networks optics, not third-party lookalikes or grey-market stock. Every unit is checked before dispatch, and we share the serial numbers on request so you can verify them in EOS ('show inventory').

The Arista QSFP-100G-ERL4 price in India depends on quantity, delivery city and current stock. Next Gen Networks supplies it with a GST invoice (input tax credit ready) and pan-India dispatch from New Delhi. Send the part number, quantity and delivery city on WhatsApp +91-7827955775 or email Sales@nextgennetworks.in and we reply with a GST quote.

Arista lists maximum power of 4.5 W for the QSFP-100G-ERL4. Check your switch's per-port power budget for dense deployments.