Arista QSFP-100G-ERL4-Arista | 100G Transceiver, Single-Mode, 1310nm, 40km, LC

Q: What is the maximum reach of the QSFP-100G-ERL4?
A: The transceiver supports up to 40 km over single-mode fiber when forward error correction (FEC) is enabled on the host switch. Without FEC, it reaches up to 30 km.

Q: Is this transceiver compatible with other vendor ER4L modules?
A: Yes. The QSFP-100G-ERL4 follows the 100GBASE-ER4 Lite standard and is interoperable with Cisco (ER4L-S), Juniper (ER4L), and other vendor-compatible modules, provided FEC settings match on both ends.

Q: Which Arista platforms support the QSFP-100G-ERL4?
A: The transceiver is supported on Arista 7280R3, 7500R3, and 7800R3 series switches with QSFP28 ports. Some platforms may have thermal restrictions on certain port positions, so consult the Arista Transceiver Compatibility Guide for your specific model.

Q: Does the QSFP-100G-ERL4 require special optical attenuation?
A: Yes, a minimum of approximately 10 dB attenuation is required for shorter distances to protect the APD receiver from damage. This is critical for links shorter than the rated minimum distance.

Q: What type of fiber and connector does this module use?
A: The transceiver uses duplex single-mode fiber (SMF) with a standard duplex LC connector. It operates on four LAN-WDM wavelengths multiplexed over a single fiber pair.