Arista SFP-10G-ERLBD-D-Arista | 10G SFP+ BiDi Transceiver, 30km, Single-Mode, Simplex LC

Q: What is the difference between SFP-10G-ERLBD-D and SFP-10G-ERLBD-U?
A: The SFP-10G-ERLBD-D is the downlink variant that transmits at 1330nm and receives at 1270nm. The SFP-10G-ERLBD-U is the uplink variant with reversed wavelengths (Tx 1270nm / Rx 1330nm). They are complementary BiDi modules that must be deployed as a matched pair at opposite ends of a single-fiber link.

Q: Can this transceiver be used on links shorter than 30km?
A: Yes, but proper optical attenuation must be used on shorter spans to bring the received power within the specified range and prevent receiver saturation or damage. The high optical budget means that very short links may require inline attenuators.

Q: Which Arista platforms support this transceiver?
A: The SFP-10G-ERLBD-D is supported on Arista switches and routers with SFP+ ports running EOS version 4.21.3 or later. Consult the Arista Transceiver Compatibility Guide for platform-specific confirmation.

Q: Does this module support Digital Diagnostic Monitoring?
A: Yes. The SFP-10G-ERLBD-D supports DDM/DOM, enabling real-time monitoring of transmit power, receive power, temperature, voltage, and laser bias current through the Arista EOS management interface for proactive fault detection.

Q: What fiber type and connector does this transceiver require?
A: This transceiver requires single-mode fiber (SMF) compliant with ITU-T G.652 standards and uses an LC simplex connector. It operates over a single fiber strand, reducing fiber infrastructure requirements by 50% compared to traditional duplex transceivers.