Arista SFP-25G-LR-E | 25G SFP28 Transceiver, Single-Mode, 10km, 1310nm, LC

Q: What is the difference between the SFP-25G-LR-E and standard SFP-25G-LR?
A: The SFP-25G-LR-E is a 25GBASE-CLR variant offering flexible reach options. It supports up to 2km without FEC for low-latency applications, or up to 10km with Forward Error Correction enabled. This makes it ideal for scenarios where latency sensitivity is critical but longer reach may occasionally be needed.

Q: Is this transceiver compatible with Arista switches?
A: Yes, the SFP-25G-LR-E is designed for Arista SFP28 (25G) platform ports and is fully compliant with SFP28 MSA standards. It is compatible with Arista switches and routers that support 25G SFP28 interfaces.

Q: Can I use this transceiver with 10G equipment?
A: Arista 25G SFP ports generally support backward compatibility with 10G SFP+ modules; however, when connecting to legacy 10G fixed-rate optics, optical attenuation may be required to ensure input power stays within allowable limits.

Q: What does Digital Optical Monitoring provide?
A: DOM (also known as DDM) allows real-time monitoring of critical parameters including optical transmit and receive power, supply voltage, laser bias current, and module temperature directly from the switch CLI, helping with proactive troubleshooting and link health monitoring.

Q: What fiber cable type is required for this transceiver?
A: This transceiver requires standard single-mode fiber (SMF) OS1 or OS2 with duplex LC connectors. It operates at 1310nm wavelength and supports distances up to 10km with FEC or 2km without FEC for ultra-low latency applications.