SFP-100M-FX-BCC | Arista Compatible 100MB Multi-Mode - 2km (100BASE-FX)

Q: Will this work in place of the Arista SFP-100M-FX?
A: Yes. This transceiver is engineered to the same IEEE 802.3 100BASE-FX standard with matching form factor, data rate (100 Mbps), wavelength (1310nm), and reach (2km over MMF). It is plug-and-play compatible and will initialize identically in Arista platforms supporting the original SKU.

Q: Which Arista platforms support this 100BASE-FX transceiver?
A: This module is compatible with Arista switches and routers featuring MSA-compliant SFP ports that support 100 Mbps Fast Ethernet operation. Consult the Arista Transceiver and Cable Guide for your specific platform model to confirm SFP-100M-FX support, as not all SFP ports support sub-gigabit speeds.

Q: What fibre type is required and can this work with single-mode fibre?
A: This transceiver is designed for multi-mode fibre (MMF) with LC duplex connectors and operates at 1310nm. While 1310nm is commonly associated with single-mode applications, this specific 100BASE-FX variant is optimized for MMF and may not meet link budget or modal bandwidth requirements over single-mode fibre. Use 100BASE-LX modules for single-mode deployments.

Q: What DOM parameters are accessible and how are they accessed?
A: The module reports transmit power, receive power, laser bias current, supply voltage, and temperature via the SFF-8472 DOM interface. These parameters are accessible through the host switch CLI or SNMP-based network management systems that poll the module's I2C interface, enabling real-time link budget analysis and fault isolation.

Q: Can this transceiver operate in SFP+ or SFP28 ports configured for lower speeds?
A: Compatibility depends on the specific host platform and whether the port supports speed negotiation down to 100 Mbps. Many SFP+ and SFP28 ports are designed for gigabit and higher speeds only and may not recognize or link with 100BASE-FX modules. Verify platform documentation or consult Arista compatibility matrices before deploying in ports designed for higher speed standards.