Arista 10GBASE-ER SFP+ Transceiver Module, Single-Mode LC

At 40 km, the Arista 10GBASE-ER SFP+ Transceiver Module, part number SFP-10G-ER, handles 10GbE links well beyond campus distances. It uses a duplex LC connector over single-mode fiber in an SFP+ form factor.

Spans of this length connect separate sites in a metro area without transport equipment in between. The rating assumes good fiber, and the real limit comes from the loss on your route: attenuation, splices and connectors all consume the optical budget. Have the path tested before relying on the headline figure.

Extended-reach optics can overload the receiver on short spans. Check the manufacturer's documentation for attenuation guidance if your route is much shorter than the rating.

The far end of the link needs a compatible ER module, and the fiber must be single-mode throughout. Arista maintains a list of supported optics for its switches, and server adapters or third-party devices may behave differently, so confirm each device.

For spans of 10 km or less, an LR module is usually enough and often costs less. Choose ER only when the distance requires it.

The SFP-10G-ER is offered new and refurbished, with a warranty choice of 1 year or 3 years. No used offer is listed. Send your quantity, span and platform with your request.