Juniper QFX-QSFP-40G-ESR4 QSFP+ 40GBase-eSR4 | QSFP+ Module, Enterprise

Maintain high-speed connectivity between switches, servers, and aggregation layers with the Juniper QFX-QSFP-40G-ESR4 transceiver. This QSFP+ module is designed for 40GBase-eSR4 links over multimode fiber, using an MPO connector to support short-reach optical deployments in dense network environments. For infrastructure teams, the value is in consistency. Short-reach optics reduce complexity in rack-to-rack and row-to-row connections while preserving the throughput required for storage traffic, virtualization, and east-west data movement. The QSFP+ form factor keeps port density high, which matters when every rack unit and every switch port is already allocated. Choose this module when you need a Juniper-qualified transceiver for 40 GbE optical links and want to avoid the uncertainty of generic optics in production networks. It is a practical fit for environments that depend on repeatable interoperability, clean cable management, and stable performance across multimode fiber infrastructure.