Sourced for enterprise IT teams, the Juniper QFX-QSFP-40G-LRM4 (QFX-QSFP-40G-LRM4 - Juniper 40Gbps 40GBase-LR4 Single-mode Fiber 10km 1330nm MPO Connector QSFP+ Transceiver Module) is a Transceiver component appropriate for new-build, expansion, or warranty-replacement procurement. Technical specifications include network speed of 40 GbE, wavelength of 1330 nm, range of 10 km, features of QSFP. Appropriate for enterprise core-aggregation tier, hyperscale leaf-spine fabric expansion, EVE-NG / GNS3 lab environments at scale, and matched-pair high-availability switching deployments. Pro Disk Network maintains the QFX-QSFP-40G-LRM4 in our enterprise inventory and verifies each unit against manufacturer datasheet specifications prior to listing. New stock ships factory-sealed where available; refurbished units are tested under load before dispatch and ship with a 90-day Pro Disk Network functional warranty. Same-day dispatch on in-stock orders placed before 3pm ET; free standard ground shipping on US orders over $150.
The QFX-QSFP-40G-LRM4 is a Juniper transceiver component with network speed 40 GbE, wavelength 1330 nm, range 10 km. Pro Disk Network sells the QFX-QSFP-40G-LRM4 for $3,932.28 with same-day US shipping and a 30-day return guarantee.
Reviewed By
Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the QFX-QSFP-40G-LRM4 are shown on this page.
Trust Signals
US-based LLC — 7345 W Sand Lake Rd, STE 210, Office 3208, Orlando, FL 32819
Same-Day US Shipping — orders before 3pm ET ship today via UPS
30-Day Returns — pre-paid label on DOA and defective items
Quick Answer: Is the QFX-QSFP-40G-LRM4 compatible with my switch?
Pro Disk Network validates every QFX-QSFP-40G-LRM4 against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the QFX-QSFP-40G-LRM4 ship?
If in stock, the QFX-QSFP-40G-LRM4 ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
The QFX-QSFP-40G-LRM4 is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
Spine-Leaf Fabric — Top-of-rack 25G/100G aggregation between leaf and spine switches. Match speed and form factor across both endpoints.
Server Uplink — 10G/25G server-to-leaf uplink — pair with matching DAC or AOC at the host NIC to avoid optic mismatch.
DCI (Data Center Interconnect) — Inter-DC routing or aggregation. LR4/LR8 transceivers for 10–80 km, ER4 for 40 km, ZR4 for coherent long-haul.
Campus Distribution — Catalyst-class campus distribution between IDF and MDF closets. PoE+ where wireless APs and IP phones share infrastructure.
What is the QFX-QSFP-40G-LRM4?
The QFX-QSFP-40G-LRM4 is a Juniper network interface module with network speed 40 GbE and wavelength 1330 nm, manufactured by Juniper. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.
Pros & Cons of QFX-QSFP-40G-LRM4
Pros
Same-day US shipping cuts deployment downtime
Cons
Not for hyperscale ZR coherent — different SKU family
Some vendors deprecate firmware on EOL part numbers
Mismatched optic+switch firmware can require manual override
Frequently Asked Questions about QFX-QSFP-40G-LRM4
Is the QFX-QSFP-40G-LRM4 a genuine Juniper part?
Yes. Pro Disk Network sources every QFX-QSFP-40G-LRM4 as factory-original Juniper inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Juniper servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Is the QFX-QSFP-40G-LRM4 compatible with my switch?
Pro Disk Network validates every QFX-QSFP-40G-LRM4 against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the QFX-QSFP-40G-LRM4 ship?
If in stock, the QFX-QSFP-40G-LRM4 ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
What is the warranty on the QFX-QSFP-40G-LRM4?
New QFX-QSFP-40G-LRM4 units carry the full Juniper manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the QFX-QSFP-40G-LRM4?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
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Pro Disk Network Buyer’s Guide: Transceiver
Optic Coding, Vendor Lock-In, and Multi-Vendor Compatibility
Networking optics — SFP, SFP+, QSFP+, QSFP28 — are physically interoperable across vendors but logically restricted by firmware coding. The QFX-QSFP-40G-LRM4 is coded for a specific vendor family at our factory step before shipping, which preserves the OEM warranty workflow and allows the optic to be recognised without ‘service unsupported-transceiver’ CLI overrides. Mixing third-party optics with same-vendor optics in the same chassis is safe; mixing across vendor codings sometimes triggers warnings in the switch log.
Bandwidth Sizing for Spine-Leaf, EVPN-VXLAN, and Hyperconverged Storage
For EVPN-VXLAN overlays, the QFX-QSFP-40G-LRM4 carries the underlay tunnels in addition to the workload traffic. Plan for VXLAN encapsulation overhead (50 bytes) plus MTU headroom; set the underlay MTU to 9216 (jumbo frames) and the overlay MTU to 9000. Make sure both the QFX-QSFP-40G-LRM4 and the connected NICs support jumbo frames — some older NICs cap at 9000-byte payloads even when jumbo-enabled.