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QFX-QSFP-40G-SR4: Juniper QFX 40GBASE-SR4 QSFP+ Optical Transceiver Module

Juniper QFX-QSFP-40G-SR4 Transceiver40GbEQSFP+
JuniperTransceivers

Also listed as: 740-032986, FTL410QE2C-J1, AFBR-79EEPZ-JU1

The Juniper QFX-QSFP-40G-SR4 is a 40GBASE-SR4 QSFP+ optical transceiver providing 40 Gigabit Ethernet connectivity up to 150 meters over OM4 multimode fibre for QFX switches.

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Specifications

Part numberQFX-QSFP-40G-SR4
BrandJuniper
TypeTransceivers
Other numbers740-032986, FTL410QE2C-J1, AFBR-79EEPZ-JU1
Statuscurrent
Form factorQSFP+
Speed40GbE
Wavelength nm850
ConnectorMPO-12
Cable typeMultimode Fibre
Max distance m150

About the QFX-QSFP-40G-SR4

The Juniper QFX-QSFP-40G-SR4 optical transceiver provides high density 40 Gigabit Ethernet connectivity for data center aggregation layers and core spine switches. Operating over four parallel optical lanes at 850 nanometers on multimode fibre, it supports link lengths up to 100 meters on OM3 and 150 meters on OM4 optical cabling.

Compatibility

Compatible with Juniper QFX5100, QFX5110, QFX5200, EX4600, EX4650, and MX Series modular router line cards. It supports native 40GbE fabric links as well as channelized 4x10GbE breakout mode configured via standard Junos OS command line interface options.

How to identify a genuine unit

Constructed in a QSFP+ metallic casing with a beige or black pull tab release mechanism. The manufacturing label displays Juniper Networks branding, part number QFX-QSFP-40G-SR4, assembly code 740-032986, serial number, and optical laser safety warnings.

Buying used

Inspect the MPO internal optical guide pins and ferrule face with an MPO fiber scope to ensure no dust or scratches exist on any of the optical fiber lanes. Test on a QSFP+ switch port to ensure all four optical lanes synchronize and report balanced optical power levels.

Fits these models

Works together

How the Juniper QFX-QSFP-40G-SR4 connects to servers, storage and the network: 3 ways, with the hardware on each path.

iSCSI and NVMe/TCP over EthernetFile storage (NFS and SMB)Hyperconverged cluster

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Adapters for the server

Switches

Storage

iSCSI and NVMe/TCP over Ethernet: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Adapters for the server

Switches

Storage

File storage (NFS and SMB): how it fits together

Hyperconverged cluster

Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.

HCI nodes

Adapters for the server

Switches

Hyperconverged cluster: how it fits together

Plan and size it

Check compatibility with Juniper

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Juniper has tested with the Juniper QFX-QSFP-40G-SR4.

FAQ

What optical connector is used on the QFX-QSFP-40G-SR4?

It uses a 12-fiber female MPO/MTP optical connector interface.

Can this transceiver break out into four 10GbE links?

Yes, using an MPO to four duplex LC breakout cable, it supports four independent 10GBASE-SR connections.

Buying or selling QFX-QSFP-40G-SR4?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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Sources