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FN-TRAN-QSFP28-LR4: Fortinet 100GBASE-LR4 QSFP28 Optical Transceiver Module

Fortinet FN-TRAN-QSFP28-LR4 Transceiver100GbEQSFP28
FortinetTransceivers

Also listed as: SP-FG-100GE-LR, FG-TRAN-QSFP28-LR4

The Fortinet FN-TRAN-QSFP28-LR4 is a 100GBASE-LR4 QSFP28 optical transceiver providing 100 Gigabit Ethernet transmission up to 10 kilometers over duplex single mode fibre.

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Specifications

Part numberFN-TRAN-QSFP28-LR4
BrandFortinet
TypeTransceivers
Other numbersSP-FG-100GE-LR, FG-TRAN-QSFP28-LR4
Statuscurrent
Form factorQSFP28
Speed100GbE
Wavelength nm1,310
ConnectorLC duplex
Cable typeSingle Mode Fibre
Max distance m10,000

About the FN-TRAN-QSFP28-LR4

The Fortinet FN-TRAN-QSFP28-LR4 optical transceiver delivers high performance 100 Gigabit Ethernet connectivity for long-reach data center interconnects and metropolitan core firewall deployments. It multiplexes four LAN-WDM optical wavelengths around 1310 nanometers over duplex single mode fibre up to 10 kilometers without external amplification.

Compatibility

Compatible with Fortinet FortiGate 1800F, 2600F, 3400E, 3600E, 4200F, 4400F, 4800F, and modular chassis firewalls. It integrates natively into QSFP28 firewall ports and provides real-time telemetry diagnostics via FortiOS command line and FortiManager telemetry systems.

How to identify a genuine unit

Enclosed in a precision QSFP28 metal casing with a blue pull tab extraction mechanism indicating longwave single mode optics. The manufacturer label identifies part designation FN-TRAN-QSFP28-LR4, Fortinet branding, serial number, and international safety compliance marks.

Buying used

Inspect the duplex LC optical receptacle with an optical inspection scope to ensure lack of contamination. Mount into a live FortiGate port to confirm that all four internal DFB laser channels lock into frequency and show balanced optical output power.

Fits these models

Works together

How the Fortinet FN-TRAN-QSFP28-LR4 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 Fortinet

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Fortinet has tested with the Fortinet FN-TRAN-QSFP28-LR4.

FAQ

What is the maximum optical transmission distance?

It supports links up to 10 kilometers over standard G.652 single mode optical fibre.

What optical wavelengths does it use?

It multiplexes four LAN-WDM optical wavelengths around 1310 nanometers onto duplex fibre.

Buying or selling FN-TRAN-QSFP28-LR4?

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