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QSFP-100G-LR4-S: Cisco 100GBASE-LR4 QSFP28 Optical Transceiver

Cisco QSFP-100G-LR4-S Transceiver100GbEQSFP28
CiscoTransceivers

Also listed as: 10-3023-01, QSFP-100G-LR4-S=

The Cisco QSFP-100G-LR4-S is an enterprise 100GBASE-LR4 QSFP28 optical transceiver delivering 100 Gigabit Ethernet over single mode fibre up to 10 kilometers.

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Specifications

Part numberQSFP-100G-LR4-S
BrandCisco
TypeTransceivers
Other numbers10-3023-01, QSFP-100G-LR4-S=
Statuscurrent
Form factorQSFP28
Speed100GbE
Wavelength nm1,310
ConnectorLC duplex
Cable typeSingle Mode Fibre
Max distance m10,000

About the QSFP-100G-LR4-S

The Cisco QSFP-100G-LR4-S optical module provides 100 Gigabit Ethernet connectivity for enterprise core switching, aggregation layers, and campus data center backbones. It multiplexes four LAN-WDM lanes around 1310 nanometers, each operating at 25 Gigabits per second, over standard duplex single mode fibre. It provides reliable link margins across outdoor plant and intra-campus distribution paths up to 10 kilometers.

Compatibility

Compatible with Cisco Nexus 9300, 9500, 3200 Series data center switches and Cisco Catalyst 9500, 9600 Series campus core platforms. It plugs directly into standard QSFP28 ports without requiring external gearbox hardware, delivering direct 100Gbps line rate performance under NX-OS and IOS-XE.

How to identify a genuine unit

Constructed in an industry standard QSFP28 metal enclosure with a blue pull tab indicating longwave single mode optical operation. The top printed label contains the Cisco logo, part number QSFP-100G-LR4-S, manufacturing assembly reference 10-3023-01, and individual serial barcode tracking.

Buying used

Inspect optical transceiver ferrule surfaces and confirm with diagnostic software that all four optical receiver channels operate with balanced power levels. Verify that the module is correctly recognized as genuine Cisco equipment in the system inventory output without invoking warning messages.

Fits these models

Works together

How the Cisco QSFP-100G-LR4-S 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 Cisco

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Cisco has tested with the Cisco QSFP-100G-LR4-S.

FAQ

What is the transmission reach of QSFP-100G-LR4-S?

It supports transmission distances up to 10 kilometers over standard duplex single mode fibre.

Does this transceiver use LAN-WDM technology?

Yes, it uses four optical LAN-WDM wavelengths multiplexed onto a standard single mode fibre pair.

Buying or selling QSFP-100G-LR4-S?

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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