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QSFP-100G-CWDM4-S: Cisco 100GBASE-CWDM4 QSFP28 Optical Transceiver

Cisco QSFP-100G-CWDM4-S Transceiver100GbEQSFP28
CiscoTransceivers

Also listed as: 10-3149-01, QSFP-100G-CWDM4-S=

The Cisco QSFP-100G-CWDM4-S is a 100GBASE-CWDM4 QSFP28 optical transceiver supporting 100 Gigabit Ethernet over duplex single mode fibre up to 2 kilometers.

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Specifications

Part numberQSFP-100G-CWDM4-S
BrandCisco
TypeTransceivers
Other numbers10-3149-01, QSFP-100G-CWDM4-S=
Statuscurrent
Form factorQSFP28
Speed100GbE
Wavelength nm1,310
ConnectorLC duplex
Cable typeSingle Mode Fibre
Max distance m2,000

About the QSFP-100G-CWDM4-S

The Cisco QSFP-100G-CWDM4-S transceiver delivers power efficient 100 Gigabit Ethernet connectivity for intermediate reach data center spine leaf architectures. It operates across four CWDM optical wavelengths at 1271, 1291, 1311, and 1331 nanometers over standard duplex single mode fibre. It provides an economical bridge for distances up to 2 kilometers between data center rows and adjacent halls.

Compatibility

Compatible with Cisco Nexus 9000 and Nexus 3000 Series switching hardware. Requires host system forward error correction to guarantee bit error rate thresholds. Plugs natively into QSFP28 switch ports and interfaces seamlessly with enterprise single mode optical distribution frames.

How to identify a genuine unit

Enclosed in a metal QSFP28 housing with a green pull tab designating CWDM4 optical technology. The Cisco manufacturer label states part designation QSFP-100G-CWDM4-S, assembly part number 10-3149-01, authentic serial number, and laser safety class compliance.

Buying used

Inspect the duplex optical port for physical contaminants or scratch marks on internal lens optics. Verify that the switch platform firmware authenticates the module and provides accurate optical diagnostic metrics across all four CWDM receiver wavelength lanes.

Fits these models

Works together

How the Cisco QSFP-100G-CWDM4-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-CWDM4-S.

FAQ

What is the maximum reach of the QSFP-100G-CWDM4-S module?

It supports link distances up to 2 kilometers over standard single mode fibre with FEC.

Does this module require forward error correction (FEC)?

Yes, host ports must enable RS-FEC (528, 514) to achieve the full 2 kilometer transmission specification.

Buying or selling QSFP-100G-CWDM4-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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