FS QSFP28 LR4 - The Optimal Choice for 100G Applications

Updated on Dec 22, 2021

The most straightforward way to connect 100G traffic is by using standard transceivers and one of the most popular modules is QSFP28. Among the different types of 100G QSFP28 optical transceiver modules, QSFP28 LR4 is often chosen for its long-distance transmission and low power consumption in 100G Ethernet. This article will introduce the basic information about QSFP28 LR4 and provide compatible switch solutions for the module.


Brief Introduction of FS QSFP28 LR4 Module

FS 100G QSFP28 LR4 is a hot-pluggable, four-channel, and full-duplex optical transceiver module, providing superior performance for 100G applications up to 10km over SMF with a working bandwidth of 1295nm to 1310nm. It provides an ideal solution for super-large-scale data centers, high-performance computing networks, enterprise core and distribution layers, campus networks etc. For more detailed information, please visit here: Overview of QSFP28 LR4 Optical Transceiver.


FS QSFP28 LR4 Transceiver: Specifications

Form Factor QSFP28
Max Data Rate 103.125Gbps (4x 25.78Gbps)
Max Cable Distance 10km
Connector LC Duplex
Media SMF
Powerbudget 6.3dB
Power Consumption ≤4W
DDM/DOM Supported
Commercial Temperature Range 0 to 70°C (32 to 158°F)
Protocols IEEE 802.3ba 100GBASE-LR4, IEEE 802.3bm, QSFP28 MSA, SFF-8665, SFF-8636

FS QSFP28 LR4 Application Scenarios

FS QSFP28 LR4 module is usually applied to three scenarios: direct connection for 100GbE switches in data centers, direct connection for telecom and 5G wireless network deployments, and supports telecom service provider long-distance transmission applications (the figure below shows the direct connection in two sites).

Figure: FS 100GBASE LR4 Service Provider Application


FS QSFP28 LR4 Solutions

Here listed the network switches that FS 100G QSFP28 LR4 module can work with (as the table shows below).

Switches Description Switching Capacity Forwarding Rate
Cisco C9500-24Y4C Cisco Catalyst 9500 Series high-performance 24p 1/10/25G SFP28 2.0 Tbps 1 Bpps
Cisco N9K-C93180YC-EX Nexus 9K Fixed with 48p 1/10G/25G SFP and 6p 40G/100G QSFP28 2.16 Tbps 1.6 Bpps
Cisco N9K-C92160YC-X Nexus 9200 with 48p 1/10G/25G SFP+ and 6p 40G QSFP+ or 4p 100G QSFP28 7.2 Tbps 5.35 Bpps
Huawei S6720-30L-HI-24S Huawei S6700 Series 24p 10G SFP+, 4p 40G QSFP+, and 2p 100G/40G QSFP28 2.56 Tbps /
Extreme X690-48x-2q-4c Extreme X690 Series 48p 1G/10G SFP+, 2p 10G/40G QSFP+, and 4p 10G/25G/40G/50G/100G QSFP28 1.76 Tbps 759 Mpps
HP 5950 32Q28 Switch JH321A HPE FlexFabric 5950 Switch Series 2p 1G/10G SFP+ and 32p 100G QSFP28 25.6 Tbps /
Juniper QFX10002-72Q The QFX10002-72Q 40GbE switch offers 72 QSFP+ ports or 24 QSFP28 ports with four redundant 1600 W AC/DC power supplies and three fan trays. 5.76 Tbps 2 Bpps
Dell Z9100-ON The switch can be configured to have either 32p 100G, 64p 50G, 32p 40G, 128p 25G or 128+2p 10G. 6.4 Tbps 4400 Mpps
Arista DCS-7160-48YC6 Arista 7160 Series, High Capacity 48p 25G SFP and 6p 100G QSFP 6.4 Tbps 2.4 Bpps
FS S5850-48S2Q4C 48-Port Ethernet L3 Fully Managed Plus Switch, 48 x 10Gb SFP+ with 2x 40Gb QSFP+ and 4x 100Gb QSFP28 1.92 Tbps 1071.4 Mpps
FS S5860-48SC 48-Port Ethernet L3 Fully Managed Pro Switch, 48x 10Gb SFP+, with 8x 100Gb QSFP28 2.56 Tbps 1904 Mpps
FS N5860-48SC 48-Port L3 Data Center Switch, 48x 10Gb SFP+, with 8 100GbE QSFP28 2.56 Tbps 1.90 Bpps
FS N8560-32C 32-Port Ethernet L3 Data Center Switch, 32x 100Gb QSFP28 6.4 Tbps 4.76 Bpps
FS N8560-48BC 48-Port Ethernet L3 Data Center Switch, 48x 25Gb SFP28, with 8x 100Gb QSFP28 4 Tbps 2.98 Bpps
FS N8560-64C 64-Port Ethernet L3 Data Center Switch, 64x 100Gb QSFP28 12.8 Tbps 9.52 Bpps
FS N8550-32C 32-Port 100Gb QSFP28 L3 Trident 3 Data Center Managed Ethernet Switch 6.4 Tbps 4.7 Bpps
FS N8550-48B8C 48-Port 25Gb SFP28 L3 Trident 3 Data Center Managed Ethernet Switch with 8 100Gb QSFP 4 Tbps 2.9 Bpps
FS NC8200-4TD 4-Slot 2U Ethernet L3 Data Center Chassis Switch Unloaded, Supports 4x 25/40/100Gb Line Cards 6.4 Tbps 4.76 Bpps
FS NC8400-4TH 4-Slot 4U Ethernet L3 Data Center Chassis Switch Unloaded, Supports 4x 32-Port 100Gb QSFP28 Line Card 25.6 Tbps 19.05 Bpps


All FS QSFP 100G LR4 transceivers must run through programming and an extensive series of platform diagnostic tests to ensure its performance and compatibility. Therefore, FS QSFP28 LR4 optical modules with high quality can provide ideal solutions for various FS and non-FS switches applied in long-distance (no more than 10km) 100G direct connection and interconnection.

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