Cisco QSFP-100G-LR4-S Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 100GBASE-LR4 QSFP28 LAN WDM Single-Mode Optical Transceiver Module with Digital Diagnostic Monitoring Support
SKU:QSFP-100G-LR4-S
Naming Breakdown
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QSFP28: Quad Small Form-factor Pluggable 28 hot‑swappable transceiver compliant with SFF‑8665 QSFP28 MSA specification
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100G: Aggregate 103.125 Gbps bandwidth (4 × 25.78125 Gbps NRZ electrical lanes for CAUI-4)
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LR4: Long Reach 4-channel LAN WDM optical transmission, IEEE 802.3bm 100GBASE-LR4 standard
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S: Commercial temperature grade variant (0°C ~ +70°C)
Core Architecture: Four independent 25G NRZ EML optical channels using LAN WDM wavelengths (1295.56 nm, 1300.05 nm, 1304.58 nm, 1309.14 nm). All four optical channels are multiplexed and transmitted overone duplex LC single-mode fiber pair.
Critical Limitation:4×25G electrical breakout is NOT supported; only native 100G operation. No integrated onboard FEC.
Core Product Positioning
The Cisco QSFP-100G-LR4-S is a commercial-grade hot‑swappable QSFP28 optical transceiver built for medium-long haul 100 Gigabit Ethernet connectivity over standard single-mode fiber. It serves intra-metro data center interlinks, campus core backbone connections, and enterprise inter-building fiber runs up to 10 km. Integrated DOM/DDM enables continuous real-time monitoring of optical parameters to simplify routine maintenance and fault troubleshooting.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Nexus 3000 / 9000 Series Switches; Catalyst 9500 / 9600 Series Switches; ASR 1000 Series Routers, UCS servers and other hardware equipped with QSFP28 ports supporting 100 Gigabit Ethernet.
Verify Cisco official transceiver compatibility matrix and minimum required firmware release prior to deployment.
Supported Operating Systems
NX-OS, IOS-XE releases supporting QSFP28 MSA and SFF‑8636 digital diagnostic monitoring functions.
Supported Fiber Media
Single‑Mode Fiber (SMF) G.652 (9/125μm) only; incompatible with multi-mode fiber.
Connector Type
Duplex LC UPC optical connector
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable QSFP28, compliant with SFF‑8665 MSA
Optical Interface
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LAN WDM Wavelength Grid: 1295.56 nm, 1300.05 nm, 1304.58 nm, 1309.14 nm
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Electrical Lane Rate: 4 × 25.78125 Gbps NRZ, aggregate 103.125 Gbps
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Operating Mode: Native 100G only; breakout function disabled
Maximum Transmission Distance
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Up to10 kmover standard G.652 single-mode fiber
Optical Power Budget (per individual lane)
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Average Transmit Optical Power: -4.3 dBm ~ +4.5 dBm
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Minimum Receiver Sensitivity (OMA): -8.6 dBm
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Maximum Allowable Received Optical Power: +4.5 dBm
Digital Diagnostics
DOM / DDM (Digital Diagnostic Monitoring) Supported
Monitors internal module temperature, supply voltage, laser bias current, transmit optical power and receive optical power.
Environmental Specifications (Commercial Grade)
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Operating Temperature:0°C ~ +70°C (32°F ~ 158°F)
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Storage Temperature: -40°C ~ +85°C (-40°F ~ 185°F)
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Relative Humidity: 5% – 95%, non‑condensing
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Maximum Operating Altitude: 3,000 meters
Typical Power Consumption
4. Supported Functional Capabilities
Ethernet Transport
Wire-speed full-duplex native 100GBASE-LR4 Ethernet;no breakout capability, no internal FEC
Layer 2 Protocol Support
802.1Q VLAN trunking, IEEE 802.3x pause frame flow control, LACP, STP/RSTP/MSTP, EtherChannel link aggregation
Interface Diagnostics
Link status detection, error statistics, DOM real-time optical telemetry, LOS (Loss of Signal) alarm indication, Tx disable control, local loopback testing
High Availability
Supports hot-plug OIR (Online Insertion and Removal) on compatible platforms; supports link redundancy via port-channels and spanning tree protocols
Operations & Management
NX-OS / IOS-XE command-line interface, SSH, SNMP v2c/v3, Syslog logging
5. Typical Deployment Scenarios
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Point-to-point 100GE interconnections between geographically separated data centers within 10km range
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Metropolitan enterprise inter-building core backbone single-mode fiber links
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Campus-wide long-distance 100G core network deployments over OS2 single-mode fiber
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Cloud provider intra-metro data center peering and aggregation connections
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Enterprise WAN edge high-speed 100G aggregation uplinks
6. Regulatory & Compliance Certifications
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Safety Standards: UL 60950‑1, IEC/EN 60950‑1, CSA C22.2 No.60950‑1
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EMC Compliance: CE Mark, FCC Part 15 Class A, ICES‑003 Class A
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Laser Safety: Class 1 Laser Product conforming to IEC 60825‑1
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Industry Standards: IEEE 802.3bm, SFF‑8665, SFF‑8636
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Environmental Regulation: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
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Cisco QSFP-100G-LR4-S QSFP28 Optical Transceiver
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Hardware Installation Guide
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Safety and Regulatory Documentation
Duplex LC single-mode fiber patch cables sold separately. Cannot be split into independent 25G channels via breakout cables.
Model Comparison Reference
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QSFP-100G-LR4-S: Duplex LC SMF LAN WDM, 10km, native 100G only, commercial temp
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QSFP-100G-LR4-I: Industrial temperature (-40 ~ +85°C) LR4 variant
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QSFP-100G-DR-S: Duplex LC single-mode, 500m reach
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QSFP-100G-FR-S: Duplex LC single-mode, 2km reach
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QSFP-100G-ERL-S: Duplex LC single-mode, 25km extended reach
UNSPSC Classification Code
43222618 – Cisco QSFP-100G-LR4-S LAN WDM long-reach single-mode QSFP28 transceiver with DOM, hot-swappable 100 Gigabit optical module for metro, campus and inter-data-center 100G Ethernet networking.
Hardware Warranty
Genuine Cisco transceivers are covered under Cisco limited hardware warranty. Warranty terms for refurbished units follow respective reseller agreements.
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