Cisco QSFP-100G-SR4-S Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 100GBASE-SR4-S QSFP28 Parallel Short-Reach Multi-Mode Optical Transceiver Module with Digital Diagnostic Monitoring Support
SKU:QSFP-100G-SR4-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 electrical lanes) for 100 Gigabit Ethernet
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SR4: Short Reach, four-lane parallel optical transmission based on IEEE 802.3bm 100GBASE-SR4 standard
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S: Standard commercial temperature variant, Cisco enterprise-grade SKU
Core Architecture: Four independent 25G NRZ optical channels operating over parallel multi-mode ribbon fiber via MPO‑12 connector.
Key Feature: Supports dual operation modes — native 100G Ethernet or breakout into four independent 25GBASE-SR channels when paired with MPO-to‑4×LC breakout cables.
Core Product Positioning
The Cisco QSFP-100G-SR4-S is a commercial-grade hot‑swappable QSFP28 parallel optical transceiver optimized for short-reach high-density 100 Gigabit Ethernet inside data centers. It delivers cost-effective 100G connectivity for leaf-spine fabric uplinks, ToR switch aggregation, and server rack interconnections over parallel multi-mode fiber. Flexible breakout capability enables smooth migration between 100G and 4×25G topologies without hardware replacement. Integrated DOM/DDM provides continuous real-time monitoring of critical optical parameters for simplified operation and fault diagnostics.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Nexus 3000 / 9000 Series Switches; Catalyst 9500 / 9600 Series Switches; ASR 1000 Series Routers 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
Laser‑optimized 50/125μm multi-mode fiber (MMF) only. Incompatible with single-mode fiber.
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OM3 MMF: Maximum reach of 70 meters
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OM4 / OM5 MMF: Maximum reach of 100 meters
Connector Type
MTP/MPO‑12 male parallel optical connector
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable QSFP28, compliant with SFF‑8665 MSA
Optical Interface
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Nominal Operating Wavelength: 850 nm VCSEL array
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Electrical Lane Rate: 4 × 25.78125 Gbps NRZ, aggregate 103.125 Gbps
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Dual Operation Modes: Native 100GBASE-SR4 or breakout to 4 × 25GBASE-SR
Maximum Transmission Distance
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OM3 Multi-Mode Fiber: Up to 70 m
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OM4 / OM5 Multi-Mode Fiber: Up to 100 m
Optical Power Budget (per individual lane)
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Average Transmit Optical Power: -8.4 dBm ~ +2.4 dBm
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Minimum Receiver Sensitivity: -10.3 dBm
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Maximum Allowable Received Optical Power: +2.4 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-SR4 Ethernet; supports flexible breakout to 4 × 25GBASE-SR
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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Short-distance 100GE inter-switch uplinks within leaf-spine data center fabrics
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Top-of-Rack switch aggregation uplinks in high-density server environments
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Network migration projects: 100G QSFP28 port breakout to four independent 25G SFP28 links
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Enterprise and cloud data center intra-rack and inter-rack 100G connectivity
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High-performance computing (HPC) cluster short-reach parallel fiber interconnections
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-SR4-S QSFP28 Optical Transceiver
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Hardware Installation Guide
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Safety and Regulatory Documentation
MPO‑12 multi-mode ribbon cables and MPO-to‑4×LC breakout cables sold separately.
Model Comparison Reference
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QSFP-100G-SR4-S: MPO‑12 MMF parallel optics, 70m (OM3) / 100m (OM4), supports native 100G and 4×25G breakout
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QSFP-100G-SL4: Short-link MPO MMF variant with shorter transmission reach
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QSFP-100G-SR1.2: Duplex LC BiDi multi-mode 100G transceiver, no breakout capability
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QSFP-100G-CWDM4: Duplex LC single-mode 2km WDM transceiver
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QSFP-100G-LR4: Duplex LC single-mode 10km CWDM transceiver
UNSPSC Classification Code
43222618 – Cisco QSFP-100G-SR4-S parallel short-reach multi-mode QSFP28 transceiver with DOM and breakout capability, hot-swappable 100 Gigabit optical module for high-density data center leaf-spine fabric 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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