Cisco QSFP-40/100-SRBD Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 40/100GBASE SR-BiDi QSFP28 Dual-Rate Bidirectional Multi-Mode Optical Transceiver Module with Digital Diagnostic Monitoring Support
SKU:QSFP-40/100-SRBD
Naming Breakdown
-
QSFP28: Quad Small Form-factor Pluggable 28 hot‑swappable transceiver compliant with QSFP28 MSA specification
-
40/100: Dual-rate operation supporting both 40 Gigabit Ethernet and 100 Gigabit Ethernet
-
SR: Short Reach
-
BD: Bidirectional (BiDi) optical transmission
Key Feature: Operates overonly two strands of duplex multi-mode fiber, enabling customers to reuse existing duplex LC MMF cabling originally deployed for 10G links during network upgrades.
Restriction:No electrical breakout capability. Works as native 40G or native 100G aggregate link only.
Core Architecture:
Adopts bidirectional dual-wavelength VCSEL technology operating at 850 nm and 900 nm. Two optical fibers carry transmit and receive signals simultaneously.
-
100G mode: 4 × 25.78125 Gbps NRZ electrical lanes aggregated into dual 50G bidirectional optical channels
-
40G mode: Compatible with 40GBASE-BiDi standard for seamless interoperation with QSFP+ 40G BiDi modules
Core Product Positioning
The Cisco QSFP-40/100-SRBD is a commercial-grade hot‑swappable QSFP28 bidirectional optical transceiver built for short-reach data center interconnections over multi-mode fiber. It provides a cost-effective upgrade path from legacy 10G duplex LC MMF infrastructure to 40G or 100G without recabling. It is widely deployed for leaf-spine fabric links, rack aggregation connections, and compute pod interlinks within enterprise and cloud data centers. Integrated DOM/DDM enables continuous real-time monitoring of optical operating parameters to simplify routine maintenance and accelerate fault diagnostics.
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 40G / 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
Multi-Mode Fiber (MMF) OM3 / OM4; incompatible with single-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
-
Operating Wavelengths: 850 nm & 900 nm bidirectional VCSEL
-
Electrical Lane Rate: 4 × 25.78125 Gbps NRZ
-
Operating Modes: Native 100GBASE or native 40GBASE; electrical breakout not supported
Maximum Transmission Distance
-
OM3 MMF: up to 70 meters
-
OM4 MMF: up to 100 meters
-
OM3 MMF: up to 100 meters
-
OM4 MMF: up to 150 meters
Optical Power Budget
-
Average Transmit Optical Power: -6.0 dBm ~ +4.0 dBm
-
Minimum Receiver Sensitivity: -12.6 dBm
-
Maximum Allowable Received Optical Power: +2.0 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)
-
Operating Temperature:0°C ~ +70°C (32°F ~ 158°F)
-
Storage Temperature: -40°C ~ +85°C
-
Relative Humidity: 5% – 95%, non‑condensing
-
Maximum Operating Altitude: 3,000 meters
Typical Power Consumption
4. Supported Functional Capabilities
Ethernet Transport
Wire-speed full-duplex dual-rate 40GBASE / 100GBASE BiDi Ethernet; interoperable with Cisco QSFP-40G-SR-BD QSFP+ transceivers. No electrical breakout capability.
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
-
Short-reach leaf-spine fabric 100GE uplinks within cloud and enterprise data center pods
-
Network migration projects reusing existing duplex LC OM3/OM4 multi-mode fiber originally deployed for 10G links
-
Mixed-speed aggregation environments supporting both 40G and 100G interconnections
-
Rack-to-rack compute pod interlinks within 100-meter distance limits
-
High-density enterprise data center access and aggregation layer upgrades
6. Regulatory & Compliance Certifications
-
Safety Standards: UL 60950‑1, IEC/EN 60950‑1, CSA C22.2 No.60950‑1
-
EMC Compliance: CE Mark, FCC Part 15 Class A, ICES‑003 Class A
-
Laser Safety: Class 1 Laser Product conforming to IEC 60825‑1
-
Industry Standards: QSFP28 MSA, SFF‑8665, SFF‑8636
-
Environmental Regulation: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
-
Cisco QSFP-40/100-SRBD QSFP28 Optical Transceiver
-
Hardware Installation Guide
-
Safety and Regulatory Documentation
Duplex LC multi-mode fiber patch cords sold separately. Cannot be electrically split into independent 25G channels.
Model Comparison Reference
-
QSFP-40/100-SRBD: Duplex LC MMF dual-rate BiDi, supports 40G /100G, reuse existing 2-fiber LC cabling
-
QSFP-100G-SR4-S: MPO‑12 MMF parallel optics, requires 8 fibers, supports 4×25G breakout
-
QSFP-100G-SR1.2: Single-rate 100G BiDi LC multi-mode, no native 40G support
-
QSFP-40G-SR-BD: QSFP+ 40G-only BiDi module, interoperable with QSFP-40/100-SRBD
-
QSFP-100G-SWDM4: Four-wavelength multi-mode LC solution, different optical architecture
UNSPSC Classification Code
43222618 – Cisco QSFP-40/100-SRBD dual-rate bidirectional short-reach multi-mode QSFP28 transceiver with DOM, hot-swappable optical module for data center migration and leaf-spine networking.
Hardware Warranty
Genuine Cisco transceivers are covered under Cisco limited hardware warranty. Warranty terms for refurbished units follow respective reseller agreements.
|
