Cisco CPAK-100G-FR Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 100GBASE-FR CPAK Hot-Swappable Single-Lambda Single-Mode Optical Transceiver Module with Digital Optical Monitoring Support
SKU:CPAK-100G-FR
Naming Breakdown
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CPAK: Cisco Parallel Attached Kit, proprietary hot-pluggable 100G transceiver form factor built for Cisco high-density 100G line cards
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100G: Aggregate 100 Gigabit Ethernet bandwidth
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FR: Forward Reach, single-lambda 100GBASE-FR optical standard compliant with 100G Lambda MSA
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No suffix: Standard commercial temperature-grade variant (0°C ~ +70°C operating temperature)
Core Architecture
Single-wavelength PAM4 modulation architecture, operating within 1304.5 nm ~ 1317.5 nm window. Aggregate 100G signal is transmitted over one transmit fiber and received over one receive fiber without internal wavelength multiplexing. Implements uncooled DML transmitter and high-sensitivity PIN photodiode receiver.
Critical Restriction:No electrical breakout capability. Operates only as native aggregated 100G link.
Protocol Support: 100 Gigabit Ethernet; OTU4 OTN transport supported on compatible routing/transport platforms.
Core Product Positioning
The Cisco CPAK-100G-FR is a commercial-grade hot‑swappable CPAK optical transceiver optimized for cost-effective short-reach 100 Gigabit single-mode interconnections inside data centers. Adopting single-lambda PAM4 design, it simplifies optical system architecture compared with multi-wavelength CWDM4 and LR4 modules, supporting links up to 2 km for leaf-spine fabric uplinks, intra-pod aggregation and short-distance data center interconnect (DCI). CPAK achieves higher port density and lower power consumption than legacy CFP/CFP2 transceivers. Built-in DOM enables continuous real-time monitoring of optical operating parameters to simplify routine maintenance and accelerate fault troubleshooting.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Nexus 7000 / Nexus 7700 Series switches equipped with F3-series 100G line cards (N7K-F306CK-25);
ASR 9000, CRS-X, NCS 2000 / 4000 / 6000 Series routing and transport platforms.
Verify Cisco official transceiver compatibility matrix and minimum required firmware release prior to deployment.
Supported Operating Systems
NX-OS, IOS-XR releases supporting CPAK transceiver recognition, DOM monitoring and 100GBASE-FR interface operation.
Supported Fiber Media
Single‑Mode Fiber (SMF) G.652 (OS2, 9/125μm) only; incompatible with multi-mode fiber.
Connector Type
Duplex LC/UPC optical connector
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable proprietary CPAK form factor
Dimensions: 11.6 × 34.8 × 101.2 mm
Optical Interface
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Operating Wavelength Window: 1304.5 nm ~ 1317.5 nm single lambda
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Electrical Interface: Aggregate 100 Gbps PAM4
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Modulation Scheme: PAM4
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Transmitter: Uncooled DML; Receiver: PIN photodiode
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Operating Mode: Native 100G only; breakout function disabled
Maximum Transmission Distance
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Up to2 kmover standard G.652 OS2 single-mode fiber
Optical Power Budget
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Average Transmit Optical Power: −3.1 dBm ~ +4.0 dBm
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Minimum Receiver Sensitivity: −7.1 dBm
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Maximum Allowable Received Optical Power: +4.0 dBm
Digital Diagnostics
DOM / Digital Optical Monitoring Supported (SFF-8472)
Monitors internal module temperature, supply voltage, laser bias current, transmit optical power and received 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 100GBASE-FR PAM4 Ethernet; supports OTU4 OTN mapping on applicable routing platforms; 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 Nexus and ASR platforms; supports link redundancy via port-channels and spanning tree protocols
Operations & Management
NX-OS / IOS-XR command-line interface, SSH, SNMP v2c/v3, Syslog logging
5. Typical Deployment Scenarios
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Short-reach 100GE leaf-spine fabric uplinks within the same data center building (<2km)
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Intra-pod aggregation interconnections over duplex LC single-mode trunk cabling
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Cost-sensitive short-range DCI between adjacent buildings in one campus
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High-density 100G port deployments on Nexus 7000/7700 F3 switching platforms
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Network scenarios preferring single-lambda simplified optics instead of CWDM4 multi-wavelength design
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: 100G Lambda MSA specification, SFF‑8472 DOM standard
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Environmental Regulation: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
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Cisco CPAK-100G-FR CPAK Optical Transceiver
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Hardware Installation Guide
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Safety and Regulatory Documentation
Duplex LC single-mode patch cords sold separately. Cannot be electrically split into independent sub-rate channels.
Model Comparison Reference
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CPAK-100G-FR: CPAK Duplex LC single-lambda PAM4 SMF, max 2km
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CPAK-100G-CWDM4: CPAK Duplex LC 4-lane CWDM NRZ SMF, max 2km multi-wavelength
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CPAK-100G-PSM4: CPAK MPO‑12 APC parallel SMF, max 500m, parallel fiber architecture
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CPAK-100G-LR4: CPAK Duplex SC LAN-WDM SMF, max 10km cooled EML long-reach
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CPAK-100G-SR4: CPAK MPO‑12 UPC parallel multi-mode, max 100m (OM4)
UNSPSC Classification Code
43222618 – Cisco CPAK-100G-FR short-reach single-lambda PAM4 single-mode CPAK transceiver with DOM, hot-swappable 100 Gigabit optical module for simplified intra-data-center leaf-spine, aggregation and short-range DCI networking on Nexus 7000/7700 and ASR9000 platforms.
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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