Overview
This module is a high-performance, parallel optical transceiver designed as a fully compatible alternative to the Cisco QSFP-100G-ESR4-S. It adheres to the 100GBASE-ESR4 standard, providing an extended-reach solution for 100 Gigabit Ethernet links over multi-mode fiber. The module integrates four independent 25 Gbps data lanes in each direction, enabling an aggregate bandwidth of 100 Gbps.
Engineered for modern data centers and enterprise networks, this transceiver utilizes a standard MPO-12/UPC connector to transmit data over parallel multi-mode fiber. It reliably supports link lengths up to 200 meters over OM3 MMF and extends to 300 meters over OM4 MMF. Its dual-mode capability allows it to function as a single 100G link or be configured in “breakout” mode to provide four independent 25GBASE-ESR links, offering exceptional deployment flexibility.
Key Features
- 100% compatible with Cisco platforms that support the QSFP-100G-ESR4-S module.
- Standard: Compliant with 100GBASE-ESR4 and QSFP28 MSA.
- Data Rate: 103.1 Gbps aggregate (4 x 25.78 Gbps).
- Connector: MPO-12/UPC connector for parallel optics.
- Reach: Up to 300m over OM4 Multi-Mode Fiber (MMF).
- Wavelength: 850nm VCSEL array.
- Breakout Capability: Natively supports 4x25G-ESR mode for connecting to 25G SFP28 ports.
- Built-in Digital Optical Monitoring (DOM/DDM) for real-time performance diagnostics.
- Hot-pluggable QSFP28 electrical interface.
- Low power consumption, typically under 3.5W.
Applications
The QSFP-100G-ESR4-S compatible module is the perfect solution for:
- High-density 100 Gigabit Ethernet links in data centers and server farms.
- Switch-to-switch aggregation and core layer connections.
- 4x25G Breakout: Connecting a 100G switch port to four separate 25G server or storage NICs.
- High-performance computing (HPC) clusters and interconnects.
Specifications
| Parameter | Value |
|---|---|
| Compatible Part Number | QSFP-100G-ESR4-S |
| Form Factor | QSFP28 |
| Standard | 100GBASE-ESR4 |
| Data Rate | 103.1 Gbps |
| Wavelength | 850nm |
| Max Distance | 200m (OM3) / 300m (OM4) |
| Fiber Type | Multi-Mode Fiber (MMF) |
| Connector Type | MPO-12/UPC |
| DOM/DDM Support | Yes |
| Operating Temperature | 0°C to 70°C (32°F to 158°F) |
Cross-Platform Compatibility
Programmed specifically for Cisco devices, this module’s adherence to MSA (Multi-Source Agreement) standards ensures it can also be used in a wide variety of networking equipment from other leading manufacturers that require 100GBASE-ESR4 compliant transceivers.
| MANUFACTUFACTURER | EQUIVALENT PART NUMBER |
|---|---|
| Arista | QSFP-100G-ESR4 |
| Juniper | JNP-QSFP-100G-ESR4 |
| Mellanox/NVIDIA | MMA1L30-CM |
| MSA Generic | QSFP-100G-ESR4 |
FAQ (Technical & Product Questions)
1. What is 100GBASE-ESR4 and how is it different from 100GBASE-SR4?
Both are parallel optics standards for 100G over multi-mode fiber using an MPO connector. The key difference is the reach. 100GBASE-SR4 is the standard for shorter distances, officially supporting up to 70m on OM3 and 100m on OM4 fiber. 100GBASE-ESR4 (“Extended Reach”) is a specification that extends this distance, enabling reliable links up to 200m on OM3 and 300m on OM4, making it suitable for larger data center deployments.
2. Can this QSFP-100G-ESR4-S module break out into four 25G links?
Yes, absolutely. This module is designed to support breakout applications. Using an MPO-to-4xLC Duplex breakout cable, you can connect this single QSFP28 port to four separate SFP28 ports running at 25G, with each link capable of reaching the full 300m distance.
3. What kind of fiber cable do I need for this module?
You need a multi-mode fiber cable with an MPO-12/UPC connector (female). For maximum performance and to achieve the 300m distance, OM4 rated fiber is required. It is also backward compatible with OM3 fiber, but the maximum link distance will be reduced to 200 meters.
4. Is this module compatible with a QSFP+ 40G module?
No. While they use the same MPO-12 connector and parallel optics concept, they are not interoperable. This QSFP-100G-ESR4-S operates with four 25G lanes (100G total), while a 40G QSFP+ module like 40GBASE-SR4 operates with four 10G lanes (40G total). They cannot be directly connected.
5. What does the “-S” in the part number QSFP-100G-ESR4-S signify?
In Cisco’s part numbering, the “-S” suffix typically designates that the part is “S-Class,” meaning it is intended for standard enterprise and data center applications and meets a specific set of feature and compliance requirements defined by the manufacturer. It is functionally a standard 100GBASE-ESR4 module.
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