SFP28 vs SFP+, how to choose?
Do you possess knowledge regarding the similarities and distinctions between SFP+ vs. SFP28? SFP+ and SFP28 belong to the SFP family of transceiver form factors, but they differ from each other. SFP+ is an improved version of SFP, whereas SFP28 is an even more advanced iteration of SFP+. However, what sets SFP+ and SFP28 apart from each other and what are their fundamental characteristics? In this article, we provide a concise overview of 10G and 25G Ethernet (25GbE) technologies, with a particular emphasis on the SFP+ and SFP28 transceivers. Continue reading to deepen your understanding of SFP28 vs. SFP+.
QSFPTEK SFP+ & SFP28 Transceivers
SFP+ Overview
Definition of 10G SFP+
The SFP+ is an upgraded variant of the SFP and its features are derived from SFF-8431. Typically, SFP+ modules support 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet and the Optical Transport Network standard OTU2, and are extensively used in modern applications. Compared to the earlier 10 Gigabit Ethernet XENPAK or XFP modules, the SFP+ module is smaller in size and has become the most favored 10 Gigabit Ethernet module in the market.
Table 1 -QSFPTEK 10G SFP+ Series Fiber Optic Transceivers
Benefits of SFP+ Transceiver
QSFPTEK SFP+ module details
1. High Speed: It provides a significantly higher speed that is capable of meeting the rapidly growing data traffic demands.
2. Hot Pluggable: The SFP+ module is designed to be hot-pluggable, which means it can be easily expanded or modified without having to completely change the existing cable infrastructure.
3. Compact Size: Despite having the same size and appearance as the standard SFP module, the 10G SFP+ module has a compact design that allows for high port density and saves space.
4. Lower Cost: The SFP+ transceiver is one of the most successful form factors in the industry and has a great shipment. As a result, there are plenty of suppliers providing it at a lower cost.
5. Comprehensive Interoperability: Its optical compatibility allows it to interoperate with traditional XFP, X2, and XENPAK modules, making it an efficient way to upgrade old cabling to modern networking.
Applications of SFP+ modules
SFP+ modules are a versatile and widely used solution for high-speed data transmission in various applications.Here are some common applications of SFP+ modules:
1. Data Center Networking: SFP+ Optical Transceivers are commonly used in data center networking for high-speed data transmission between servers, switches, and storage devices. They support Ethernet, Fibre Channel, InfiniBand, and other protocols, making them a versatile choice for various applications.
2. Telecommunication Networks: 10G SFP+ Transceiver modules are also used in telecommunication networks for long-distance transmission of data and voice traffic.
3. Wireless Networking: SFP+ optic can be used in wireless networking applications, such as connecting wireless access points to switches, or in point-to-point wireless links using fiber optic cables.
4. Video Broadcasting: SFP+ modules are also used in video broadcasting applications to transport high-quality video signals over long distances. They are commonly used in TV studios, OB vans, and outside broadcast events.
5. Industrial Networking: SFP+ can be used in industrial networking applications, where they are required to operate in harsh environments with high temperature, shock, and vibration. They are often used in oil and gas, power generation, and transportation industries.
SFP28 Overview
Definition of 25G SFP28
The SFP28, short for Small Form-Factor Pluggable 28, is the third iteration of the SFP interconnect systems that comply with the IEEE 802.3 by specification (25GBASE-CR) for optimal 25G performance. Its range of products includes SFP28 transceivers, SFP28 DACs, SFP28 AOCs, and SFP28 ports. Its name is derived from its maximum transmission rate of 28Gbps and is essentially an upgraded version of SFP+ for 25G connectivity, sharing the same form factor and appearance, but featuring support for 25Gbps to 28Gbps electrical interfaces per channel.
Table 2 -QSFPTEK 25G SFP28 Series Fiber Optic Transceivers
Benefits of SFP28 modules
The adoption of 25G SFP28 offers significant advantages to system operators in terms of network performance, enabling them to meet the growing bandwidth demands of data centers.
1. Achieve 5x faster throughput for business applications and services, while enjoying similar economic benefits as with 10GbE.
2. Ensure infrastructure readiness for the future and maintain backward compatibility with 10G, making migration to 100G easier.
3. With its compatibility with 10G cables, switching to 25G does not necessitate any upgrades to cabling infrastructure.
4. Utilize the economic advantages of an open network architecture, enabling cost savings and revenue generation.
5. Deploying SFP28 to build 25G networks can significantly reduce the number of switches and cables required, as well as space, power, and cooling costs, compared to 10G and 40G technologies, thereby decreasing capital and operating expenses.
Applications of 25G SFP28 Transceivers
SFP28 modules are ideal for any application that requires high-speed network connectivity and reliable data transfer， Here are some of the common applications of SFP28 modules:
1.Data center interconnects: SFP28 optics are commonly used for high-speed interconnects within data centers, allowing for faster data transfer between servers, storage devices, and networking equipment.
2. Cloud computing: 25Gbps SFP28 can be used for high-speed connections between cloud servers and storage devices, enabling faster data access and retrieval.
3. High-performance computing (HPC): 25G SFP28 is used in HPC environments to enable high-speed network connectivity between nodes in a cluster, allowing for faster processing and data transfer.
4. Telecommunications: SFP28 modules are used in telecommunications networks for high-speed connections between routers, switches, and other networking equipment.
5. Video streaming: SFP28 transceivers are used in video streaming applications to enable high-speed data transfer between servers and storage devices, ensuring that video streams are delivered smoothly and without interruption.
6. Virtual reality (VR) and augmented reality (AR): SFP28 is used in VR and AR applications to enable high-speed data transfer between servers and end-user devices, ensuring that immersive experiences are delivered without lag or latency.
SFP28 vs. SFP+, What is the difference？
The SFP+ and SFP28 share the same physical appearance and mating compatibility, but they differ in their performance capabilities. While the former is appropriate for 10G speeds, the latter is optimized for 25G speeds, providing superior impedance control, reduced crosstalk, and increased bandwidth. In addition, the SFP28 transceiver and DAC cable outperform their SFP+ counterparts, offering significantly greater bandwidth and lower loss.
A detailed comparison between SFP28 and SFP+ is enlisted in the below table
SFP28 vs. SFP+, which one is better for you
The choice between SFP28 and SFP+ depends on the specific requirements of your networking application.
1.Bandwidth: SFP28 offers higher bandwidth than SFP+. SFP+ can support up to 10 Gbps while SFP28 can support up to 25 Gbps. If you need higher bandwidth for your network, SFP28 is the better choice.
2. Distance: SFP28 is designed for shorter distances than SFP+. If you need to transmit data over longer distances, SFP+ is the better choice.
3. Power consumption: SFP28 consumes less power than SFP+. If you have a large number of transceivers in your network, choosing SFP28 can help reduce power consumption and save on energy costs.
4. Cost: SFP28 is typically more expensive than SFP+. If cost is a concern, you may want to consider SFP+ instead.
5. Compatibility: SFP28 is backward compatible with SFP+. If you already have SFP+ equipment in your network, you can use SFP28 transceivers with it.
6. Future-proofing: If you're planning to upgrade your network in the future, choosing SFP28 may be a better option as it offers higher bandwidth and is likely to be supported by future networking technologies.
Frequently Asked Question
Q1: What is the maximum transmission distance of the 25G SFP28 optical module?
A: At present, the maximum transmission distance of the SFP-25G-ER model optical module is 40km in theory. We do not rule out that there will be longer transmission distance 25G optical modules in the future.
Q2: Can different brands of 25G SFP28 optical modules be interoperable?
A:25G optical modules can be interoperable as long as they meet the industry standard specifications.
Q3: Can SFP28 optical modules be inserted into SFP+ ports?
A: Yes, the SFP28 is compatible with SFP+ ports and can function fully. However, it is important to confirm that the SFP28 transceiver supports dual rates of 10G/25G, meaning that it is a 10G/25GbE SFP28.
Q4: Can SFP+ optical modules be inserted into SFP28 ports?
A: Using an SFP+ transceiver in an SFP28 port is not possible as the SFP28 port operates at a higher data rate of 25G or 32 GFC, while SFP+ transceivers usually support a maximum data rate of 10G. Nevertheless, if the switch permits configuring the port's data rate to 10Gbps, the SFP+ transceiver may be used in the SFP28 port, which will function as a standard 10G SFP+ port under such circumstances.
Conclusion
Summing up SFP+ vs. SFP28, when choosing between SFP28 and SFP+ transceivers, it is essential to consider the specific requirements of your networking application. While SFP+ is a more established technology, SFP28 offers higher data rates and improved performance. If you require faster data rates or need to future-proof your network for upcoming technologies, SFP28 may be the better choice. However, if your current infrastructure is based on SFP+ and your network does not require speeds beyond 10 Gbps, sticking with SFP+ may be a more cost-effective option. Ultimately, the decision should be based on carefully evaluating your network's needs and capabilities.
share
