Are you facing the challenge of upgrading your network capacity to accommodate the rapid growth of data traffic? Think about getting the best capabilities of 25G Ethernet speed with modules that make it easy to upscale in the future. The right 25G SFP28 modules can help you expand your network capacity, be more energy efficient in your deployments, and simplify your deployments. In this article, we will present the best practices for selecting, deploying, and maintaining 25G SFP28 modules.
Read on for topics such as technical specifications, module compatibility with vendors, performance comparisons, and real-world use cases to make an informed decision to ensure you future-proof your network.
25G SFP28 Modules: Why They Are the Best Choice for Data Center Upgrades
The 25G SFP28 module is an extremely useful tool that acts as a bridge between both 10G and 100G networks when it comes to providing a balanced data center scaling solution. The 25G SFP28 module will provide you with 2.5 times the bandwidth of a 10G SFP+ module while still maintaining a similar form factor, thus enabling you to leverage your current infrastructure without incurring a costly network build-out.
When reviewing the 25G SFP28 against the 10G transceiver, the 25G SFP28 module has significant improvements in scope that include both bandwidth and power efficiencies. The 25G SFP28 module supports higher bandwidth speeds with the potential to consume lower power, which would reduce heat, cut costs, and make the 25G SFP28 module a smarter choice for growing your network capacity while keeping your costs in check.
The 25G SFP28 module also has the unique advantage of being used alongside a 100G QSFP28 module. This provides a future network expansion strategy of modular networking, where 4 x 25G modules can be bundled together as the 100G uplink. It is also a highly scalable method of upgrading your framework, while allowing you to scale your upgrades in a planned and staged approach without accelerating costs or needing to upgrade prematurely to 40G or 100G.
Taking the 25G SFP28 option instead of moving to 40G could preserve your existing wiring and transceiver ecosystem for organizations that may be thinking about growth in silicon but want to avoid premature costs. The 25G rate is the sweet spot for improved speed versus simplistic deployment, especially for data centers that are port-dense, where each additional speed or density adds time until the incremental growth is no longer viable.
Think of 25G SFP28 as the efficient middle lane or front of a freeway, whereas 40G or 100G lanes are the express lanes that operate at a speed only limited to the express lane and not representative of a calm freeway in traffic, allowing for smooth, efficient travel without the complexity of the express lane. Extending your network to include both the technology options of 25G and 100G allows networks to expand the breadth of their platforms and infrastructure in a more thoughtful and sustainable way, balancing performance with budget realities.
25G SFP28 Technical Deep Dive and Selection Decision Framework
In order to understand 25G SFP28 modules, it is essential to review their technical specifications, supported protocols, fiber compatibility, and vendor ecosystem. This understanding will give data center managers and network engineers the ability to select the correct modules for their infrastructure and budget.
25G SFP28 Technical Specifications
25G SFP28 modules typically support protocols including:
- 25GBASE-SR: Designed for short-range fiber optic links, typically distances up to 100–150 meters on multimode fiber.
- 25GBASE-LR: Designed for longer distances, up to 10 kilometers on single-mode fiber.
There are also 25GBASE-ER and 25GBASE-ZR protocols if longer reach is necessary.
Other key parameters include:
- Data Rate: 25 Gbps full duplex, allowing you to run a faster network.
- Wavelength: Each model has a different wavelength (for example, 850nm for the SR and 1310nm for the LR).
- Power Budget: The total amount of transmitter power and receiver sensitivity to maintain the integrity of the signal.
- Connector Type: Each is typically designed to use the LC duplex connector, which is used for fiber optic cables.
Fiber Compatibility
- Multimode Fiber (MMF): Multimode fiber will be used to support the SR protocol for short-range distances. The good news about MMF is it often comes at a cheaper price, but it will not go as far in distance.
- Single-Mode Fiber (SMF): Single-mode fiber will be necessary for the LR and beyond. It allows for long transmission distances and supports better performance in enterprise and metro applications. It is important to select the fiber type that is going to support your data center topology and network architecture goals.
Decision Framework for Selecting 25G SFP28 Modules
When selecting 25G SFP28 modules, you want to consider the following criteria:
Transmission Distance:
- Short distances (<150 m): 25GBASE-SR on multimode fiber.
- Mid to long distances (up to 10km): 25GBASE-LR on single-mode fiber.
- Longer distance: Use higher-quality optics like the ER or ZR optics.
Network Topology:
- For point-to-point links, standard SFP28 modules will work.
- Where networks are more complex and become aggregated, looking for modules that work with scalable QSFP28 uplinks would be beneficial.
Budgeting:
- If you are buying a module just to have a basic function, then a standard module from an OEM or vetted third-party will be suitable.
- If you want to future-proof on load or specific features, tunable optics or better diagnostics, etc., may extend the lifespan of the modules.
Vendor Compatibility and Differentiation
Vendor 25G SFP28 modules can sometimes be difficult to figure out compatibility when there are so many vendors to navigate. Here’s a look at a few of the main vendors, focusing on their advantages and market positioning:
| Brand | Strengths | Compatibility Notes |
| Cisco | Industry-leading with extensive validation, deep firmware integration, and robust security features. | Modules often optimized for Cisco switches; third-party replacements require careful validation. |
| Arista | High-performance modules tailored for large-scale data centers, focusing on low latency and power efficiency. | Wide third-party compatibility; proprietary features enhance interoperability. |
| Juniper | Focus on carrier-grade reliability with strong monitoring abilities and stable firmware support. | Trusted in telecom and enterprise; third-party modules need firmware checks for compatibility. |
| Dell | Cost-effective enterprise solutions with solid performance and broad availability. | Modules broadly compatible; OEM may include custom firmware optimizations. |
| HPE | Balanced focus on enterprise and cloud workloads, offering tunable and fixed optical modules. | Compatibility good with HPE switches; careful selection advised for multi-vendor setups. |
| Brocade | Strong in storage networking and Fibre Channel, with SFP28 modules designed for SAN and Ethernet support. | Specialized firmware for storage networks; check interoperability with multi-vendor environments. |
Evaluation Strategies for Third-Party Modules
Third-party 25G SFP28 modules are usually less expensive; however, these components often require you to investigate the module to determine its compatibility and performance against other alternatives. The following considerations could be helpful in evaluating components:
- Firmware Compatibility: Verify that any vendor-agnostic module will support your firmware on your switch.
- Testing and Certification: Ask a third-party organization or vendors if many of their modules have certification for testing.
- Warranty and Support: Strong support policies lessen the risk of component failures.
- Performance: Compare the latency, error rates, and power consumption to an OEM equivalent.
Visual Decision Tree
Start: Determine network requirements
↓
Transmission Distances?
├─< 150m → Use 25GBASE-SR (Multimode fiber)
└─ ≥150 m → Use 25GBASE-LR or higher (Single-Mode Fiber)
↓
Topology Type?
├─ Point-to-Point → Standard SFP28 Modules
└─ Aggregation or Scalable → May want to check QSFP28 compatibility
↓
Budget?
├─ Standard → OEM or Certified Third-Party modules
└─ Futureproof → Tunable or Diagnostics on the parts
By confirming that module specifications fit with the physical topology and performance requirements of your network, and vendor-specific compatibility, you can help ensure that deployment is seamless and your 25G infrastructure will be reliable for the long haul. This consultation can provide you with the background to help you confidently select 25G SFP28 modules that optimize both current network use cases and future scaling of your network.
25G SFP28 Modules Product Lineup
BYXGD-25G-SFP28-850nm-100M-LC: This 25G SFP28 module provides a high-speed data rate of 25.78G over multimode fiber with a wavelength of 850 nm, operating over a distance of 100 m. The module features a transmit power of -3 to 2.4 dBm, receiver sensitivity of ≤ -10 dBm, VCSEL laser, PIN receiver, extinction ratio > 2 dB, and an LC interface.
BYXGD-25G-SFP28-1310nm-10KM-LC: This module provides a 25.78 G data rate in a single-mode fiber at 1310 nm with a reach of 10 km. The module utilizes a DFB laser, a PIN receiver, and an LC connection. The optical power range supports -5 to 2 dBm, sensitivity is ≤ -11.3 dBm, and the extinction ratio is > 3.5 dB.
Evaluating Performance & Reliability: OEM vs. Third-Party 25G SFP28 Modules
This blog is an exploration into your options when it comes to utilizing OEM (Original Equipment Manufacturer) vs. third-party 25G SFP28 modules and the considerations of performance, cost, compatibility, and warranty that go along with them. Understanding the nuances of these topics is the differentiation between making a well-informed purchase and one that cripples the performance of your network.
Performance Factors
OEM modules are designed specifically for their own equipment, providing assurance of optimum performance wherever the module is being utilized. This includes low latency, consistent data throughput, quality signal integrity, and other performance indicators. OEMs subject their products to rigorous testing in simulated real-world conditions (having the products operate under manufacturer-designated hardware) to reduce the occurrence of sporadic failures.
Third-party vendors can provide comparable performance levels, but most importantly, performance findings may yield variability in function compared to the OEM integral part; this variability depends on the third-party manufacturing standards, materials, and quality standards. Near-OEM performance can be achieved with as close to 100% quality control product verification. Customer reviews and social media commenting on a vendor’s integration of performance checking transparently demonstrate vendor reliability.
Price Differences
| Module Type | Cost | Cost Efficiency |
| OEM | Higher | Premium price justified by integration and support |
| Third-Party | Significantly lower | Attractive for budget-conscious projects |
Generally, third-party 25G SFP28 modules come in 20-50% cheaper than OEM options, which can be a significant budget relief—especially with large deployments! However, it’s important to be cautious, as a low price can raise some concerns when the modules don’t have the same stringent quality controls.
Compatibility & Warranty
OEM modules ensure firmware compatibility and switch integration, which can lead to worry-free operations and troubleshooting. OEMs are also typically more willing to offer extensive warranty options, presenting the opportunity for an immediate replacement and technical assistance.
Third-party modules can vary dramatically in terms of compatibility. Some of the best vendors will have modules that have been tested against several switch platforms, increasing their compatibility options. On the other hand, the warranty may be shorter or less comprehensive, which would add to the risk and the potential cost of upgrades or maintenance.
Visual Comparison Chart
| Aspect | OEM 25G SFP28 | Third-Party 25G SFP28 |
| Latency | Ultra low | Low to moderate |
| Throughput | Consistent high | Near OEM in quality suppliers |
| Power Consumption | Optimized | Varies |
| Firmware Support | Guaranteed | Dependent on vendor |
| Warranty | 1-3 years typical | 6-24 months typical |
| Price | Premium | Affordable |
User Feedback Synopsis
- Network engineers favor OEM modules for their guaranteed uptime and vendor support.
- Third-party modules are praised for potential savings, provided they are sourced carefully so as not to sacrifice too much performance.
- Some user concerns arise from firmware incompatibility from time to time, as well as inferior warranties on lower-tier aftermarket modules.
Choosing the Best Option
Purchasing OEM modules is essentially the same as purchasing a new car with a recognized brand—you are paying a premium for reliability, support from the manufacturer, and guaranteed performance. Choosing to use third-party modules is the same as deciding to use an aftermarket part with recognized quality—cost-effective, but requires a vetting process to avoid compatibility issues.
If the budget allows and maximum reliability within the customer’s network is essential, the OEM is usually the way to go. If the expansion is cost-sensitive and has gone through some vetting process, the 25G SFP28 high-quality third-party modules can provide substantial value.
The analysis of performance and reliability assists network decision-makers in choosing the best fit for deployments, ultimately providing the biggest value between cost-effective pricing and long-term operational performance stability for deploying 25G Ethernet.
25G SFP28 vs 10G SFP+ vs 40G QSFP+: The Ultimate Comparison and Upgrade Plan
Choosing the most appropriate Ethernet module is also determined by bandwidth, cost, port density, and power consumption. These factors can be summarized as: “When comparing 25G SFP28, 10G SFP+, and 40G QSFP modules, which module best fits within your network upgrade?”
Comparison Table
| Aspect | 10G SFP+ | 25G SFP28 | 40G QSFP+ |
| Bandwidth | 10 Gbps | 25 Gbps | 40 Gbps |
| Cost | Lowest | Moderate | Highest |
| Port Density | High (compact ports) | Similar to 10G, allows gradual scale | Lower due to wider ports |
| Power Consumption | Low | Medium | High |
| Upgrade Path | Entry-level to 25G | Balanced step-up to 100G via QSFP28 | High-capacity backbone |
When to Choose 25G Over 10G or 40G/100G?
Upgrading from 10G to 25G can be ideal for data centers needing higher throughput without spending all the money and experiencing all the complexity of 40G. The new 25G interfaces will double speed, keep a similar form factor, and allow you to use cabling more efficiently.
If budgets are tight, or your applications do not need more throughput, 10G will continue to be a viable choice.
If you need to move massive amounts of data, or need dedicated, high-capacity uplink or aggregated backbone, you will want to fit out with 40G or build out with QSFP+ modules that can be used to aggregate multiple 10G or 25G lanes into a single port to continue growth.
Think of 25G SFP28 as the “sweet spot” lane on a highway. It is fast enough to get congestion off the road, it does not break the annual cost budget, and it supports future growth. 10G SFP+ can be used on local highway on-ramps, and it is a good choice where traffic is light, and applications do not demand higher speeds. However, when throughput and capacity drastically increase on 10G highways, QSFP+ should be utilized on the existing infrastructure to handle the heavy utilization.
Now, selecting the optimal modules is a simple proportions problem, meaning the module selection must match the throughput/cost future-proofing all within the growth plan. You will then evolve your network without overpaying for obsolescence or having complexity overbuild its evolution. This strategy assures your business is investing in today, and also in tomorrow’s expected traffic growth.
Case Study and Future of 25G SFP28 Technology
A significant data center operator faced escalating bandwidth challenges as cloud services and virtualization emerged. The challenge was to avoid dealing with the expense and the massive downtimes associated with upgrading the existing infrastructure. 25G SFP28 modules were the solution in this case study.
The data center operator removed all their legacy 10G SFP+ modules and upgraded them to 25G SFP28 modules. This was completed primarily on their aggregated switches and on links to the data center floor. The upgrade provided the same dark-density form factors, with a throughput upgrade of 3x the legacy workload, while approximately only replacing half the cabling versus upgrading legacy 10G cabling with 40G cabling. The primary advantage of this case was that there was really nothing detectable on the traffic, and the business only needed 2-3 hours of disruption time.
You can see the benefits of 25G SFP28 were quantifiable in several areas once the operator received the usage stats, which included:
- Increased bandwidth, which supports 3x throughput and more virtual machines and containers.
- The reduction of around 20% power consumption compared to legacy 40G, or 80% less than using a new switch with 100G interfaces.
- The operator received their return on investment in 18 months, and that was largely pushed back since the need for new cost center upgrades went away.
Moving forward with 25G SFP28 technology, it is easy to see that the good majority of 100G and 400G Ethernet infrastructures will need to evolve with the optical technology upgrades based on improvements from new modulation technology such as PAM4-based modulation. This allows 25G SFP28 to be fully compatible with existing QSFP28 modules, supporting the finalization of continuing to use the structures for higher capacity within the existing growable architecture.
Industry groups are making good steps to ensure industry standards exist for performance and interoperability between vendor solution stacks to enhance further 25G SFP28 offerings. The future looks favorable, with the various 25G developments happening today. We should see 25G become the standard backbone (and growth) link for networks of the near future, especially in relation to cost, speed, and energy inefficiencies.
Again, think of 25G SFP28 as the bridge that remains sturdy in being capable of connecting existing and future-proofed high-speed band-aids as tomorrow comes soon enough. This case shows how 25G SFP28 upgrades can power business growth by helping make sure resources are being used efficiently, and more generally, planning for the use of new optical technology as upgrades.
FAQs
The 25G SFP28 modules maintain the compact form factor of the 10G SFP+ modules. Switching from a 10G SFP+ module to a 25G SFP28 module does not require changing hardware on the switch port.
Many 25G SFP28 modules tout backwards compatibility with 10G SFP+ ports. This allows flexibility for utilizing 10G SFP+ ports during 25G SFP28 deployment; however, performance will be capped at the 10G capability.
Optical budget is determined by the power emitted by the transmitter compared to the sensitivity of the receiver, while factoring in losses due to fiber and penalties due to connectors. The optical budget determines the maximum distance that can be reasonably relied upon for connectivity.
Yes, multiple modules such as the 25GBASE-SR are designed for multimode fiber, while 25GBASE-LR modules are single-mode fiber compatible as well.
Contact Us For The Best Solution
The 25G SFP28 modules strike a careful balance of speed, efficiency, and future readiness for data center upgrades. Moreover, the 25G SFP28 modules provide additional bandwidth, power savings, and will enable further scaling and efficiencies moving forward.
Take a look at some of the 25G SFP28 modules available or speak with your technical specialist to find solutions for your specific needs. Think about the switch and make the swap confidently. You’ll be delighted with the performance upgrade.