With the rise of cloud computing, big data, mobile Internet and smart cities, the data traffic of the Internet is under explosive growth. Operators urgently need to upgrade their existing data centers to cloud data centers to provide more flexible services and applications . Today's data centers are primarily based on 10G Ethernet architectures and in order to be able to handle the increasing data load, these data centers must scale with increased bandwidth capabilities parallel to existing infrastructures. Interestingly, operators are now preferring evolution paths from 10G→25G→100G, compared with the well-known 10G→40G→100G upgrade path. Why 25G can replace 40G as a 10G relay baton?

As long as the 25G and 40G standards for a simple comparison, we can also draw 25G evolution path is better than the 40G upgrade route judgment. On the one hand, while 40G can be achieved by aggregating four 10GbE physical channels or 10 10GbE channels can be aggregated to operate at 100G speeds, these solutions are more expensive and consume more power than 25G. On the other hand, the 25G solution offers the advantages of increased compute and storage efficiency over 10G, providing higher bandwidth, faster connections and running two 25G lanes for 50G or running four lanes for 100G The transition to the next generation of networks, its capital and operating expenditures should be relatively balanced. More importantly, the 25GbE is backwards compatible and can communicate with 10G, so adding a new server can still work with existing network equipment, helping network operators more easily expand their data center. Due to the above significant advantages, there is a great rationale for the 25G solution to become the trend of 10G baton.

At present, the optical modules suitable for 25G Ethernet in the industry mainly have two kinds of package styles, namely SFP28 (1x25Gbps) and QSFP28 (4x25Gbps). Among them, SFP28 optical module is based on SFP + package, can provide 25Gb / s error-free transmission, in the four types of multimode fiber transmission distance up to 100 meters, and can be applied to high-density 25G Ethernet switches and networks Road interface, thus providing operators with more cost-effective solutions for upgrading 10G Ethernet. The QSFP28 optical module, on the other hand, provides four 25Gbps high-speed signaling channels and is used in high-density 25G Ethernet switches and network interfaces to provide a smooth upgrade of the data center to 100Gbps Ethernet (4x25Gbps) evolution .

In the future, the demand for higher speeds and performance will never stop in the data center . Looking back the evolution of 25G over the past few years, you will find that the emergence of 25G is a milestone in the expansion of next-generation data center network bandwidth and channel capacity. ETU-Link long-term deep-cultivation module development and production, providing a variety of optical modules, such as 1.25G, 10G, 25G, 40G, 100G, etc., can meet the various needs of operators to upgrade data centers. For more details, please visit the official website of ETU-Link: www.etulinktechnology.com