With the increasing demand of data center for bandwidth, the network rate is developing towards a higher rate, and there is bound to be the need for network upgrading. There are two upgrade paths for the network from 10G to 100G, namely 10G-25G-100G and 10G-40G-100G. End users seem to prefer 25G. Why? ETU-LINK will tell you.

All this can be said from the rise of 25 Ethernet. Data center TOR switches have generally been switched to 10G. With the development of virtualization and cloud computing, IEEE approved 40G and 100G standards to meet higher bandwidth requirements. However, switching the data center TOR switch to 40G requires a higher cost and will cause a certain amount of power consumption, and it is quite difficult and more costly to directly deploy 100G.

Therefore, based on the IEEE 100GbE standard, IEEE 802.3 has formulated a new 25G Ethernet standard, a single channel can achieve a 25Gbps rate, and a 100G transmission can be achieved through 4*25Gbps, which reduces the upgrade cost to a certain extent and brings convenience to the data center upgrade.

The common interconnection products of 25G Ethernet include 25G SFP28 optical module, AOC active optical cable and DAC high-speed cable. Etu-link's 25G SFP28 optical module has a variety of different specifications, such as 25G multimode optical module, transmission distance 100m, single-mode optical module 10km-40km. In addition, 25G DAC and 25G AOC are mainly used for the connection between switches on the rack.

25G Ethernet can make up for the problems of insufficient bandwidth of 10G Ethernet and high cost of 40G Ethernet. 25G Ethernet has excellent switch I / O performance and structure capability, and its speed is 2.5 times of 10G, which can increase the switch port density and scalability. Secondly, compared with 40G, by reducing the number of switches, power supply, cooling and wiring equipment, it can reduce capital expenditure and operating expenditure In addition, the 25G standard is built on the 100G standard, which can realize 100G through four 25Gbps channels, reducing the cost of the switch.

In the past few years, 25G Ethernet has gained more and more recognition, especially since the deployment of 5G network. 25G optical modules and other products have been greatly developed, 25G servers can also run at 10G speed, 25G switches provide a more convenient way to upgrade the network, and 25G is expected to have a broader market in the future.