Data center: 25G, 40G, 100G, which is the best solution?
2017-10-04
Which things must be concerned on Internet + times, the answer is undoubtedly the “big data”, and the data center is the key to the success of large data strategy, need to keep pace with the times. Although 10G Ethernet has been the most cost-effective, high-performance interconnect in the data center server network in recent years, with the explosive growth of cloud computing, Internet of Things (IoT), and high throughput supported by servers and storage solutions Data center bandwidth needs to grow in order to meet the current and future cloud mass data flow needs. But for the data center, there are multiple options to choose from, 25G, 40G, 100G, which is the best solution?
Which things must be concerned on Internet + times, the answer is undoubtedly the “big data”, and the data center is the key to the success of large data strategy, need to keep pace with the times. Although 10G Ethernet has been the most cost-effective, high-performance interconnect in the data center server network in recent years, with the explosive growth of cloud computing, Internet of Things (IoT), and high throughput supported by servers and storage solutions Data center bandwidth needs to grow in order to meet the current and future cloud mass data flow needs. But for the data center, there are multiple options to choose from, 25G, 40G, 100G, which is the best solution?
ODCC first introduced the 25G ToR switch specification and released details
While the industry is still enthusiastic about 25G can bear the burden of time, for the industry there is no clear 25G TOR switch product technical specifications, China’s ODCC (Open Data Center Committee) pioneered the specification of 25G TOR switches based on different business scenarios, fully considered in terms of reliability, flexibility, energy efficiency levels, cost and so on, enhanced in remote diagnostics and operational dimension functions, and unified the CPU platform and hardware platform, Details of the specification have recently been published on the ODCC website. ODCC’s TOR specification is based on the needs of network demand from Chinese Internet Enterprise Data Center represented by Baidu and Ali, and the 25G TOR hardware specifications are clearly stated in the industry, and also indicated the product development roadmap for the related OEM/ODM supplier. As the deployment of 25G networks progresses, the technical specification may be further refined or adjusted to meet business requirements.

ODCC’s TOR specification is based on the needs of network demand from Chinese Internet Enterprise Data Center represented by Baidu and Ali, and the 25G TOR hardware specifications are clearly stated in the industry, and also indicated the product development roadmap for the related OEM/ODM supplier. As the deployment of 25G networks progresses, the technical specification may be further refined or adjusted to meet business requirements.The 25G TOR specification derives from the demand for new technologies that require a faster number of users and have a demonstration effect for other users. China’s first 25G network-scale deployment is expected to begin in the first half of 2017, with larger deployments expected to occur in 2018. Companies that offer large-scale IAAS cloud services are expected to be more aggressively deploying 25G networks. This specification fully confirms the industry for the 25G as the future development of the mainstream technology unified recognition. The introduction of the standard for the overall data center to 25G upgrade will promote the role of large-scale deployment and application in China.

The 25G TOR specification derives from the demand for new technologies that require a faster number of users and have a demonstration effect for other users. China’s first 25G network-scale deployment is expected to begin in the first half of 2017, with larger deployments expected to occur in 2018. Companies that offer large-scale IAAS cloud services are expected to be more aggressively deploying 25G networks. This 25G TOR specification fully confirms the industry for the 25G as the future development of the mainstream technology unified recognition, the introduction of the standard for the overall data center to 25G upgrade to promote the role of large-scale deployment and application in China can be expected.

25G becomes a 10G Ethernet baton
Why can 25G become a 10G Ethernet baton? On the one hand, although four 10GbE physical channels can be aggregated to achieve 40GbE, or aggregate 10x 10G channels to achieve 100G speed, these solutions are more expensive and more expensive and more power-efficient than 25G. On the other hand, compared to 10G, the 25G scheme offers the advantage of enhanced computing and storage efficiency, providing higher bandwidth, faster connections, and running two 25G channels to achieve 50G, or running four channels to achieve 100G, when transition to the next generation of its capital and operating expenses to be relatively balanced. Moreover, 25GbE is backward compatible, can communicate with 10G, so add a new server, you can still work with existing network equipment. It is easy to migrate, cost/performance balance and real-time visibility of the network, etc. So it will push the next generation of data to 25G transition to take advantage of its faster port speed and cost curve.

Global deployment of 25G technical specifications
25G is recognized as the industry standard for next-generation server access rates, and related technical specifications such as 25G TOR switches and AOC cables are urgently needed to be finalized, and global organizations are actively competing to take the initiative. In the global data center industry, the Chinese manufacturers in the forefront, Baidu, Ali took the lead. The ODCC (Open Data Center Committee), launched by Baidu, Tencent, Alibaba, China Telecom, Chinese Mobile, Shun Tong, and Intel, has become an important force in the rapid rise. International organizations are of course also concerned about it. It is reported that the Institute of Electrical and Electronic Engineers (IEEE) has introduced four new Ethernet standards for 25G and IoT applications, and the new Standard group includes IEEE802.3BP, IEEE802.3BR, and IEEE802.3b. and IEEE802.3b introduces a full range of 25Gbps physical Layer (PHY) specification.
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