Following the establishment of an industry alliance to promote 25Gbps Ethernet technology for data center applications (reference link), the IEEE's 802.3 working group recently held a formal vote to prepare standards for 25G Ethernet (25GE).
At the IEEE meeting in mid-July, 121 of the 148 participating engineers agreed that a working group should be set up to begin the interface standard between the large data center rack server and the top-of-rack switch; 59 attending engineers said they would join the working group and representatives from 39 companies expressed interest in the new standard. However, in the informal opinion survey of the IEEE meeting in March, only 30 engineers believed that 25GE standards should be set, 27 opposed, and 21 abstained; at that time, representatives from 25 companies expressed their views on the new standard. support.
A discussion at the IEEE conference, representatives from Broadcom, Cisco, Dell, Intel and Microsoft, also fully demonstrated the availability of the newly emerging 25G SerDes. Technology, let 25G Ethernet network become the reason for the next step of today's 1/10G Ethernet link standard.
25GE locks the connection between the server and the switch
In addition to the above-mentioned symposium members, they voted for engineers who promoted the 25GE standard, including representatives from companies such as Applied Micro, Avago, Fujitsu, Hewlett-Packard, Juniper, Marvell and ZTE. According to Rochan Sankar, Director of Product Marketing at Broadcom Networks, compared with the March meeting, the industry representative held a further discussion on the details of 25GE technology use scenarios and economic issues at the recent IEEE conference.
Proponents say 25G Ethernet technology helps reduce the number of top-of-rack switches required for large data centers
The concept of a single 25GE line is based on the IEEE 100G Ethernet 4x 25G specification and the 25G standard set by the industry organization OpTIcal Internetworking Forum. In June, the 25G Ethernet ConsorTIum, initiated by ArTIsta, Broadcom, Google, Mellanox and Microsoft, has completed a set of specifications available to alliance members; Brocade and Dell have recently become members of the alliance. .
Market observers believe that 10G Ethernet is just getting started in server applications, but will become mainstream in 2018.
The 25G Ethernet Alliance is expected to attract more vendors to support its specifications, but some parts of its specifications may be revised; Broadcom's Sankar said: "There may be some small details to be run in;" but he is optimistic that IEEE The new working group to be established will reach a single standard consensus with the alliance. The 25G Ethernet Alliance also promotes the adoption of 50G Ethernet specifications for dual 25G SerDes lines, and the IEEE will decide whether to adopt its concept at the September meeting.
25G Ethernet network has been included in a series of standards including 100GE
Sankar pointed out that the 25G Ethernet Alliance's specification locks copper as the lowest cost medium for server racks, but alliance members such as Mellanox also explore the possibility of using xenon technology. Broadcom also believes that the photon technology is more suitable for applications where the rack and the aggregation switch are more than 30 meters away. However, within 3 meters or a single server rack, the single-line 25G solution for copper wire is already at a minimum. Cost option.
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