Can the status quo of Ethernet switches be changed?

Ethernet includes three network interfaces: RJ-45, BNC and AUI, the transmission media used are: twisted pair wire, thin coaxial cable and coarse coaxial cable, after reading this article you certainly have a lot of GAINS, I hope this article will teach you more things.

More work needs to be done for manufacturers to use Ethernet in large-scale data centers. According to users attending the Ethernet Technology Summit in San Jose this week, Ethernet can be greener and "more structured ". This indicates that the recent efforts by manufacturers and standards organizations to enhance and reduce the power consumption of data center Ethernet switches and routers are still incomplete. These efforts include IEEE-implemented data center bridging and Cisco's next-generation Nexus platform.

Facebook engineer Donn Lee says the biggest and best switch you can buy is still too small. We must combine a huge 10g link array to expand the scale. The switch is not made for this structure. Lee said Facebook is the fourth largest website in the world after Google, Microsoft, and Yahoo. Facebook is still growing. The number of users of this social network website has increased from 50 million to 0.4 billion in the past two years.

But there is no Ethernet pain point for this growth, says Lee. Facebook has a warehouse-sized data center running many racks of PCs, each of which has 20 to 40 PCs. All PCs run quad-core processors.

Each PC is configured with a 1 GB Ethernet NIC per second, and each server cabinet has 40 GB of traffic per second. Lee said that we must use 10G devices to connect to many 10G devices, aggregate switches, and send communications back to the core of a 0.7 million-square-foot data center. This is why Facebook says it needs Gbit/s Ethernet switch or even Terabit (megabits) switch.

However, G Ethernet and Terabit Ethernet won't appear in a short time. Therefore, Facebook must use 10G Ethernet as its data center architecture. Lee said that this is a pain point we have seen over Ethernet. How can we build an Ethernet that supports thousands of servers and thousands of 40g cabinets? This is not easy because the vswitch is not large enough.

The largest Ethernet switch on the market supports over 500 10g ports. However, only 25% or less than 25% reaches the line rate. This still cannot meet Facebook's needs. Lee said that using the current technology, each of these switches considered themselves an island-No switch knows the existence of other switches. This is the problem. In this scale, if one of the links fails, you can find it. Good luck.

When hundreds of millions of users are "watching" your software or logging on to and using Facebook, this problem is even more serious. You must resolve the fault within a few minutes. Instrument is a key requirement. Lee said that if you have many paths, you cannot determine which path has a fault. SNMP (Simple Network Management Protocol) cannot help you. You do not have a counter for that link. This entire activity is very painful.

The same is true for purchasing a green Ethernet switch that meets the state's energy efficiency requirements, the University of California, San Francisco, is now facing this problem less than a month after California's IT department was announced to reduce its energy use by 30% within two years.

Jeffrey Fritz, Director of Corporate Network Services at the University of California, San Francisco, said green networks must be not limited to data centers. It includes the entire enterprise. It is located in the room with 700 connection lines throughout the UC San Francisco facility. The green color of IT devices must start from now on. This should have started five years ago.

Fritz said the connection line room at the University of California, San Francisco, was very hot. One day, when the temperature in San Francisco was 60 degrees Fahrenheit, the temperature in the room he entered was 90 degrees Fahrenheit. The wiring cabinets in this school are very crowded and the temperature is too high. This is not because the heating and ventilation of these rooms are different from those of the air-conditioning system.

Fritz told a house-room system and component supplier that if some products cannot meet the environment requirements, we will not buy your products because we are not allowed to buy them. This is not just a server issue. They have made great progress in energy efficiency over the past few years. But is it a network device problem?

Fritz says we have been using the same device for the past 10 years. We gave up the ball. If we build a green data center and forget to build a Green Network, what will we do? Where is the logic of this method?

The University of California, San Francisco, issued an invitation to advice on network devices, including awards to vendors who propose energy-saving suggestions. The school also received a discount from PG & E to demonstrate how to reduce energy consumption. Felicia Silva, Deputy Director of network operation services at the University of California, San Francisco, said.

However, when additional ports are required, the University of California, San Francisco, must upgrade the connection-line room with $90 thousand to $0.15 million to accommodate expanded power supplies and cooling devices. He said that when the temperature in the connection line room reaches 98 degrees Fahrenheit, I cannot continue to approve the purchase of network equipment. Give us some devices that can be purchased.

1. Correct Interpretation and test of vswitch Port
2. Summarize the market status of high-end Switches
3. Focuses on core layer switch faults
4. PythonAndroid
5. Let's talk about the stacking of Ethernet switches.