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be seen (as shown in Figure 2), to 2015 years more than 50% of the network device port with 10G port, and about 25% of the port will be used 40g/100g. From the related forecasts mentioned above, we can see that the network evolution of cloud computing data Center is very clear 唽 direction. In order to reduce the delay of the network and improve the response speed of the data center network, the cloud Computing data Center will adopt the core + Access Layer Two-layer network architecture inst

overall channel between the fiber loss too much, the current data center room building in the San transmission channel is the vast majority of configuration Wanchaodo mode cable, such as Wanchaodo mode OM3 fiber support million trillion 300 meters under the distance to control attenuation under 2.6dB, if due to the overall planning of the cause of network wiring jump Too much to cause the overall channel excessive attenuation, because the planning un

provide more million-gigabit links. Three, 100G type of Ethernet In 802.3ba, the following types are defined for 100GE: 100gbase-cr10 100gbase-cr10 is the 100gb/s signal in the copper cable application of the specification, the 10x10g (based on 10GBASE-KR) of the parallel mode, transmission distance of 7m. It is mainly used in the interconnection between rack/cabinet or rack/cabinet. 100gbase-sr10 100GBASE-SR10 is a specification for 100GB/S signals to be applied on multimode fibers, and

. The DMD mode of the optical fiber must meet one of the six templates listed in the following table. Table 1: DMD templates for IEC 60793-2-10 ala.2 multimode fiber 50/125μm Template number Inner Mask (radius 5-18μm)[ps/m] Inner Mask (radius 0-23μm)[ps/m] 1 ≤0.23 ≤0.70 2 ≤0.24 ≤0.60 3 ≤0.25 ≤0.50 4 ≤0.26 ≤0.40 5 ≤0.27 ≤0.35 6 ≤0.33 ≤0.33 Stan