100GE以太网技术介绍
Each new 10 Gbps bandwidth step comes with additional switch and/or computer interfaces – both of which are expensive affairs.
http://www.77cn.com.cnes.–.Different.SpeedsData center network usage is driven by Moore’s law – doubling every 24 months. While 10 Gbps appears to be sufficient for most data centers today, 40 Gbps is expected to meet data center needs through 2014.Aggregated Internet traffic, however, is related to general Internet and telecom growth – doubling every 12 to18 months. A higher bandwidth solution is required. According to the Ethernet Alliance3:“The increasing trend of Ethernet being an end-to-end network solution and the under-standing that a 40 Gbps interface will not be sufficient to address the aggregation demand has resulted in the 100 Gbps rate being identified as the next high-speed net-work operator interface. The core network needs to evolve to a higher rate, and opera-tors are looking to Ethernet as the new ‘fat pipe’ for the core of their backbone; position-ing 100 Gbps to complete the transition to an end-to-end all-Ethernet infrastructure.”Based on the current rate of backbone bandwidth expansion, 100 Gbps should meet the needs of carriers and ISPs through 2015.The.Costly.AlternativeLacking alternatives to 10 Gbps connections, carriers and enterprises have resorted to using multiple 10 Gbps connections to satisfy their aggregated bandwidth requirements. Each new 10 Gbps bandwidth step comes with additional switch and/or computer interfaces – both of which are expensive affairs. The complexity of such shear numbers can also be daunting, as shown in the metro network depicted in Figure 3. The benefits from a 100 Gbps network infrastructure are immediately visible.Figure 3. Network Complexity and Benefits of 100 Gbps Infrastructure3 Gigabit Ethernet,” Version 1.0, August 2007. Mark Nowell, Vijay Vusirikala, Robert Hays, “Overview of Requirements and Applications for 40 Gigabit and 100