Designing Cisco Network Service Architectures - Free Books

CP Hotels Design TasksComplete these steps:Step 1 (E-Commerce WAN Statement of Work) CP Hotels’ website is experiencing 50%growth in traffic back to the Data Centers every year. The current links are at 80%utilization, so that if one fails, the other will not have enough capacity. Assuming allthe old and new WAN technologies are available, recommend an updatedE-Commerce WAN design.Be sure to address the following:— Are there any WAN technologies that should clearly be ruled out? If so, why?— Are there any WAN technologies that are particularly suitable for this use?— Is there an approach that would provide the ability to “turn up the bandwidth”without new hardware or access circuits?— How much bandwidth do you recommend that CP Hotels start out with on thereplacement WAN links?— What SLA characteristics are needed for these links, if CP Hotels views them as partof the highly critical revenue-producing e-commerce site?Step 2 (Server Farm Statement of Work) CP Hotels is asking you, as their favorite andhighly-skilled consultant, to comment on the data center Server Farm Moduledesign.— Management has asked for a “green field” re-design of the Server Farm modulefrom scratch. As you know from some late nights, there have been several“configuration accidents” and the odd hardware problem leading to large SpanningTree loops. Management would like to “add another 9 of availability” for the serverfarm network.— The CIO emphasized that the new design should take advantage of technology andspeed improvements, while complying with shifts in what are considered BestPractices.— The CP Hotels server administrators discovered VMWare about 2 years ago, andstarted rolling it into large-scale production use about 9 months ago. As you know,VMWare allows one physical server to be divided into multiple logical servers,providing isolation for different applications with a heavy hardware investment for“one application, one server”. They have been testing VMotion, which can“snapshot” a virtual server and move it to another physical server in about 1 second,without having to take it out of service. Their VMotion consultant is telling them thebest way to deploy VMotion is to use one or two dedicated interface(s) per server,on a dedicated VLAN, to ensure rapid problem-free moves without contention fromdata traffic. Many rows of racks are full, however, so any “unused” servers forVMotion could be anywhere in the data center. Space at row ends is tight, so CPHotels cannot just add some spare racks and servers to the existing rows.— CP Hotels wants your recommendation on how to accommodate the VMotionrequirements while meeting the first goal of “adding another 9 of availability”.Page 24 WHAT IS MY NAME? (ARCH) v2.0 © 2007 Cisco Systems, Inc.