Data Center LAN Migration Guide - Juniper Networks
Data Center LAN Migration Guide - Juniper Networks
Data Center LAN Migration Guide - Juniper Networks
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<strong>Data</strong> <strong>Center</strong> <strong>LAN</strong> <strong>Migration</strong> <strong>Guide</strong><br />
Two-Tier Design Facilitates Cloud Computing<br />
By simplifying the design, by sharing resources, and by allowing for integrated security, a two-tier design also enables<br />
the enterprise to take advantage of the benefits of cloud computing. Cloud computing delivers on-demand services to<br />
any point on the network without requiring the acquisition or provisioning of location-specific hardware and software.<br />
These cloud services are delivered via a centrally managed and consolidated infrastructure that has been virtualized.<br />
Standard data center elements such as servers, appliances, storage, and other networking devices can be arranged in<br />
resource pools that are shared securely across multiple applications, users, departments, or any other way they should<br />
be logically shared. The resources are dynamically allocated to accommodate the changing capacity requirements of<br />
different applications and improve asset utilization levels. This type of on-demand service and infrastructure simplifies<br />
management, reduces operating and ownership costs, and allows services to be provisioned with unprecedented<br />
speed. Reduced application and service delivery times mean that the enterprise is able to capitalize on opportunities<br />
as they occur.<br />
Achieving Power Savings and Operating Efficiencies<br />
Fewer devices require less power, which in turn reduces cooling requirements, thus adding up to substantial<br />
power savings. For example, a simplified design can offer more than a 39% power savings over a three-tier legacy<br />
architecture. Ideally, a common operating system should be used on all data center <strong>LAN</strong> devices to reduce errors,<br />
decrease training costs, ensure consistent features, and thus lower the cost of operating the network.<br />
Consolidating <strong>Data</strong> <strong>Center</strong>s<br />
Due to expanding services, enterprises often have more than one data center. Virtualization technologies like server<br />
migration and application load balancing require multiple data centers to be virtually consolidated into a single, logical<br />
data center. Locations need to be transparently interconnected with <strong>LAN</strong> interconnect technologies such as virtual<br />
private <strong>LAN</strong> service (VPLS) to interoperate and appear as one.<br />
All this is possible with a new, simplified data center <strong>LAN</strong> design from <strong>Juniper</strong> <strong>Networks</strong>. However, as stated earlier,<br />
<strong>Juniper</strong> recognizes that it is impractical to flash migrate from an existing, operational, three-tier production data center<br />
<strong>LAN</strong> design to a simpler two-tier design, regardless of the substantial benefits. However, migration can begin as a result<br />
of any of the following trigger events:<br />
• Addition of a new application or service<br />
• Refresh cycle<br />
• Server virtualization migration<br />
• <strong>Data</strong> center consolidation<br />
• Business continuity and workload mobility initiatives<br />
• <strong>Data</strong> center core network upgrade<br />
• Higher performance and scalability for security services<br />
The design considerations and steps for initiating migration from any of these trigger events is covered in detail in<br />
Chapter 3: <strong>Data</strong> <strong>Center</strong> <strong>Migration</strong>—Trigger Events and Deployment Processes.<br />
12 Copyright © 2012, <strong>Juniper</strong> <strong>Networks</strong>, Inc.