Data Center LAN Migration Guide - Juniper Networks

Data Center LAN Migration Guide
IOS Input Page
The main interface for I2J supports upload or cut and paste of IOS configuration files. You can adjust a variety of
translation options, such as outputting verbose IOS comments or consolidating firewall terms. Then use the Translate
button to convert the IOS file into Junos OS. The output is displayed with statistics, the Junos OS configuration output,
and the IOS source with messages.
Figure 11: The I2J input page for converting IOS to Junos OS
Data Center Migration Insertion Points: Best Practices and Installation Tasks
The legacy three-tier design found in many of today’s data centers was depicted in Figure 1. This is the baseline for
layer insertion points addressed in this document. For a specific insertion point such as the access layer, for example,
the recommended Juniper best practices pertaining to that layer are provided first. This is then followed by the
recommended preinstallation, installation, and post installation tasks.
Recommended best practices and installation-related tasks focus primarily on currently shipping products and
capabilities.
A dedicated Troubleshooting chapter detailing Juniper recommended guidelines for the most commonly encountered
migration and installation issues is also included in this guide.
New Application/Technology Refresh/Server Virtualization Trigger Events
These events are often driven by a lack of capacity in the existing infrastructure to support a new application or service.
They may also occur when an organization is trying to maximize its processor capacity through use of virtual servers.
Redesigns based on these triggers can involve upgrades to either data center access or aggregation tiers (or both) as
described later in this section. They may also involve a redesign across data centers, addressed later in the Business
Continuity and Workload Mobility Trigger Events section. In general, server virtualization poses an interesting set of
design challenges, detailed at the end of this section.
The insertion point for each of these triggers often involves provisioning one or more new Points of Delivery (PODs) or
designated sections of a data center layout, including new switches for the network’s access layer. The new POD(s)
may also include an upgrade of the related aggregation layer which, depending on the requirements, could potentially
later serve as the core in a simplified two-tier design. The process may also involve a core switch/router upgrade or
replacement to increase functionality and bandwidth for each new POD requirement.
For 10GbE server connectivity in a top of rack deployment, Juniper’s recommended design would be based on either the
QFX3500 or EX4500. The choice would be based on several factors.
• The QFX3500 would be the preferred platform where sub microsecond latency is required such as a high
performance compute cluster and financial services transactions.
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