A Cisco Nexus 5000 switch port is more than $400 (based on Cisco Nexus 5000 Unified Fabric TCO calculator) so replacing an equipment port is significant, especially since individual ports cannot be replaced. #Basic data center design PatchReplacing a patch or equipment cord is inexpensive. These managers do not compensate for the stress that can be introduced at the network port by poor routing practices. Because these managers are designed to attach directly to the active piece of equipment, they can cause a sharp-bend in the cord, resulting in damage to the cord and stress on the equipment port. Some equipment manufacturers include equipment cord managers with their equipment. Figure 1 shows an example of maintaining the bend radius while protecting the cable. Excessive bends in copper and fiber cable or equipment cords can cause stress on a port resulting in a damaged equipment port. Excessive bending or pulling of optical fiber cable can result in additional link loss and damage to the fibers which could cause the fibers to fail eventually. A 3dB (decibel) loss equates to approximately 50% of the signal power being lost. Tight bends and excessive pulling on copper cables can create crosstalk and return loss. Look for features in the cable management that have been designed for both copper and fiber maintain proper bend radius for both copper and fiber, and protect the cable from damage. Vertical managers should be large so they provide room to grow, make moves, adds and changes easier and reduce cable obstruction for better airflow. The infrastructure must have a well-designed cable management solution that is more than just a path for the cable. The last component of the infrastructure is cable management. This will minimize the mixing of hot and cold air to help maximize the efficiencies of the cooling solution. The rack or cabinet should have options that help manage airflow like baffles that can be easily added for equipment with side-to-side airflow, blanking filler panels to fill open rack units and brush grommets (or something similar) at the cable entrance and exit points. The mixing of cold and hot air will decrease the efficiency of the cooling solution. Look for features like adjustable side rails and higher weight thresholds.Īirflow may also change since some equipment breaths side-to-side instead of front-to-back – rising temperatures will negatively affect network performance. Right-sizing the rack or cabinet initially is not difficult, but the rack or cabinet must be able to adjust to accommodate new equipment with different size and weight requirements. In fact, 90% of active equipment will be replaced in five years or less (Source: BSRIA, 2011). This is especially critical with fiber systems since the loss budgets for 40 and 100 Gigabit Ethernet can easily be exceeded, even if components meet the maximum insertion loss specified by the TIA standards.Īctive equipment will change at least once, usually several times, during the life of the physical infrastructure. To maximize channel performance with the most headroom, the connectivity and cable components should be co-engineered. Also, design decisions in the cable can negatively impact the performance of the connector and vice-versa. This is because the TIA component performance is specified as a range, not a single value, so the channel performance becomes an average. Maximizing the structured cabling channel performance takes more than just selecting the best performing connectivity and cable in the market. To maximize network performance three parts of the infrastructure must be considered: the structured cabling, racks and cabinets, and the cable management. This was a 41 percent increase from $5,600 in 2010. In a study of 67 data centers with a minimum size of 2,500 square feet, done by the Ponemon Institute in 2013 (sponsored by Emerson Network Power), the average cost of data center downtime across industries was approximately $7,900 per minute. Ethernet networks can experience several different problems including slow response time, application sluggishness, and even a loss of link connection. Infrastructure can have a direct impact on network performance. When companies began adopting high density configurations, virtualization and other methods to boost the capacity of existing IT equipment, they disregarded the need for a robust data center infrastructure to ensure uninterrupted business-critical applications.
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