Complete the tasks described in this chapter to physically install your Cisco DNA Center appliance. Complete these tasks for each appliance you want to install, and be sure to install all of the appliances before configuring the primary node.

After you have completed all of these tasks successfully, continue with the steps described in Prepare for Appliance Configuration.

Note	Before you install, operate, or service a server, review the Regulatory Compliance and Safety Information for Cisco UCS C-Series Servers for important safety information.

Warning

IMPORTANT SAFETY INSTRUCTIONS This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071

Warning

To prevent the system from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of: 95°F (35°C). Statement 1047

Warning

The plug-socket combination must be accessible at all times, because it serves as the main disconnecting device. Statement 1019

Warning

This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 250 V, 15 A. Statement 1005

Warning

Installation of the equipment must comply with local and national electrical codes. Statement 1074

Warning

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock, and key, or other means of security. Statement 1017

The following four warnings are specific to the 112-core appliance:

Warning

This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024

Warning

For Nordic countries (Norway, Finland, Sweden and Denmark) this system must be installed in a Restricted Access Location, where the voltage of the main ground connection of all equipment is the same (equipotential earth) and the system is connected to a grounded electrical outlet. Statement 328

Warning

High leakage current – earth connection essential before connection to system power supply. Statement 342

Warning

This equipment must be externally grounded using a customer-supplied ground wire before power is applied. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 366

Caution

To ensure proper airflow, it is necessary to rack the appliances using rail kits. Physically placing the units on top of one another or stacking without the rail kits blocks the air vents on top of the appliances, which could result in overheating, higher fan speeds, and higher power consumption. We recommend that you mount your appliances on rail kits when you are installing them into the rack because these rails provide the minimal spacing required between the appliances. No additional spacing between the appliances is required when you mount the units using rail kits.

Caution

Avoid UPS models that use ferroresonant technology. These UPS models can become unstable with systems such as the Cisco UCS, which can have substantial current-draw fluctuations because of fluctuating data traffic patterns.

When you install an appliance, follow these guidelines:

• Plan your site configuration and prepare the site before installing the appliance. See the Cisco UCS Site Preparation Guide for help with the recommended site planning and preparation tasks.

• Ensure that there is adequate space around the appliance to enable servicing, and for adequate airflow. The airflow in this appliance is from front to back.

• Ensure that the site's air-conditioning meets the thermal requirements listed in Environmental Specifications.

• Ensure that the cabinet or rack meets the requirements listed in Review the Rack Requirements.

• Ensure that the site's power meets the requirements listed in Power Specifications. If available, use a UPS to protect against power failures.

For proper operation, the rack in which you install the appliance must meet the following requirements:

• A standard 19-in. (48.3-cm) wide, four-post EIA rack, with mounting posts that conform to English universal hole spacing, per section 1 of ANSI/EIA-310-D-1992.

• The rack post holes can be square 0.38-in. (9.6 mm), round 0.28-in. (7.1 mm), #12-24 UNC, or #10-32 UNC when you use the supplied slide rails.

• The minimum vertical rack space per server must be:

  • For the 44 and 56-core appliance, one RU, which equals 1.75 in. (44.45 mm).

  • For the 112-core appliance, four RUs, which equals 7.0 in. (177.8 mm).