2 Site Requirements for Recovery Appliance and Oracle Exadata Storage Expansion Rack

This chapter describes the site requirements for Recovery Appliance, sometimes referenced as "ZDLRA Rack".

Ensuring That the Site is Ready

Before ZDLRA Rack is delivered to the site, the following tasks must be performed to ensure the site is ready:

Task 1   Review Site Requirements

Review the site requirements in this chapter to understand the requirements for ZDLRA Rack.

Task 2   Understand the Networking Requirements and Options

Review Preparing Your Networks for Recovery Appliance to discern the networking requirements and configuration decisions that you must make.

Task 3   Run Oracle Exadata Deployment Assistant (OEDA)

Run OEDA to create the necessary configuration files.

See unresolvable-reference.html.

Task 4   Configure the Network

Configure the network using the files from OEDA. This includes registering the networks in the Domain Name System (DNS), assigning IP addresses, and configuring data center switches and firewalls.

Task 5   Prepare the Site Based on Requirements

Prepare the site based on the requirements, such as, install the network cables and power supplies, prior to the arrival of ZDLRA Rack.

Review the procedures in Installing the Recovery Appliance at the Site

General Environmental Requirements

The following sections describe the general environmental requirements for ZDLRA Racks.

General Environmental Requirements for ZDLRA Rack X6 and Later

Starting with X6 models of Recovery Appliance and Oracle Exadata Storage Expansion Rack, use Oracle Exadata Configuration Assistant (OECA) to determine environmental requirements, such as size, weight, acoustic level, power, cooling, and airflow. This includes all X6, X7, X8, X8M, X9M, and later models.

Space Requirements

For all Recovery Appliance X7, X8, X8M, X9M, and later models, use Oracle Exadata Configuration Assistant (OECA) to determine the size of each rack.

In addition to the rack height, 914 mm (36 inches) of space is required above the rack height for maintenance access, as described in Table 2-3.

The space surrounding the cabinet must not restrict the movement of cool air between the air conditioner and the front of the systems within the cabinet, or the movement of hot air coming out of the rear of the cabinet.

Space Requirements for Racks up to Recovery Appliance X6

All racks up to Recovery Appliance X6-2 use the same hardware rack, and have the same space requirements.

The space requirements are as follows:

• Height: 1998 mm (78.66 inches)
• Width: 600 mm with side panels (23.62 inches)
• Depth: 1200 mm (47.24 inches)

The minimum ceiling height for the cabinet is 2912 mm (114.65 inches), measured from the true floor or raised floor, whichever is higher. This includes an additional 914 mm (36 inches) of space required above the rack height for maintenance access, as described in Table 2-3. The space surrounding the cabinet must not restrict the movement of cool air between the air conditioner and the front of the systems within the cabinet, or the movement of hot air coming out of the rear of the cabinet.

Receiving, Unpacking, and Access Route Requirements

Before your ZDLRA Rack arrives, ensure that the receiving area is large enough for the package.

Use the following package dimensions for ZDLRA Rack:

• Shipping height: 2159 mm (85 inches)
• Shipping width: 1219 mm (48 inches)
• Shipping depth: 1575 mm (62 inches)

If your loading dock meets the height and ramp requirements for a standard freight carrier truck, then you can use a pallet jack to unload the rack. If the loading dock does not meet the requirements, then you must provide a standard forklift or other means to unload the rack. You can also request that the rack be shipped in a truck with a lift gate.

When ZDLRA Rack arrives, leave the rack in its shipping packaging until it arrives at its installation site. Use a conditioned space to remove the packaging material to reduce particles before entering the data center. The entire access route to the installation site should be free of raised-pattern flooring that can cause vibration.

Allow enough space for unpacking it from its shipping cartons. Ensure that there is enough clearance and clear pathways for moving ZDLRA Rack from the unpacking location to the installation location.

Caution:

Prior to moving the rack, always make sure that all four leveling and stabilizing feet are raised and out of the way.

Table 2-1 Access Route Requirements

Access Route Item	With Shipping Pallet	Without Shipping Pallet
Minimum door height	2184 mm (86 inches)	2040 mm (80.32 inches)
Minimum door width	1270 (50 inches)	640 mm (25.19 inches)
Minimum elevator depth	1625.6 mm (64 inches)	1240 mm (48.82 inches)
Maximum incline	6 degrees	6 degrees
Minimum elevator, pallet jack, and floor loading capacity	1134 kg (2500 lbs)	1134 kg (2500 lbs)

Rack Weights for Recovery Appliance

Review the weight of your ZDLRA Rack to ensure that it can be delivered and located safely.

For all Recovery Appliance X6, X7, X8, X8M, X9M, and later models, use Oracle Exadata Configuration Assistant (OECA) to determine the net rack weight. In addition to the net rack weight, allow approximately 180 kg (400 lbs) for packaging materials.

For earlier models, use the following table to determine the rack weight:

Table 2-2 Shipping Weight

Recovery Appliance	Full Rack	Minimum Configuration
X7 Weight	899.9 kg (1983.9 lbs)	385.7 kg (850.4 lbs)
X6 and X5 Weight	875.7 kg (1930.5 lbs)	381.2 kg (840.5 lbs)
X4 Weight	866 kg (1909 lb)	469 kg (1034 lb)

Maintenance Access Requirements

The maintenance area must be large enough for ZDLRA Rack, and have the required access space.

The required space to remove the side panels is 675.64 mm (26.6 inches). Side panel access is not required for normal maintenance.

Front access space requirement is typically the length of the longest chassis supported in the rack, plus the distance the rails need to travel out to install and remove equipment from the front.

Rear access space requirement is the space needed for a person working behind the ZDLRA Rack.

Top access space requirement is for a person standing on a ladder to be able service components installed in the top of the rack.

Table 2-3 Maintenance Access Requirements for ZDLRA Rack (All Models)

Location	Maintenance Access Requirement
Rear maintenance	914 mm (36 inches)
Front maintenance	1232 (48.5 inches)
Top maintenance	914 mm (36 inches)

Note:

• In raised floor data centers, an adjacent tile at the rear of the rack must be able to be opened to access any cabling going under the floor.
• ZDLRA Racks can be placed side-by-side when interconnecting the racks.

Flooring Requirements

ZDLRA Rack may be installed on raised floor or solid floor environments.

The site floor or the raised flooring must be able to support the total weight of ZDLRA Rack.

Table 2-4 Floor Load Requirements for ZDLRA Rack

Description	Requirement
Maximum allowable weight of installed rack equipment	952.5 kg (2100 lbs)
Maximum allowable weight of installed power distribution units	52.16 kg (115 lbs)
Maximum dynamic load (maximum allowable weight of installed equipment including PDUs)	1004.66 kg (2215 lbs)

Note:

For raised floors, a floor tile with a cutout at the rear of the Exadata rack is needed for routing power and network cables into the rack from under the raised floor. The cutout is located between the two rear leveling feet. See Figure 6-3 and Figure 6-5.

Electrical Power Requirements

The ZDLRA Rack can operate effectively over a wide range of voltages and frequencies. However, each rack must have a reliable power source.

Damage may occur if the ranges are exceeded. Electrical disturbances such as the following may damage ZDLRA Rack:

• Fluctuations caused by brownouts
• Wide and rapid variations in input voltage levels or in input power frequency
• Electrical storms
• Faults in the distribution system, such as defective wiring

To protect ZDLRA Rack from such disturbances, you should have a dedicated power distribution system, power-conditioning equipment, as well as lightning arresters or power cables to protect from electrical storms.

PDU Power Requirements

Each rack has two pre-installed power distribution units (PDUs). The PDUs accept different power sources. You must specify the type of PDU that is correct for your ZDLRA Rack and data center.

The following are the PDUs that Oracle Zero Data Loss Recovery Appliance currently supports or has supported in the past:

Low-voltage 15 kVA Single Phase PDUs for North America, South America, Japan and Taiwan

Table 2-5 Specifications for Low-voltage 15 kVA Single Phase PDUs for North America, South America, Japan and Taiwan

Specification	Required values
Voltage	200-240 VAC
Frequency	50/60 Hz
Current	24 A maximum per input
Power rating	15 kVA
Output current	72 A (3 x 24 A)
Outlets	42 x C13; 6 x C19
Outlet groups	6
Group protection (UL489 2-pole circuit breaker)	20A

Materials Required

The following are needed to connect an Oracle Exadata rack to a low-voltage three-phase power source:

• 6 power cords for two PDUs, each rated for 30 amperes at 200-240 VAC
• 6 receptacles for 2 PDUs, each must be 15kVA, with three 30A/250V 2-pole/3-wire NEMA L6-30P plugs

Figure 2-1 Low-voltage Single Phase Power Connector for North America, South America, Japan and Taiwan

Description of "Figure 2-1 Low-voltage Single Phase Power Connector for North America, South America, Japan and Taiwan"

Low-voltage 15 kVA Three Phase PDUs for North America, South America, Japan and Taiwan

Table 2-6 Specifications for Low-voltage 15 kVA Three Phase PDUs for North America, South America, Japan and Taiwan

Specification	Required values, per PDU
Voltage	190-220 VAC
Frequency	50/60 Hz
Current	40 A maximum per phase
Power rating	14.4 kVA
Output current	69.3 A (3 x 23.1A)
Outlets	42 x C13; 6 x C19
Outlet groups	6
Group protection (UL489 2-pole circuit breaker)	20A
Data center receptacle	IEC309-3P4W-IP67 60A 250VAC 3ph (Hubbell equivalent is HBL460R9W)

Materials Required

The following are needed to connect an Oracle Exadata system to a low-voltage three-phase power source:

• 2 power cords for two PDUs, 60 amperes at 190-220 VAC three-phase
• 2 receptacles to connect the PDUs to 2 IEC 60309 60A 4-pin 250VAC 3ph IP67 data center receptacles

Figure 2-2 Low-voltage Three Phase Power Connector for North America, South America, Japan and Taiwan

Description of "Figure 2-2 Low-voltage Three Phase Power Connector for North America, South America, Japan and Taiwan"

High-voltage 15 kVA Single Phase PDUs for Europe, the Middle East and Africa (EMEA), and Asia Pacific (APAC), except for Japan and Taiwan

Table 2-7 Specifications for High-voltage 15 kVA Single Phase PDUs for Europe, the Middle East and Africa (EMEA), and Asia Pacific (APAC), except for Japan and Taiwan

Specification	Required values, per PDU
Voltage	220-240 VAC
Frequency	50/60 Hz
Current	24 A maximum per input
Power rating	15 kVA
Output current	72 A (3 x 24 A)
Outlets	42 x C13; 6 x C19
Outlet groups	6
Group protection (UL489 2-pole circuit breaker)	20A
Data center receptacle	15kVA, IEC309-2P3W-IP44 32A 250VAC (Hubbell equivalent is HBL332R6W

Note:

The high-voltage 15kVA single phase PDU is no longer available. The high-voltage 22kVA is a compatible replacement with the same receptacle and breaker requirements

Figure 2-3 High-voltage Single Phase Power Connector

Description of "Figure 2-3 High-voltage Single Phase Power Connector"

High-voltage 15 kVA Three Phase for Europe, the Middle East and Africa (EMEA), and Asia Pacific (APAC), except for Japan and Taiwan

Table 2-8 Specifications for High-voltage 15 kVA Three Phase for Europe, the Middle East and Africa (EMEA), and Asia Pacific (APAC), except for Japan and Taiwan

Specification	Required values, per PDU
Voltage	220/380-240/415 VAC 3-phase
Frequency	50/60 Hz
Current	25 A maximum per phase
Power rating	14.4 kVA
Output current	62.7 A (3 x 20.9 A)
Outlets	42 x C13; 6 x C19
Outlet groups	6
Group protection (UL489 1-pole circuit breaker)	20A
Data center receptacle	15kVA, three phase, 5-pin, IEC 60309 32A, 5-pin 230/400V, three phase IP44

Materials Required

The following are needed to connect an Oracle Exadata system to a high-voltage three-phase power source:

• 2 power cords for two PDUs, 25 amperes at 220/380-240/415 VAC three-phase
• 2 receptacles to connect the PDUs to 2 IEC 60309 32A 5-pin 230/400VAC 3ph IP44 data center receptacles

Figure 2-4 High-voltage Three Phase Power Connector

Description of "Figure 2-4 High-voltage Three Phase Power Connector"

Low-voltage 22 kVA Single Phase PDUs for North America, South America, Japan and Taiwan

Table 2-9 Specifications for Low-voltage 22 kVA Single Phase PDUs for North America, South America, Japan and Taiwan

Specifications	Required values, per PDU
Voltage	200-240 VAC
Frequency	50/60 Hz
Current	36.8 A maximum per input / 110.4 A Maximum per PDU
Power rating	22 kVA
Output current	110.4A (3x 36.8)
Outlets	42 x C13; 6 x C19
Outlet groups	6
Group protection (UL489 2-pole circuit breaker)	20A
Data center receptacle	Hubbell CS8269 or CS8264

Materials Required

The following are needed to connect an Oracle Exadata system to a low-voltage single-phase power source:

• 3 power cords for two PDUs
• 6 receptacles to connect the PDUs

The following image shows the low-voltage, 22 kVA single phase PDU power connector for North America, South America, Japan and Taiwan. This power connector is different from the power connector for the low-voltage 15 kVA single phase PDU.

Figure 2-5 Low-voltage 22 kVA Single Phase Power Connector

Description of "Figure 2-5 Low-voltage 22 kVA Single Phase Power Connector"

High-voltage 22 kVA Single Phase PDUs for Europe, the Middle East and Africa (EMEA), and Asia Pacific (APAC), except for Japan and Taiwan

Table 2-10 Specifications for High-voltage 22 kVA Single Phase PDUs for Europe, the Middle East and Africa (EMEA), and Asia Pacific (APAC), except for Japan and Taiwan

Specifications	Required values, per PDU
Voltage	220-240 VAC
Frequency	50/60 Hz
Current	32 A maximum per input
Power rating	22 kVA
Output current	96 A (3 x 32 A)
Outlets	42 x C13; 6 x C19
Outlet groups	6
Group protection (UL489 1-pole circuit breaker)	20A
Data center receptacle	IEC309-2P3W-IP44 32A 250VAC (Hubbell equivalent is HBL332R6W)

Materials Required

Note:

The high-voltage 15kVA single phase PDU is no longer available. The high-voltage 22kVA is a compatible replacement with the same receptacle and breaker requirements

The following are needed to connect an Oracle Exadata system to a high-voltage one-phase power source:

• 6 power cords for two PDUs, each rated for 25 amperes at 220/380-240/415 VAC 1-phase voltage
• 6 receptacles to connect the PDUs

Figure 2-6 High-voltage Single Phase Power Connector

Description of "Figure 2-6 High-voltage Single Phase Power Connector"

Low-voltage 24 kVA Three Phase PDUs for North America, South America, Japan and Taiwan

Table 2-11 Specifications for Low-voltage 24 kVA Three Phase PDUs for North America, South America, Japan and Taiwan

Specifications	Required values, per PDU
Voltage	200-208 VAC 3-phase
Frequency	50/60 Hz
Current	34.6 A maximum per phase
Power rating	25 kVA
Output current	120 A (6 x 20 A)
Outlets	42 x C13; 6 x C19
Outlet groups	6
Group protection (UL489 2-pole circuit breaker)	20A
Data center receptacle	IEC309-3P4W-IP67 60A 250VAC 3ph (Hubbell equivalent is HBL460R9W)

Materials Required

The following are needed to connect an Oracle Exadata system to a low-voltage three-phase power source:

• 4 power cords for two PDUs
• 4 receptacles to connect the PDUs

High-voltage 24 kVA Three Phase PDUs for Europe, the Middle East and Africa (EMEA), and Asia Pacific (APAC), except for Japan and Taiwan

Table 2-12 Specifications for High-voltage 24 kVA Three Phase PDUs for Europe, the Middle East and Africa (EMEA), and Asia Pacific (APAC), except for Japan and Taiwan

Specifications	Required values, per PDU
Voltage	220/380-240/415 VAC 3-phase
Frequency	50/60 Hz
Current	18.1 A maximum per phase
Power rating	25 kVA
Output current	108.6A (6 x 18.1 A)
Outlets	42 x C13; 6 x C19
Outlet groups	6
Group protection (UL489 1-pole circuit breaker)	20A
Data center receptacle	IEC309-4P5W-IP44 32A 400VAC 3ph (Hubbell equivalent is HBL532R6W)

Materials Required

The following are needed to connect an Oracle Exadata system to a high-voltage three-phase power source:

• 4 power cords for two PDUs
• 4 receptacles to connect the PDUs

Facility Power Requirements

To prevent catastrophic failures, design the input power sources to ensure adequate power is provided to the PDUs.

Use dedicated AC breaker panels for all power circuits that supply power to the PDU. When planning for power distribution requirements, balance the power load between available AC supply branch circuits. In the United States of America and Canada, ensure that the overall system AC input current load does not exceed 80 percent of the branch circuit AC current rating.

Note:

Electrical work and installations must comply with applicable local, state, or national electrical codes. Contact your facilities manager or qualified electrician to determine what type of power is supplied to the building.

PDU power cords are 4 meters (13.12 feet) long, and 1 to 1.5 meters (3.3 to 4.9 feet) of the cord is routed within the rack cabinet. The installation site AC power receptacle must be within 2 meters (6.6 feet) of the rack.

Circuit Breaker Requirements

If computer equipment is subjected to repeated power interruptions and fluctuations, then it is susceptible to a higher rate of component failure.

You are responsible for supplying the circuit breakers. One circuit breaker is required for each power cord. In addition to circuit breakers, provide a stable power source, such as an uninterruptible power supply (UPS) to reduce the possibility of component failures.

Use dedicated AC breaker panels for all power circuits that supply power to the server. Servers require electrical circuits be grounded to the Earth.

Note:

Electrical work and installations must comply with applicable local, state, or national electrical codes.

Electrical Grounding Guidelines

The cabinets for ZDLRA Rack are shipped with grounding-type power cords.

• Always connect the cords to grounded power outlets.
• Check the grounding type, because different grounding methods are used depending on your location.
• Refer to documentation such as IEC documents for the correct grounding method.
• Ensure that the facility administrator or qualified electrical engineer verifies the grounding method for the building, and performs the grounding work.

Temperature and Humidity Requirements

Excessive internal temperatures may result in full or partial shut down of Recovery Appliance.

Airflow through ZDLRA Rack is from front to back. Refer to General Environmental Requirements for information on cooling and airflow.

Note:

Studies have shown that temperature increases of 10 degrees Celsius (15 degrees Fahrenheit) above 20 degrees Celsius (70 degrees Fahrenheit) reduce long-term electronics reliability by 50 percent.

The following table lists the temperature, humidity and altitude requirements for operating and non-operating machines.

Table 2-13 Temperature, Humidity and Altitude Requirements

Condition	Operating Requirement	Non-operating Requirement	Optimum
Temperature	5 to 32 degrees Celsius (41 to 89.6 degrees Fahrenheit)	-40 to 70 degrees Celsius (-40 to 158 degrees Fahrenheit).	For optimal rack cooling, data center temperatures from 21 to 23 degrees Celsius (70 to 74 degrees Fahrenheit)
Relative humidity	10 to 90 percent relative humidity, non-condensing	Up to 93 percent relative humidity.	For optimal data center rack cooling, 45 to 50 percent, non-condensing
Altitude	3048 meters (10000 feet) maximum	12000 meters (40000 feet).	Ambient temperature is reduced by 1 degree Celsius per 300 m above 900 m altitude above sea level

Set conditions to the optimal temperature and humidity ranges to minimize the chance of downtime due to component failure. Operating ZDLRA Rack for extended periods at or near the operating range limits, or installing it in an environment where it remains at or near non-operating range limits could significantly increase hardware component failure.

The ambient temperature range of 21 to 23 degrees Celsius (70 to 74 degrees Fahrenheit) is optimal for server reliability and operator comfort. Most computer equipment can operate in a wide temperature range, but near 22 degrees Celsius (72 degrees Fahrenheit) is desirable because it is easier to maintain safe humidity levels. Operating in this temperature range provides a safety buffer in the event that the air conditioning system goes down for a period of time.

The ambient relative humidity range of 45 to 50 percent is suitable for safe data processing operations. Most computer equipment can operate in a wide range (20 to 80 percent), but the range of 45 to 50 percent is recommended for the following reasons:

• Optimal range helps protect computer systems from corrosion problems associated with high humidity levels.
• Optimal range provides the greatest operating time buffer in the event of air conditioner control failure.
• This range helps avoid failures or temporary malfunctions caused by intermittent interference from static discharges that may occur when relative humidity is too low.

Electrostatic discharge (ESD) is easily generated, and hard to dissipate in areas of low relative humidity, such as below 35 percent. ESD becomes critical when humidity drops below 30 percent. It is not difficult to maintain humidity in a data center because of the high-efficiency vapor barrier and low rate of air changes normally present.

Ventilation and Cooling Requirements

Always provide adequate space in front and behind the rack to allow for proper ventilation.

Do not obstruct the front or rear of the rack with equipment or objects that might prevent air from flowing through the rack. Rack-mountable servers and equipment typically draw cool air in through the front of the rack and let out warm air out the rear of the rack. There is no air flow requirement for the left and right sides due to front-to-back cooling.

If the rack is not completely filled with components, then cover the empty sections with filler panels. Gaps between components can adversely affect air flow and cooling within the rack.

Relative humidity is the percentage of the total water vapor that can exist in the air without condensing, and is inversely proportional to air temperature. Humidity goes down when the temperature rises, and goes up when the temperature drops. For example, air with a relative humidity of 45 percent at a temperature of 24 degrees Celsius (75 degrees Fahrenheit) has a relative humidity of 65 percent at a temperature of 18 degrees Celsius (64 degrees Fahrenheit). As the temperature drops, the relative humidity rises to more than 65 percent, and water droplets are formed.

Air conditioning facilities usually do not precisely monitor or control temperature and humidity throughout an entire computer room. Generally, monitoring is done at individual points corresponding to multiple exhaust vents in the main unit, and other units in the room. Special consideration should be paid to humidity when using underfloor ventilation. When underfloor ventilation is used, monitoring is done at each point close to an exhaust vent. Distribution of the temperature and humidity across the entire room is uneven.

Oracle Exadata Racks have been designed to function while mounted in a natural convection air flow. The following requirements must be followed to meet the environmental specification:

• Ensure there is adequate air flow through the server.

• Ensure the server has front-to-back cooling. The air inlet is at the front of the server, and the air is let out the rear.

• Allow a minimum clearance of 1219.2 mm (48 inches) at the front of the server, and 914 mm (36 inches) at the rear of the server for ventilation.

Use perforated tiles, approximately 400 CFM/tile, in front of the rack for cold air intake. The tiles can be arranged in any order in front of the rack, as long as cold air from the tiles can flow into the rack. Inadequate cold air flow could result in a higher inlet temperature in the servers due to exhaust air recirculation. The following table describes the recommended number of floor tiles:

Type of Oracle Exadata Database Machine or Oracle Exadata Storage Expansion Rack	Recommended Number of Floor Tiles
Oracle Exadata full rack systems	4
Oracle Exadata half rack systems	3
Oracle Exadata quarter and eighth rack systems	1

Figure 2-7 shows a typical installation of the floor tiles for a full rack.

Figure 2-7 Typical Data Center Configuration for Perforated Floor Tiles

Description of "Figure 2-7 Typical Data Center Configuration for Perforated Floor Tiles"

Network Connection and IP Address Requirements for ZDLRA Rack

This section describes the requirements to connect the Oracle Zero Data Loss Recovery Appliance to your existing network infrastructure.

Network Connection Requirements for ZDLRA Rack

Prior to installation, network cables must be run from your existing network infrastructure to the installation site. The requirements to connect Recovery Appliance to your existing network infrastructure are as follows:

Network	Connection Requirements
Administration Network	Mandatory: 1 uplink for the Management Network Switch. Recommended: 2 uplinks for remote monitoring of the power distribution units (PDUs). Optional: 1 uplink for ILOM on each database server or storage server if using a separate ILOM network.
Client Network	For bonded network configurations: 2 uplinks for each database server. For non-bonded network configurations: 1 uplink for each database server. Note: Non-bonded network configurations are not supported on Recovery Appliance X7 and later systems.
Additional Network(s)	For bonded network configurations: 2 uplinks for each database server and additional network. For non-bonded network configurations: 1 uplink for each database server and additional network. Note: Non-bonded network configurations are not supported on Recovery Appliance X7 and later systems.
RDMA Network Fabric (Private Network)	No uplinks are required. The RDMA Network Fabric is completely self-contained within Recovery Appliance.

DNS Configuration for ZDLRA Rack

Prior to receiving your ZDLRA Rack, you must use Oracle Exadata Deployment Assistant (OEDA) to generate files that drive the configuration of the system. The system configuration files contain network host names and IP addresses for the management network, client network, and additional public networks, which should be registered in Domain Name System (DNS) prior to initial configuration. In particular, all public addresses, single client access name (SCAN) addresses, and VIP addresses should be registered in DNS prior to installation.

The assistant-generated file defines the SCAN as a single name with three IP addresses on the client access network. The three SCAN addresses provide service access for clients to Oracle Zero Data Loss Recovery Appliance. Configure DNS for round robin resolution for the SCAN name to these three SCAN addresses.

All addresses registered in DNS must be configured for both forward resolution and reverse resolution. Reverse resolution must be forward confirmed (forward-confirmed reverse DNS) such that both the forward and reverse DNS entries match each other.

IP Address Requirements for ZDLRA Rack

The Recovery Appliance requires a dedicated allocation of host names and IP addresses. The number of required IP addresses primarily depends on the size of the system.

The detailed network configuration, including host names and IP addresses, is generated from information supplied to Oracle Exadata Deployment Assistant (OEDA).

You should configure the IP addresses in your existing networks after you run OEDA. All IP addresses in the configuration file must be unassigned at the time of initial configuration. In addition, all IP addresses must be statically-assigned IP addresses, not dynamically-assigned (DHCP) addresses.

All RDMA Network Fabric IP addresses must be in the same subnet, with a minimum subnet mask of 255.255.240.0 (or /20). The subnet mask chosen should be wide enough to accommodate possible future expansion of the Recovery Appliance and the internal network.

You can use the information in the following sections to calculate the IP address requirement for Recovery Appliance. However, ensure that you use the configuration information generated in OEDA as your authoritative guide.

Rack-Level IP Address Requirements

The following table outlines the rack-level IP address requirements for Recovery Appliance. These addresses are required regardless of the configuration options that are selected for the system.

Network	IP Address Requirements
Administration Network	1 IP address for the administration network interface on each compute server or storage server. 1 IP address for the ILOM network interface on each database server or storage server. 1 IP address for the management interface on each RDMA Network Fabric switch. 1 IP address for the management interface on the Management Network Switch switch. 1 IP address for the management interface in each power distribution unit (PDU).
RDMA Network Fabric (Private Network)	2 IP addresses for each database server or storage server.