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C H A P T E R 3

Installing the Chassis

Preparing to Install the Switch

Installing a Rack or Cabinet

Unpacking and Inspecting the Switch

Installing the Chassis in a Four-Post Rack

Attaching the Bottom-Support Rails to the Rack

Attaching Front-Mount Brackets to the Chassis

Installing the Chassis in a Four-Post Rack

Grounding the Chassis

Powering Up the Switch

C H A P T E R 4

Connecting the Switch to the ACI Fabric

ACI Fabric Topology

Preparing to Connect to Other Devices

Connecting a Leaf Switch to an APIC

Connecting a Leaf Switch to a Spine Switch

Setting Up an Optional Console or Optional Out-Of-Band Management Interface

Maintaining Transceivers and Optical Cables

C H A P T E R 5

Replacing Modules

Replacing a Fan Module During Operations

Replacing a Power Supply Module

Removing an HVAC/HVDC Power Supply

Removing an AC Power Supply

Removing a DC Power Supply

Installing an HVAC/HVDC Power Supply

Installing an AC Power Supply

Installing a DC Power Supply

Wiring a 48 V DC Electrical Connector Block

A P P E N D I X A

Rack Specifications

Overview of Racks

General Requirements for Cabinets and Racks

Requirements Specific to Standard Open Racks

Cisco Nexus 9336PQ ACI-Mode Switch Hardware Installation Guide

Contents

Summary of Contents for N9K-C9336PQ

Page 1: ...re Installation Guide First Published August 13 2014 Last Modified February 01 2016 Americas Headquarters Cisco Systems Inc 170 West Tasman Drive San Jose CA 95134 1706 USA http www cisco com Tel 408 526 4000 800 553 NETS 6387 Fax 408 527 0883 ...

Page 2: ...encouraged to try to correct the interference by using one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Modifications to this product not ...

Page 3: ...Modules 3 Power Supply Modules 3 C H A P T E R 2 Preparing the Site 5 Temperature Requirements 5 Humidity Requirements 5 Altitude Requirements 6 Dust and Particulate Requirements 6 Minimizing Electromagnetic and Radio Frequency Interference 6 Shock and Vibration Requirements 7 Grounding Requirements 7 Planning for Power Requirements 7 Airflow Requirements 8 Rack and Cabinet Requirements 9 Clearanc...

Page 4: ...ng a Leaf Switch to a Spine Switch 30 Setting Up an Optional Console or Optional Out Of Band Management Interface 32 Maintaining Transceivers and Optical Cables 32 C H A P T E R 5 Replacing Modules 33 Replacing a Fan Module During Operations 33 Replacing a Power Supply Module 35 Removing an HVAC HVDC Power Supply 36 Removing an AC Power Supply 37 Removing a DC Power Supply 37 Installing an HVAC HV...

Page 5: ...bles 46 Transceiver and Cable Specifications 46 RJ 45 Connectors 47 Power Cord Specifications 47 A P P E N D I X C LEDs 51 Switch Chassis LEDs 51 Fan Module LEDs 52 Power Supply LEDs 52 A P P E N D I X D Accessory Kits 55 Accessory Kit Contents 55 A P P E N D I X E Site Preparation and Maintenance Records 57 Site Preparation Checklist 57 Contact and Site Information 59 Chassis and Module Informati...

Page 6: ...Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide vi Contents ...

Page 7: ...riptions use the following conventions Description Convention Bold text indicates the commands and keywords that you enter literally as shown bold Italic text indicates arguments for which the user supplies the values Italic Square brackets enclose an optional element keyword or argument x Square brackets enclosing keywords or arguments separated by a vertical bar indicate an optional choice x y B...

Page 8: ...ments for which you supply values are in italic screen font italic screen font Nonprinting characters such as passwords are in angle brackets Default responses to system prompts are in square brackets An exclamation point or a pound sign at the beginning of a line of code indicates a comment line Related Documentation The Application Centric Infrastructure documentation set includes the following ...

Page 9: ...ommand Reference NX OS Release 11 0 Cisco Verified Scalability Guide for Cisco ACI Cisco ACI MIB Quick Reference Cisco Nexus CLI to Cisco APIC Mapping Guide Application Centric Inftrastructure Fabric Hardware Installation Guide Cisco NX OS Release Notes for Cisco Nexus 9000 Series ACI Mode Switches Cisco Nexus 9000 Series ACI Mode Licensing Guide Cisco Nexus 93128TX ACI Mode Switch Hardware Instal...

Page 10: ...w cisco com c en us support switches application virtual switch tsd products support series home html Documentation Feedback To provide technical feedback on this document or to report an error or omission please send your comments to apic docfeedback cisco com We appreciate your feedback Obtaining Documentation and Submitting a Service Request For information on obtaining documentation using the ...

Page 11: ...Quad Small Form factor Pluggable QSFP ports Console and out of band management ports one each Power supplies two one required for operations and an optional one for redundancy Fan modules two The following figure shows the hardware features seen on the power supply side of the chassis Figure 1 Hardware Features on the Power Supply Side of the Chassis Fan modules 2 3 Grounding Pad 1 Cisco Nexus 933...

Page 12: ... of the chassis to the bottom support brackets 7 Out of band management port RJ 45 port 3 Console port RJ232 port 4 Ports The switch chassis includes the following types of ports 40 Gigabit QSFP interface ports 36 Console port 1 Out of band management port 1 USB flash memory ports 2 The interface ports support QSFP transceivers and are numbered from left to right You use these ports to connect the...

Page 13: ...eat and shut down All fan and power supply modules must use the same direction of airflow Note Power Supply Modules The switch has two power supply slots labeled PS1 on the left and PS2 on the right You can mix any of the following power supplies in those slots 1200 W HVAC HVDC power supplies with white coloring for dual directional airflow N9K PUV 1200W 1200 W port side exhaust AC power supply wi...

Page 14: ...a cold aisle and exhausting to a hot aisle If they take in air from the hot aisle the switch can overheat and shut down All power supply and fan modules must use the same direction of airflow Caution Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 4 Overview Power Supply Modules ...

Page 15: ...ements High humidity can cause moisture to enter the switch Moisture can cause corrosion of internal components and degradation of properties such as electrical resistance thermal conductivity physical strength and size The switch is rated to operate at 8 to 80 percent relative humidity with a humidity gradation of 10 percent per hour For nonoperating conditions the switch can withstand from 5 to ...

Page 16: ... devices such as radio and television TV receivers operating near the switch Radio frequencies that emanate from the switch can also interfere with cordless and low power telephones Conversely RFI from high power telephones can cause spurious characters to appear on the switch monitor RFI is defined as any EMI with a frequency above 10 kHz This type of interference can travel from the switch to ot...

Page 17: ... the memory or cause components to fail To protect against these types of problems ensure that there is an earth ground connection for the switch You can connect the grounding pad on the switch either directly to the earth ground connection or to a fully bonded and grounded rack You must provide the grounding cable to make this connection but you can connect the grounding wire to the switch using ...

Page 18: ...ommended wire gauge is 8 AWG and the minimum wire gauge is 10 AWG Note Airflow Requirements The switch is designed to be positioned with its ports in either the front or the rear of the rack depending on your cabling and maintenance requirements Depending on which side of the switch faces the cold aisle you must have fan and power supply modules that move the coolant air from the cold aisle to the...

Page 19: ...or rack with mounting rails that conform to English universal hole spacing per section 1 of the ANSI EIA 310 D 1992 standard The depth of a four post rack must be 24 to 32 inches 61 0 to 81 3 cm between the front and rear mounting brackets Required clearances between the chassis and the edges of its rack or the interior of its cabinet are as follows 4 5 inches 11 4 cm between the front of the chas...

Page 20: ...s Required for a Four Post Rack Installation Depth of the chassis 5 Chassis 1 Maximum extension of the bottom support rails 6 Vertical rack mount posts and rails 2 Depth of the front clearance area this equals the depth of the chassis 7 Chassis width 3 Width of the front clearance area this equals the width of the chassis with two rack mount brackets attached to it 4 Both the front and rear of the...

Page 21: ...ny 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 SAVE THESE INSTRUCTIONS Warning The switch can be installed in the following types of racks using a rack mount ki...

Page 22: ...rements listed in Rack Specifications on page 43 Jumper power cords are available for use in a cabinet Note Ensure that the chassis can be adequately grounded If the switch is not mounted in a grounded rack we recommend connecting both the system ground on the chassis and the power supply ground directly to an earth ground Ensure that the site power meets the power requirements listed in System Sp...

Page 23: ...surface Grounding cable 6 AWG recommended sized according to local and national installation requirements the required length depends on the proximity of the switch to proper grounding facilities Crimping tool large enough to accommodate the girth of the grounding lug Wire stripping tool Installing a Rack or Cabinet Before you install the switch you must install a standard four post 19 inch 48 3 c...

Page 24: ...st include a circuit breaker so that you can safely connect the power cables to the power supply If you are using the combined mode or n 1 redundancy mode you need only one power source If you are using the n n redundancy mode you need two power sources one power source for each power supply Note Unpacking and Inspecting the Switch The switch is thoroughly inspected before shipment If any damage o...

Page 25: ...g the Bottom Support Rails to the Rack The switch chassis that you are installing ships with two adjustable bottom support rails that you can attach to a four post rack to hold the chassis Each of these bottom support rails has two pieces one that slides into the other so that you can adjust them to fit racks with front and rear mounting posts that are spaced less than 36 inches 91 cm On each bott...

Page 26: ...rails so that the chassis stop is positioned by the cold aisle If the fan modules have burgundy port side intake modules you must position the bottom support rails so that the chassis stop is positioned by the hot aisle Step 2 Separate the two sliders that make up one bottom support rail and position the half with the chassis stop by the appropriate aisle for the fan and power supply modules Also ...

Page 27: ...llowing tools and equipment Manual Phillips head torque screwdriver Front mount brackets 2 and screws 4 found inside the switch accessory kit Step 1 Align the two holes in one side of one of two front mount brackets to two holes on the left or right side of the chassis see the following figure Be sure that the other side of the bracket is facing toward the front port end of the chassis Figure 4 Al...

Page 28: ...ng the Chassis To prevent personal injury or damage to the chassis never attempt to lift or tilt the chassis using the handles on modules such as power supplies fans or cards these types of handles are not designed to support the weight of the unit Warning Before You Begin Make sure that the four post rack is properly installed and secured to the concrete subfloor Make sure that the bottom support...

Page 29: ...he bottom to the top with the heaviest component at the bottom of the rack If the rack is provided with stabilizing devices install the stabilizers before mounting or servicing the unit in the rack Step 1 Slide the power supply end of the chassis onto the bottom support rails that are installed on the rack Be sure that the sides of the chassis by the power supplies clips into the chassis stops on ...

Page 30: ...Receiving hole on each side of the chassis for the chassis stops on the bottom support rails 3 Slide the power supply end of the chassis onto the bottom support rails so that the chassis locks onto the chassis stops at the end of the rails 1 Customer supplied rack mount screw M6 x 10 mm screw or other screw appropriate for the rack used to secure each side of the chassis to the rack 4 Chassis stop...

Page 31: ...ower source see Powering Up the Switch on page 23 DC power supplies are grounded when you connect the ground cable to the power source ground terminal while also connecting the positive and negative wires to their power source terminals see Powering Up the Switch on page 23 Statement 1024 Ground Conductor This equipment must be grounded Never defeat the ground conductor or operate the equipment in...

Page 32: ... to secure the grounding lug to the chassis 3 Chassis grounding pad 1 Grounding cable with 0 75 in 19 mm of insulation stripped from one end inserted into the grounding lug and crimped in place 2 Step 3 Secure the grounding lug to the chassis grounding pad with two M4 screws see Callouts 1 and 3 in the previous figure and tighten the screws to 11 to 15 in lb 1 24 to 1 69 N m of torque Step 4 Prepa...

Page 33: ...upply circuit so that wiring is not overloaded Warning Statement 1029 Blank Faceplates and Cover Panels Blank faceplates and cover panels serve three important functions they prevent exposure to hazardous voltages and currents inside the chassis they contain electromagnetic interference EMI that might disrupt other equipment and they direct the flow of cooling air through the chassis Do not operat...

Page 34: ...r as shown in the following figure with the orange plastic button on top Figure 7 Wiring a 930W 48VDC Power Supply Connector Block 48V DC cable 4 Wire retainer lever 1 Grounding cable 8 AWG recommended 5 Orange plastic button on top of the connector 2 48V Return DC cable 3 5 Use a small screwdriver to depress the spring loaded wire retainer lever on the lower spring cage wire connector Insert your...

Page 35: ...eaker located between the power source and the terminals where you will connect the power cable 2 Connect each of the three wires in the power cable to the three terminals for the power source and secure them with the terminal nuts Make sure that the positive wire is attached to the positive terminal the negative wire is attached to the negative terminal and the ground wire is attached to the grou...

Page 36: ...Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 26 Installing the Chassis Powering Up the Switch ...

Page 37: ... Band Management Interface page 32 Maintaining Transceivers and Optical Cables page 32 ACI Fabric Topology The ACI fabric topology includes the following major components Application Centric Infrastructure Controller APIC appliance cluster of APICs Leaf switches Cisco Nexus 93120TX 93128TX 9332PQ 9372PX 9372PX E 9372TX 9396PX and 9396TX switches Spine switches Cisco Nexus 9336PQ 9504 9508 and 9516...

Page 38: ...tch to leaf switchesspine switches and one or more APICs consider the following for each type of interface and gather all of the required equipment before making the connections Cabling type required for each interface type Distance limitations for each signal type Additional interface equipment required Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 28 Connecting the Switch to the...

Page 39: ...bles clean and dust free to maintain high signal accuracy and to prevent damage to the connectors Attenuation loss of light increases with contamination and should be kept below 0 35 dB Clean these parts before installing them to prevent dust from scratching the fiber optic cable ends Clean the connectors regularly the required frequency of cleaning depends upon the environment In addition clean c...

Page 40: ...downlink port on a leaf switch For a Cisco 10GBASE LR or SR transceiver and cable insert the transceiver into a downlink optical port on a leaf switch before connecting the cable to the transceiver For Cisco SFP Active Optical Cables insert the transceiver on the cable into a downlink optical port on a leaf switch For a 10GBASE T copper cable insert the RJ 45 connector on the cable into a downlink...

Page 41: ...ng a Cisco Nexus 9504 9508 or 9516 spine switch in the ACI fabric it must have only the 36 port 40 Gigabit ACI spine I O modules N9K X9736PQ You cannot mix other I O modules in the same chassis when running in ACI mode Step 1 For the transceivers with removable cables make sure that the transceivers are separated from their interface cables Step 2 Insert the appropriate transceiver into an active ...

Page 42: ...insert a transceiver more often than is necessary Repeated removals and insertions can shorten its useful life Keep all optical connections covered when not in use Clean them before using to prevent dust from scratching the fiber optic cable ends Do not touch the ends of connectors Touching the ends can leave fingerprints and cause other contamination Clean the connectors regularly the required fr...

Page 43: ...ow direction If the fan module has a burgundy stripe for port side intake airflow the power supplies must have burgundy or green coloring for the same airflow direction If a power supply has white coloring it can be used with fan modules using either port side intake or port side exhaust airflow To avoid over heating the switch make sure that the fan modules are positioned in one of the following ...

Page 44: ...aterials for safe shipping or storage Step 4 Follow these steps to replace the missing fan module within two minutes to avoid a shutdown a Remove the replacement fan module from its packing materials and place it on an antistatic surface Hold the module by its handle and do not touch the electrical connectors on its backside Also to protect the electrical connectors avoid letting them come in cont...

Page 45: ...rew to attach the module to the chassis 2 Holding the handle on the fan module slide its connector end into the fan slot until the front of the fan module is touching the chassis 1 d Verify that the STS LED turns on and becomes green If the STS LED does not turn on slide the module out of the chassis and visually check the electrical connectors on the back side of the chassis for damage If damaged...

Page 46: ...PE Port side intake burgundy latch 1200 W 16 A AC power source N9K PAC 1200W Port side exhaust blue latch 1200 W 16 A AC power source N9K PAC 1200W B Port side intake green latch 930 W 16 A DC power source UCSC PSU 930WDC Port side exhaust gray latch 930 W 16 A DC power source UCS PSU 6332 DC Removing an HVAC HVDC Power Supply If the switch has two power supplies you can replace one power supply w...

Page 47: ...e the power supply from the chassis by moving the power supply release latch to the left and then pulling the power supply part way out of the chassis Step 3 Place your other hand under the power supply to support it while you slide it out of the chassis Do not touch the electrical connectors on the back side of the module and prevent anything else from coming into contact with and damaging the co...

Page 48: ...pply Step 3 Grasp the power supply handle while pressing the release latch towards the power supply handle Step 4 Pull the power supply out of the bay Step 5 If you cannot replace the power supply fill the empty slot with a blank module part number N2200 P BLNK Otherwise you are ready to install a power supply in the open slot Installing an HVAC HVDC Power Supply This topic is for installing the h...

Page 49: ...each of the power cable that will be used with the replacement power supply If you are using n n power redundancy there must be a separate power source for each power supply installed in the chassis Otherwise only one power source is required There must be an earth ground connection to the chassis that you are installing the replacement module To ground the chassis see Grounding the Chassis on pag...

Page 50: ...ach of the power cable that will be used with the replacement power supply If you are using n n power redundancy there must be a separate power source for each power supply installed in the chassis Otherwise only one power source is required There must be an earth ground connection to the chassis that you are installing the replacement module To ground the chassis see Grounding the Chassis on page...

Page 51: ...he 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 Warning Before You Begin You must turn off the circuit breaker for the DC power cables that you are connecting to prevent electrocution Step 1 Verify that the circuit breaker for the DC power source ...

Page 52: ...lease the lever Step 6 Use a small screwdriver to depress the spring loaded wire retainer lever on the middle spring cage wire connector Insert your black DC negative wire into the aperture and then release the lever Step 7 Use a small screwdriver to depress the spring loaded wire retainer lever on the upper spring cage wire connector Insert your red DC positive wire into the aperture and then rel...

Page 53: ...0 to 40 C Standard perforated cabinets Solid walled cabinets with a roof fan tray bottom to top cooling Standard open racks If you are selecting an enclosed cabinet we recommend one of the thermally validated types either standard perforated or solid walled with a fan tray Note We do not recommend that you use racks that have obstructions such as power strips because the obstructions could impair ...

Page 54: ...pecific to Standard Open Racks If you are mounting the chassis in an open rack no side panels or doors ensure that the rack meets the following requirements The minimum vertical rack space per chassis must be one rack unit RU equal to 1 75 inches 4 4 cm The distance between the chassis air vents and any walls should be 2 5 inches 6 4 cm Requirements Specific to Perforated Cabinets A perforated cab...

Page 55: ...onmental Specifications Specification Environment 32 to 104 F 0 to 40 C Ambient operating temperature Temperature 40 to 158 F 40 to 70 C Ambient nonoperating 5 to 95 Ambient noncondensing Relative humidity 0 to 13 123 feet 0 to 4 000 meters Operating Altitude Switch Dimensions Height Depth Width Switch Component 3 5 inches 8 9 cm 2 RU 22 5 inches 57 1 cm 17 5 inches 44 5 cm Cisco Nexus 9336PQ chas...

Page 56: ... PAC 1200W B 930 W DC port side intake green UCSC PSU 930WDC 930 W DC port side exhaust gray UCS PSU 6332 DC Power Input Requirements The following table lists the typical amount of power consumed by the switch and it lists the maximum amount of power that you must provision from the power source as input to the power supply and switch for peak conditions Table 2 Switch Power Input Requirements Ma...

Page 57: ...immunity requirements you must use a foil twisted pair FTP cable that is properly grounded at both ends Caution The following figure shows the RJ 45 connector Figure 12 RJ 45 Connector Pin 2 2 Pin 1 1 Power Cord Specifications The following tables specify the power cables that you should order and use with AC or DCAC DC or HVAC HVDC power supplies Table 3 Power Cord Specifications for AC Power Sup...

Page 58: ...feet 2 5 m CAB 250V 10A CN Peoples Republic of China 250 V 10 A 8 2 feet 2 5 m CAB 250V 10A ID South Africa 250 VAC 10 A MP232 plug 8 2 feet 2 5 m CAB 9K10A SW Switzerland 250 VAC 10 A BS1363 plug 13 A fuse 8 2 2 5 m CAB 9K10A UK United Kingdom Table 4 Power Cable Specifications for DC Power Supplies Cord Set Description Power Cord Power Supply 8 AWG insulated cable 10 AWG minimum for each power s...

Page 59: ... for up to 240 V CAB HVAC C14 2M HVAC 2 foot 0 6 m cable with Saf D Grid and RT connector CAB HVAC RT 0 6M HVAC 6 6 foot 2 0 m cable with Saf D Grid and three terminal connectors CAB HVDC 3T 2M HVDC Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 49 System Specifications Power Cord Specifications ...

Page 60: ...Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 50 System Specifications Power Cord Specifications ...

Page 61: ...entify this module in the chassis Flashing blue BCN This module is not being identified Off The switch is operational Green STS The switch is booting up Flashing amber Temperature exceeds major alarm threshold Flashing red The switch is not receiving power Off Fans and power supply modules are operational Green ENV At least one fan or power supply module is not operating Amber Port is connected wi...

Page 62: ...ule as shown in the following table Table 6 Power Supply LED Descriptions Status LED LED Power supply is on and outputting power to the switch Off Green Power supply is connected to a power source but not outputting power to the switch power supply might not be installed in the chassis Off Flashing green Power supply is not receiving power Off Off Power supply warning possibly one of the following...

Page 63: ...y failure possibly one of the following conditions Over voltage Over current Over temperature Power supply fan failure Amber Flashing green Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 53 LEDs Power Supply LEDs ...

Page 64: ...Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 54 LEDs Power Supply LEDs ...

Page 65: ...ntents for the accessory kit N9K C9300 ACK Quantity Description Illustration 1 DB 9F RJ 45F PC terminal 1 kit Ground lug kit Two hole lug 1 M4 x 8 mm Phillips pan head screws 2 1 ESD wrist strap disposable 1 Hazardous substances list for customers in China Not applicable Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 55 ...

Page 66: ...TAC shtml If you purchased this product through a Cisco reseller you might receive additional contents in your kit such as documentation hardware and power cables Note For a list of the available power cables see r_n93xxx_power_cord_specs xml Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 56 Accessory Kits Accessory Kit Contents ...

Page 67: ...tion ventilation and accessibility The following table lists the site planning tasks that we recommend that you complete before you install the switch Your completion of each task ensures a successful switch installation Table 7 Site Preparation Checklist Verification Time and Date Planning Activity Space evaluation Space and layout Floor covering Impact and vibration Lighting Physical access Main...

Page 68: ... circuits for power redundancy UPS for power failures Grounding proper wire gauge and lugs Circuit breaker size Grounding evaluation Data center ground Cable and interface equipment evaluation Cable type Connector type Cable distance limitations Interface equipment transceivers EMI evaluation Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 58 Site Preparation and Maintenance Records...

Page 69: ...rson Contact phone Contact e mail Building site name Data center location Floor location Address line 1 Address line 2 City State Provence Contact person ZIP postal code Country Chassis and Module Information Use the following three worksheets to record information about the chassis and modules Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 59 Site Preparation and Maintenance Recor...

Page 70: ...ble 9 Network Related Information Switch IP address Switch IP netmask Hostname Domain name IP broadcast address Gateway router address DNS address Cisco Nexus 9336PQ ACI Mode Switch Hardware Installation Guide 60 Site Preparation and Maintenance Records Chassis and Module Information ...

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