Regulatory Model Numbers

This appendix lists the Regulatory Model Numbers (RMNs) for the product models for the switches described in this document.

Table 1. Regulatory Model Numbers and Product Numbers
Regulatory Model Number (RMN) Product Name(s)
N/A DCS-7050SX-128
N/A DCS-7050TX-128
N/A DCS-7050SX2-128
N/A DCS-7050TX2-128
N/A DCS-7250QX-64
N/A DCS-7260QX-64
AN1509 DCS-7260CX-64
AN1619 DCS7260CX3-64
AN1510 DCS-7280CR-48
AN1617 DCS-7280CR2-60, DCS-7280CR2A-60, DCS-7280CR2K-60
AN1621 DCS-7170-64C
AN1616 DCS-7280QR-C72
AN1718 DCS-7280CR3-96, DCS-7280CR3K-96
AN1719 DCS-7050SX3-96YC8

Rear Panel

This appendix displays the rear panel of all switches covered by this guide. Depending on the power supply and fan modules installed, the rear panel on your switch may appear slightly different.

Figure 1. Models Without Separation Between Fans 1 and 2

 
1 Fan Module 1 3 Fan Module 3 5 Power Supply Module 1
2 Fan Module 2 4 Fan Module 4 6 Power Supply Module 2
Figure 2. Models With Ground Attach Point Between Fans 1 and 2

 
1 Fan Module 1 4 Fan Module 4 7 Ground
2 Fan Module 2 5 Power Supply Module 1    
3 Fan Module 3 6 Power Supply Module 2    
Figure 3. Models With Separation Between Fans 1 and 2 (no ground)

 
1 Fan Module 1 5 Fan Module 3 9 Release
2 Release 6 Fan Module 4 10 Power Supply Module 2
3 Status LED 7 Power Supply Module 1    
4 Fan Module 2 8 Status LED    

Front Panel

This appendix displays the front panel of all switches covered by this guide.

Port-Speed Groups

Some of the devices shown in this appendix have ports that are grouped together to provide flexibility in configuring Ethernet speeds for the individual members of the group. The default configuration supports the maximum possible Ethernet speed and/or other lower, allowable speeds by the individual members of the group. Care must be taken when inserting optics for lower speed connectivity as further configuration may be required for the port(s) in the group to operate as desired.

For devices that support the port-speed group feature, the groups are called out in the relevant illustrations with the ports in the group identified.

Front Panels

Figure 1. DCS-7050SX-128

 
1 System status LED 4 Power supply 2 status LED 7 Ethernet management port 1
2 Fan tray status LED 5 Console serial port 8 Ethernet management port 2
3 Power supply 1 status LED 6 USB port 9 Port numbers

 

Figure 2. DCS-7050TX-128

 
1 System status LED 4 Power supply 2 status LED 7 Ethernet management port 1
2 Fan tray status LED 5 Console serial port 8 Ethernet management port 2
3 Power supply 1 status LED 6 USB port 9 Port numbers

 

Figure 3. DCS-7050SX2-128

 
1 System status LED 4 Power supply 2 status LED 7 Ethernet management port 1
2 Fan tray status LED 5 Console serial port 8 Ethernet management port 2
3 Power supply 1 status LED 6 USB port 9 Port numbers

 

Figure 4. DCS-7050TX2-128

 
1 System status LED 4 Power supply 2 status LED 7 Ethernet management port 1
2 Fan tray status LED 5 Console serial port 8 Ethernet management port 2
3 Power supply 1 status LED 6 USB port 9 Port numbers

 

Figure 5. DCS-7250QX-64

 
1 System status LED 4 Power supply 2 status LED 7 Ethernet management port 1
2 Fan tray status LED 5 Console serial port 8 Ethernet management port 2
3 Power supply 1 status LED 6 USB port   Port numbers

 

Figure 6. DCS-7260QX-64

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

 

Figure 7. DCS-7260CX-64

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

 

Figure 8. DCS-7260CX3-64 and DCS-7260CX3-64E

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

 

Figure 9. DCS-7280CR-48

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

 

Figure 10. DCS-7280CR2-60

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

 

Figure 11. DCS-7280CR2A-60

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

 

Figure 12. DCS-7280CR2K-60

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

 

Figure 13. DCS-7170-64C

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

 

Figure 14. DCS-7280QR-C72

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port    

There are twenty four port groups on the DCS-7280CR3-96. Groups are numbered sequentially from Group 1 (ports 1-4). Each group consists of four individual ports as shown (Figure 15).

 

Note: Groupings may be different from the one shown based on the software version being used.

 

Figure 15. DCS-7280CR3-96 / DCS-7280CR3K-96

 
1 Port groups 4 Power supply 1 status LED 7 USB port
2 System status LED 5 Power supply 2 status LED 8 Ethernet management port
3 Fan tray status LED6 6 Console serial port 9 Port numbers

There are twenty four port groups on the DCS-7050SX3-96YC8. Groups are numbered sequentially from Group 1 (ports 1-4). Each group consists of four individual ports as shown (Figure 16).

 

Note: Groupings may be different from the one shown based on the software version being used.

 

Figure 16. DCS-7050SX3-96YC8

 
1 Ethernet management port 4 Power supply 1 status LED 7 Console serial port
2 System status LED 5 Power supply 2 status LED 8 Port numbers
3 Fan tray status LED 6 USB port 9 Port groups

Parts List

Each switch provides an accessory kit that contains parts that are required to install the switch. This appendix lists the installation parts contained in the switch accessory kit.

Rack Mount Parts

Four-post rack mount parts are provided in the accessory kit. Two-post rack mount parts are available through your sales representative.

Four-Post Rack Mount Parts

Figure 1. Four-Post Rack Mount Parts

Two-Post Rack Mount Parts

Figure 2. Two-Post Rack Mount Parts

Cables

 
Quantity Description
2 Power cables: IEC-320/C13-C14, 13 A, 250 V, 2 meter
1 RJ-45 Patch Panel Cable, 2 meter
1 RJ-45 to DB9 Adapter Cable, 2 meter
Warning: All provided power cables are for use only with Arista products.

Status Indicators

Front Indicators

Switch Indicators

Front panel LEDs are located on the right side of the chassis and display system, fan, and power supply status. Front Panel displays the front panels of all switches covered by this guide.

Figure 1 displays the DCS-7050SX-128 front panel LEDs.

Figure 1. System Status Indicators

 
1 System status LED 3 Power supply module 1 status LED
2 Fan status LED 4 Power supply module 2 status LED
Table 1. Switch Indicators LED States
LED Name LED State Device Status
System Status Blinking Green System powering up.
Green All power supplies and fans are operating normally.
Blue The locator function is active.
Red A power supply or fan is missing or in a failed state.
Fan Status Green All fans are operating normally.
Red One or more fans are not inserted or have failed.
Power Supply 1 Status

Power Supply 2 Status

 Off Power supply is not inserted or is not powered.
Green Power supply operating normally.
Red Power supply has failed.

 

Note: Arista fixed systems take approximately 5-10 minutes to boot completely.

 

Port Indicators

Port LEDs, located in the vicinity of their corresponding ports, provide link and operational status. Port Indicators displays the Port LED location on the DCS-7050SX-128 switch. Front Panel displays the port LED locations of all switches covered by this guide.

Figure 2. Port LEDs

 
1 Upper port (1) LED 3 Upper port (49) LED
2 Lower port (2) LED 4 Lower port (50) LED

Table 2 provides status conditions that correspond to port LED states. Port LED behavior for QSFP+ and SFP+ ports is consistent.

Table 2. Port LED States
LED State Status
Off Port link is down.
Green Port link is up.
Yellow Port is software disabled.
Flashing Yellow Port failed diagnostics.

Rear Status Indicators

Fan and power supply modules are accessed from the rear panel. Each fan and power supply module contains an LED that reports the module status. Rear Panel displays the rear panel of all switches covered by this guide.

Fan Status LEDs are on the fan modules, as displayed in Figure 3.

Figure 3. Fan Status LED

 
1 Module installation indicator
2 Fan module status LED

The module installation indicator is green when the fan module is properly installed or red when the module is not fully installed. Table 3 provides status conditions that correspond to fan status LED states.

Table 3. Fan Status LED States
LED State Status
Off The fan module is inserted but not receiving power – it may not be properly seated.
Green The fan is operating normally.
Red The fan has failed.

The Power Supply Status LEDs are on the power supply modules, as displayed in Figure 4.

Figure 4. Power Supply Status LED

 
1 Power supply status LED

Table 4 provides status conditions that correspond to power supply status LED states.

Table 4. Power Supply Status LED States
LED State Status
Off Power supply not connected to AC power or not inserted fully.
Green Power supply operating normally.
Amber Power supply has overheated or failed.

Cabling the Switch

Grounding the Switch

After mounting the switch into the rack, connect the switch to the data center ground.

 

Important: Grounding wires and grounding lugs (M4 x 0.7) are not supplied. Wire size should meet local and national installation requirements. Commercially available 6 AWG wire is recommended for installations in the U.S.

 

À la terre et de mise à la terre fils cosses (M4 x 0.7) ne sont pas fournis. Calibre des fils doit satisfaire des exigences de l’installation locale et nationale. Disponible dans le commerce 6 fils AWG est recommandé pour les installations aux États-Unis.

 

Models with Grounding Pads

Use the grounding pads (Figure 1) to attach the grounding lug before connecting to the data center ground.

Figure 1. Earth Grounding for Models with Ground Attach Point

 
1 Fan Module 1 4 Fan Module 4 7 Grounding
2 Fan Module 2 5 Power Supply Module 1    
3 Fan Module 3 6 Power Supply Module 2    

Models without Grounding Pads

For models that do not have grounding pads, use an adapter as shown for the DCS-7050SX3-96YC8 (Figure 2). Assemble an adapter to attach to the chassis (Grounding Adapter Assembly). Attach the grounding lug to the adapter, once it is attached to the chassis.

 

Note: A representative 1 RU chassis is used for the illustrations to highlight the grounding adapter assembly and attachment.

 

Figure 2. Earth Grounding Adapter for Models such as DCS-7050SX3-96YC8

Grounding Adapter Assembly

Use the following steps to assemble and attach a grounding assembly to the chassis before mounting it into the rack for models that require the grounding adapter. Figure 3 shows the exploded and assembled views.
Figure 3. Earth Grounding Adapter Assembly for Models such as DCS-7050SX3-96YC8
Note: The chassis is shown upside down in the following figure.

  1. Identify all the components to be assembled:
    • 1x Grounding adapter
    • 1x Grounding bracket
      • 2x Flat-head screws (Phillips,M4 x 5.00 long, stainless steel)
      • 2x Hex nuts (#10-32, Serrated Flange, stainless steel)
      • 1x Grounding lug (Copper, 2-hole, 6 AWG, straight barrel)
  2. Insert the grounding adapter through the holes in the grounding bracket.
  3. Insert the ground lug on to the grounding adapter studs and fasten using the hex nuts to form the grounding assembly.
  4. With the chassis on its top on a flat surface, attach the grounding assembly to the chassis using the flat head screws.
  5. Turn the chassis over before mounting it into a rack and connecting cables.

Connecting Power Cables

Important: Installation of this equipment must comply with local and national electrical codes. If necessary, consult with the appropriate regulatory agencies and inspection authorities to ensure compliance.

 

Installation de cet équipement doit être conformes aux codes électriques locaux et nationaux. Si nécessaire, consulter les organismes de réglementation appropriés et des autorités de contrôle pour assurer la conformité.

 

The switch operates with two installed power supplies. At least one power supply must connect to a power source. Two circuits provide redundancy protection.

Rear Panel displays the location of the power supplies on the rear panel of the switch.

 

Important: Read all installation instructions before connecting the system to the power source.

 

Lire toutes les instructions d'installation avant de brancher le système à la source d'alimentation.

 

  • Non-Redundant Configuration: Connect power to either of the two power supplies.
  • Redundant Power Supply Configuration: Connect power to both power supplies.

  • Power down the Switch: Remove all power cords and wires from the power supplies.

     

    Important: This equipment must be grounded. Never defeat the ground conductor.

     

    Cet équipement doit être mis à la terre. Ne jamais modifier le conducteur de terre.

     

    Important: This unit requires overcurrent protection.

     

    Cet appareil requiert une protection contre les surintensités.

     

AC Power Supplies

(Figure 4) shows a supported AC power supply. The following AC power supplies are supported.

 

Note: Several PSUs support both forward and reverse airflow directions.

 

 
PWR-500AC PWR-1900AC PWR-2411-AC
PWR-1100AC PWR-745AC PWR-1011-AC

Power requirements vary by switch. Refer to Table 3 for information regarding your system as devices are supported only by the specified power supplies. The AC power supply connects to a circuit that provides the required power.

Figure 4 displays an AC power supply, including the power socket on the left side of the module.

Figure 4. AC Power Supply

The accessory kit provides two IEC-320 power cables for the supported power supply for the device.

DC Power Supplies

The following power supplies are supported.
 
PWR-500DC PWR-2411-DC
PWR-1900DC PWR-1011-DC

Figure 5 displays two supported DC power supplies.

 

Note: Several PSUs support both forward and reverse airflow directions.

 

Figure 5. Supported DC Power Supplies

 

Important: A disconnect device must be provided as part of the installation.

 

Un dispositif de sectionnement doit être fourni dans le cadre de l'installation.

 

Important: Ensure power is removed from DC circuits before performing any installation actions. Locate the disconnect device, circuit breakers or fuses on DC power lines servicing the circuits. Turn off the power line circuits or remove the fuses.

 

Pouvoir assurer qu'il est retiré de circuits DC avant d'effectuer des actions d'installation . Localiser les disjoncteurs ou des fusibles sur les lignes de courant continu desservant les circuits. Coupez les circuits de lignes d'alimentation ou retirer les fusibles.

 

Important: Wire size must comply with local and national requirements and electrical codes. Use only copper wire.

 

Le calibre du fil doit être conforme aux exigences locales et nationales et les codes électriques. Utiliser du fil de cuivre.

 

Important: Apply ground connection to the switch first during installation and remove last when removing power.

 

Appliquer connexion à la terre à l'interrupteur premier lors de l'installation et de supprimer la dernière alimentation lors du débranchement.

 

Wire and Lug Preparation

Before performing any installation actions, ensure power is removed from DC circuits by turning off the power line servicing the circuits. Prepare the stranded wiring before you begin a DC power installation.

 

Note: Stranded copper wiring is required and should meet local and national installation requirements. Wires and grounding lugs are not supplied.

 

  1. Attach an ESD grounding strap.
  2. Prepare the stranded copper wiring for the power supply to be used. Table 1 provides wiring, lug, and tightening torque information for the power supplies covered in this guide.
    Table 1. Wiring, Lug, and Tightening Torques for DC PSUs
    PSU Wire Size (1) Lug Type (2) Tightening Torque
    (AWG) (mm 2 ) N • m in. • lbs.
    PWR-500-DC 14 or larger 2.0 or larger ring or spade/fork 1.0 9
    PWR-1900-DC 4 - 6 21.2 - 13.3   2.7 24
    PWR-1011-DC 6 - 8 16.0 - 10.0   2.7 24
    PWR-2411-DC 2 - 4 35.0 - 25.0   2.7 24

    1. Unless otherwise noted, wire size applies to -48V, Battery return, and Protective earth wires.

    2. Unless otherwise noted, twin #10 studs spaced for dual-hole lug with 5/8" hole spacing.

  3. Strip the wires to the appropriate length for the lugs to be used.
  4. Use agency-approved compression (pressure) lugs for wiring terminations.
  5. Slip on heat-shrink tubing on the wire ends before assembling the lugs on to the wire.
  6. Crimp the lugs with the proper tool, and ensure that the tubing extends over the barrel of the lugs and the insulation on the wires (Figure 6).
    Figure 6. Lug Preparation
     
    1 Insulated wire 3 Lug B 1/2”
    2 Heat-shrink tubing A 1/4” C 5/8”
    Note: Dimension B is the width of the lug (not visible on the right angle lug).
  7. Shrink the tubing with a heat gun.

Connecting a DC Power Supply to Power Source

Figure 7 displays an example of connecting a PSU. To connect a DC power supply to a power source, perform the following:

  1. Prepare the stranded wiring (Wire and Lug Preparation).
  2. Attach the appropriate lugs to the source DC wires.
  3. Connect the DC-input wires to the appropriate terminals using the specified torque (Table 1) in the following order.

     

    Note: Remove terminal covers as needed.

     

    1. Ground wire to the Protective Earth (PE ) terminal.
    2. Negative source DC cable to the negative (- / -48V) terminal.
    3. Positive (+) source DC cable to the positive (+ / Rtn) terminal.
  4. Replace the terminal covers as required.
    Figure 7. DC PSU Connection Example

Connecting Serial and Management Cables

The accessory kit includes the following cables:

  • RJ-45 to DB-9 serial adapter cable.
  • RJ-45 Ethernet cable.

Table 2 lists the pin connections of the RJ-45 to DB-9 adapter cable.

Table 2. RJ-45 to DB-9 Connections
RJ-45 DB-9   RJ-45 DB-9
RTS 1 8 CTS   GND 5 5 GND
DTR 2 6 DSR   RXD 6 3 TXD
TXD 3 2 RXD   DSR 7 4 DTR
GND 4 5 GND   CTS 8 7 RTS

The front panel contains the console, management, and USB ports. Figure 8 displays the ports on the DCS-7050SX-128 switch. Front Panel displays the front panel of all switches covered by this guide.

Figure 8. Front Panel Ports

 
1 Console serial port 2 USB port 3 Ethernet management ports

Connect the front panel ports as follows:

  • Console (Serial) Port: Connect to a PC with the RJ-45 to DB-9 serial adapter cable. The switch uses the following default settings:

    • 9600 baud
    • No flow control
    • 1 stop bit
    • No parity bits
    • 8 data bits
  • Ethernet Management Port: Connect to 10/100/1000 management network with RJ-45 Ethernet cable.

  • USB Port: The USB port may be used for software or configuration updates.

     

    CAUTION: Excessive bending can damage interface cables, especially optical cables.

     

    Flexion excessive peut endommager les câbles d'interface, notamment des câbles optiques.

     

Configuring the Switch

Arista switches ship from the factory in Zero Touch Provisioning (ZTP) mode. ZTP configures the switch without user intervention by downloading a startup configuration file or a boot script from a location specified by a DHCP server. To manually configure a switch, ZTP is bypassed. The initial configuration provides one username (admin) accessible only through the console port because it has no password.

When bypassing ZTP, initial switch access requires logging in as admin, with no password, through the console port. Then you can configure an admin password and other password protected usernames.

This manual configuration procedure cancels ZTP mode, logs into the switch, assigns a password to admin, assigns an IP address to the management port, and defines a default route to a network gateway.

  1. Provide power to the switch (Cabling the Switch).
  2. Connect the console port to a PC (Connecting Serial and Management Cables).

    As the switch boots without a startup-config file, it displays the following through the console:

    The device is in Zero Touch Provisioning mode and is attempting to download the startup-config from a remote system. The device will not be fully functional until either a valid startup-config is downloaded from a remote system or Zero Touch Provisioning is cancelled. To cancel Zero Touch Provisioning, login as admin and type 'zerotouch cancel' at the CLI.
    localhost login:
  3. Log into the switch by typing admin at the login prompt. 
    localhost login: admin
  4. Cancel ZTP mode by typing zerotouch cancel.
    IMPORTANT: This step initiates a switch reboot. 
    localhost>zerotouch cancel
  5. After the switch boots, log into the switch again by typing adminat the login prompt. 
    Arista EOS
localhost login:admin
Last login: Fri Mar 15 13:17:13 on console
  6. Enter global configuration mode. 
    localhost>enable
localhost#config
  7. Assign a password to the admin username with the username secret command. 
    localhost(config)#username admin secret pxq123
  8. Configure a default route to the network gateway. 
    localhost(config)#ip route 0.0.0.0/0 192.0.2.1
  9. Assign an IP address (192.0.2.8/24 in this example) to an Ethernet management port. 
    localhost(config)#interface management 1
localhost(config-if-Ma1/1)#ip address 192.0.2.8/24
  10. Save the configuration by typing write memory or copy running-config startup-config. 
    localhost#copy running-config startup-config
    When the management port IP address is configured, use this command to access the switch from a host, using the address configured in step 9: 
    ssh admin@192.0.2.8

    Refer to the Arista Networks User Manual for complete switch configuration information.

Preparation

The following topics are covered in this section:

Site Selection

The following criteria should be considered when selecting a site to install the switch:

  • Temperature and Ventilation: For proper ventilation, install the switch where there is ample airflow to the front and back of the switch. The ambient temperature should not go below 0° or exceed 40°C.
    Important: To prevent the switch from overheating, do not operate it in an area where the ambient temperature exceeds 40°C (104°F).

    Pour empêcher l'interrupteur de surchauffe, ne pas utiliser il dans une zone où la température ambiante est supérieure à 40°C (104°F).

  • Airflow Orientation: The fans and PSUs determine the airflow direction through the switch. The color of the visible handles or labels indicate the airflow direction.
    Note: The figures shown use representative Arista switches to illustrate airflow directions. For some switches, label color indicates the airflow direction.
    • Blue Handle: Air Inlet module. The following figure shows the airflow through the switch with air inlet modules:
      Figure 1. Air Inlet Module

       

    • Red Handle: Air Exit module. The following figure shows the airflow through the switch with air exit modules:
      Figure 2. Air Exit Module
    Orient the switch such that the airflow through the switch is from the cooler to the hotter aisle. If the airflow direction is not compatible with the installation site, reorient the fan modules to circulate air in the opposite direction.
  • Rack Space: Install the switch in a 19" rack or cabinet. The switch height is 2 RU. The accessory kit provides mounting brackets for four-post racks. Contact your sales representative to obtain two-post mounting brackets.

    When mounting the switch in a partially filled rack, load the rack from bottom to top, with the heaviest equipment at the bottom. Load the switch at the bottom if it is the only item in the rack.

  • Power Requirements: Power requirements vary by switch and power supply model. Refer to Table 3 for information regarding your specific system.

    Two circuits provide redundancy protection. Grounding the Switch describes power cable requirements.

     

    Important: The power input plug-socket combination must be accessible at all times; it provides the primary method of disconnecting power from the system.

     

    La combinaison de la puissance-prise d'entrée doit être accessible en tout temps ; Il fournit le principal moyen de coupure d'alimentation du système.

     

  • Other Requirements: Select a site where liquids or objects cannot fall onto the equipment and foreign objects are not drawn into the ventilation holes. Verify these guidelines are met:
    • Clearance areas to the front and rear panels allow for unrestricted cabling.
    • All front and rear panel indicators can be easily read.
    • Power cords can reach from the power outlet to the connector on the rear panel.
      Important: All power connections must be removed to de-energize the unit.

       

      Toutes les connexions d'alimentation doivent être enlevées pour hors tension l'appareil.

       

      Important: This unit is intended for installation in restricted access areas.

       

      Cet appareil est prévu pour une installation dans les zones d'accès restreintes.

       

Reconfiguring Air Flow

Some switches allow configuration with either front-to-rear or rear-to-front airflow. To reconfigure a system, de-energize the unit and replace all fans and power supplies with the desired orientation. Mixing front-to-rear and rear-to-front components is not supported and will impact the cooling capacity of the switch.

DCS-7260CX3 and DCS-7170-64 systems contain additional louvers behind the fan tray. These louvers follow the same color coding as the fans and must be removed, rotated and replaced when changing airflow orientation.

The following figures show the location of the louvers.
Note: All PSUs and fans must be of the same airflow orientation in a switch.

 

To replace the lover behind the fan:
  1. Lift the tab up.
  2. Rotate and remove the louver.
  3. Rotate the louver so the desired color is on the outside.
  4. Slide and seat the louver until it clicks into place.

Tools and Parts Required for Installation

The following tools and equipment are required to install the switch:

Two-Post Rack

  • Screws or rack mounting nuts and bolts.
  • Screwdriver

Four-Post Rack (Toolless)

No additional equipment required.

Accessory kit does not include screws for attaching the switch to the equipment rack. When installing the switch into an equipment rack with unthreaded post holes, nuts are also required to secure the switch to the rack posts.

Electrostatic Discharge (ESD) Precautions

Observe these guidelines to avoid ESD damage when installing or servicing the switch.
  • Assemble or disassemble equipment only in a static-free work area.
  • Use a conductive work surface (such as an anti-static mat) to dissipate static charge.
  • Wear a conductive wrist strap to dissipate static charge accumulation.
  • Minimize handling of assemblies and components.
  • Keep replacement parts in their original static-free packaging.
  • Remove all plastic, foam, vinyl, paper, and other static-generating materials from the work area.
  • Use tools that do not create ESD.

Rack Mounting the Switch

The following topics are covered in this section:

Important: The rack mounting procedure is identical for all switches covered by this guide. Illustrations in this chapter depict the mounting of a DCS-7050SX-128 switch.

 

Les procédure de montage du bâti est identique pour tous les commutateurs visés par ce guide. Illustrations dans ce chapitre montrent le montage d'un interrupteur de DCS-7050SX-128.

 

After completing the instructions for your rack type, proceed to Cabling the Switch.

Two-Post Rack Mount

To mount the switch onto a two-post rack, assemble the mounting brackets to the chassis, then attach the brackets to the rack posts. Two-post accessory kits includes 2 three-hole mounting brackets.

Each chassis side has attachment pins that align with bracket holes; the number of pins (six or seven) varies by switch model. Pin orientation is symmetric and equidistant, supporting bracket placement where the flange is either flush with the front and rear panels, or not flush with the panels. Each bracket hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.

 

Important: Attachment pins must engage all three upper bracket holes.

 

Goupilles de fixation doivent s’engager tous les trois trous de la bride supérieure.

 

Bracket Mount Examples for Two-Post Rack Mount displays proper bracket mount configuration examples. Improper Bracket Mount Examples for Two-Post Rack Mount displays improper bracket mount configuration examples.

Figure 1. Bracket Mount Examples for Two-Post Rack Mount

Figure 2. Improper Bracket Mount Examples for Two-Post Rack Mount

Attaching Mounting Brackets to the Chassis

This procedure attaches mounting brackets to the switch chassis

  1. Align the mounting brackets with the attachment pins to obtain the desired mounting position.
  2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
  3. Slide the bracket toward the front flange until the bracket clip locks with an audible click.
    Figure 3. Attaching the Mounting Brackets to the Switch Chassis

    To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip with a flathead screwdriver and slide the bracket away from the front flange (opposite from the installation direction).

Inserting the Switch into the Rack

This procedure attaches the switch to the rack.

  1. Lift the chassis into the rack. Position the flanges against the rack posts.
    Figure 4. Inserting the Switch into the Rack

  2. Select mounting screws that fit your equipment rack.
  3. Attach the bracket flanges to the rack posts.

    After completing the two-post rack mount, proceed to Cabling the Switch.

Four-Post Rack Mount

The switch is mounted onto a four-post rack by assembling two rails onto the rear posts, sliding the switch onto the rails, then securing the switch to the front posts.

The installation kit provides two bracket-rail assemblies. The following four-post mounting parts are extracted from each assembly:
  • Six-hole mounting bracket
  • Rail

Each chassis side has attachment pins that align with bracket holes; the number of pins (six or seven) varies by switch model. Pin orientation is symmetric and equidistant, supporting bracket placement where the flange is either flush with the front and rear panels, or not flush with the panels. Each bracket hole includes a key-opening for placing the bracket flush with the chassis and then locking it into place.

 

Important: Attachment pins must engage all six bracket holes.

 

Goupilles de fixation doivent s’engager tous les trous de support six.

 

Figure 5 displays proper bracket mount configuration examples. Figure 6 displays an improper bracket mount configuration examples.

Figure 5. Bracket Mount Examples for Four-Post Rack Mount

Figure 6. Improper Bracket Mount Example for Four-Post Rack Mount

Off-set mount is always an improper bracket mount configuration on switches that have six attachment pins on each side.

Extracting the Brackets and the Rails

Figure 7 displays a bracket-rail assembly and the component pieces (bracket and rail) that are extracted from the assembly. Each assembly must be separated into its component pieces before mounting the switch into a four-post rack. The two assemblies supplied with the switch are identical.

Figure 7. Bracket-Rail Assembly – Before and After Extraction

This procedure separates a bracket-rail assembly into its component pieces.

  1. Grip the rail with your right hand, as shown in Extracting the Bracket Rail Assembly-Left. Pull the bracket flange away from the rail flange with your left hand until the bracket clip catches on the rail (Extracting the Bracket Rail Assembly-Right).

    If the bracket flange resists initially, verify the thumb screw on the bracket flange is not attached to the rail flange.

    Figure 8. Extracting the Bracket-Rail Assembly

    1 Inset A 5 Bracket flange 9 Inset B (detail)
    2 Rail (Grip here) 6 Thumb screw 10 Locking clip
    3 Inset A (detail) 7 Inset B    
    4 Rail flange 8 Locking clip    
  2. While pressing the locking clip on the bracket (Extracting the Bracket Rail Assembly-Right), resume pulling the bracket from the rail until the separation is complete.
  3. Repeat the procedure for the other assembly.

Attaching Mounting Brackets to the Chassis

The Figure 9 displays the front bracket alignment for mounting the switch into a four-post rack.

This procedure attaches mounting brackets to the switch chassis as depicted by Figure 10.

  1. Align the mounting brackets with the attachment pins to obtain the desired mounting position.
  2. Place the bracket flush on the chassis with attachment pins protruding through key-openings.
  3. Slide the bracket toward the front flange until the bracket clip locks with an audible click.
    Figure 9. Front Bracket Alignment

    To remove the mounting bracket from the chassis, lift the front edge of the mounting bracket clip with a flathead screwdriver and slide the bracket away from the front flange (opposite from the installation direction).

    Figure 10. Attaching the Mounting Brackets to the Switch Chassis

    1 Bracket Clip
    2 Bracket Clip

Expanding the Rails

The rail is a two-piece mechanism. The rail length is adjusted by sliding the rail-rod inside the rail-slide. The rail clip prevent extension of the rail beyond the maximum supported distance between front and rear rack posts. When the rail is contracted, the rail clip is closest to the slide end.

The rail is initially contracted and must be expanded to attach onto the rack. This procedure expands the rails from their contracted state:

  1. Grip the slide end with your left hand and the rod end with your right hand (Expanding the Rails-Left).
  2. Pull the ends apart until the rail-clip makes an audible click (Expanding the Rails-Right).
    Figure 11. Expanding the Rails

    1

    Rail-slide end (grip with left hand)

    3

    Rail-rod end (grip with right hand)

    5

    Inset A (detail)

    2

    Rail clip

    4

    Inset A

    6

    Rack plugs

Assembling the Rails onto the Equipment Rack

A rail connects a front post to a rear post. Each end has two rack plugs (Attaching the Rails, Left-Inset 4Expanding the Rails - Right, Inset A). Rails are installed into a rack by inserting the plugs into rack slots. To install rails into posts with threaded or rounded holes, remove all plugs on both sides of the rails, then install the rails with bolts that fit the rack. This procedure attaches the rails to a four-post rack:
  1. Attach rail to the right rear rack post by inserting rod-end rack plugs into post slots (Attaching the Rails - Right, Inset A). The slide assembly must be inside the right posts, relative to the left rack posts.

    If the rack plugs were previously removed, use bolts to attach the rail to the rack.

  2. Attach the slide end of the rail to the front post by extending the rail end past the post, then contracting the rail while guiding the rack plugs into the post (Attaching the Rails - Inset B).
  3. Repeat Step 1 through Step 2 for the left posts. Ensure the rails are on the same horizontal level.
    Figure 12. Attaching the Rails

    1 Inset A 3 Inset B
    2 Inset A (detail) 4 Inset B (detail)

Attaching the Switch to the Rack

After the rails are installed, the switch slides on the rails into the rack. Each bracket includes a thumb screw that attaches the switch to the rail.
  1. Lift the switch into the rack and insert the mounting brackets into the slide rails.
  2. Slide the switch on the rails, toward the rear posts, until the mounting bracket flanges are flush with the rail flanges attached to the rack posts.
    Figure 13. Inserting the Switch onto the Rails

  3. Attach the bracket flanges to the rack post using the quick-release thumb screws supplied with the brackets.
    Figure 14. Attaching the Switch to the Rack Posts

    1 Inset A
    2 Inset A (detail)

    After completing the four-post rack mount, proceed to Cabling the Switch.