Regulatory Model Numbers

This section lists the Regulatory Model Numbers (RMNs), where applicable, for the product models for the switches described in this document.

 

Table 1. Regulatory Model Numbers and Product Numbers
Regulatory Model Number (RMN) Product Number(s)
7804 7804
7808 7808
7812 7812
7816 7816
7816L 7816L

 

Maintenance and Field Replacement

This section discusses the process for replacing switch components.

You must ensure that at least one of the secondary grounding pads on the chassis's front panel is connected to the data center ground. While working on the switches, use grounded, anti-static wrist straps connected to one of the attach points on the switch to ground yourself and prevent ESD damage to the switch.

 

Note: Illustrations in this section are examples of a representative switch and component(s). Apply procedures to component(s) supported by the specific switch. You must use component(s) and the appropriate slots for those component(s) when replacing or adding them.

 

 

Inspect the connectors for damage before installing components into the chassis.

Linecard and Supervisor Extraction Tools

Assemble and tether the extraction tools to remove and insert linecards and supervisor modules into the chassis.

 

Note:The Front Panel shows the locations for tethering and storing the extraction tools.

 

Assembling and Storing the Extraction Tools

The extraction tools come with a lanyard and tethering plug, as shown in Figure 1.

 

Figure 1. Linecard and Supervisor Module Extraction Tool and Tether Assembly


 

Use the following steps to attach the tethering mechanism to the extraction tool.

  1. Extend and slip the lanyard thread through the slot in the plastic tether.
  2. Attach the ring to the extraction tool.
  3. Plug the plastic tether into one of the slots (Figure 1).
  4. Repeat for the other tools as appropriate.
     

Power Supplies

The switches support AC or DC Power supplies. Depending on the switch model, they ship with a number of populated slots. Empty slots are covered with a blank. To add a new power supply in one of the available slots, remove the blank covering the slot before inserting a new power supply. When adding or replacing power supplies, perform the following steps for ESD protection.

 

Note: The front panel shows the power supply locations for your device.

 

 

  1. Connect at least one of the chassis grounding pads located on the front and rear panels of the chassis to the data center ground as needed to ensure that the switch is grounded.
  2. Put on an anti-static ESD wrist strap and connect it to one of the attach points on the switch.
  3. To add the new power supply, remove the power supply to be replaced (Removing AC Power Supply, Removing DC Power Supply) or the blank for the slot (Removing Power Supply Blank).
     

Removing AC Power Supply

Perform the following steps to remove an AC power supply.
  1. Put on a grounded, anti-static ESD strap.
  2. Unplug the cable(s) by squeezing the cable release. Up to two cables could be powering each PSU.
  3. Squeeze the latch release.
  4. Remove the power supply from the switch using the power supply latch release and handle.
     

Installing AC Power Supply

You must make space for installing the power supply by removing an existing one (Removing AC Power Supply, Removing DC Power Supply) or removing a blank (Removing Power Supply Blank) from a power supply slot available on the switch.

Perform the following steps to install an AC power supply:

  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the new power supply.
  3. Insert the new power supply into the empty power supply slot.
  4. After you insert the power supply, push gently on the power supply until the power supply is fully seated.
  5. Connect the power cord(s) to the power supply. Up to two cables can power each PSU.
  6. Connect to the power source.
  7. Verify normal operation using the LED indicators for your switch Table 5 - AC Power Supply Status LED States.
     

Removing DC Power Supply

  • Remove power from DC circuits by turning off the power line servicing the circuits.
  • Make sure to remove the ground connection last when removing power.

     

  1. Put on a grounded, anti-static ESD strap.
  2. Disconnect the power cable from the DC power source.
  3. Squeeze the latch release.
  4. Remove the power supply from the switch using the power supply latch release and handle.
  5. Remove each power cable lug to the terminal studs with the flange locking nuts.
  6. Remove the flange locking nuts to each of the terminal studs.
  7. Disconnect the power cable lug from the terminal studs.
     

Installing DC Power Supply

You must make space for installing the power supply by removing an existing one (Removing AC Power Supply, Removing DC Power Supply) or removing a blank (Removing Power Supply Blank) from a power supply slot available on the switch.
Perform the following steps to install a DC power supply.
  1. Put on a grounded ESD strap.
  2. Unpack the new power supply.
  3. Connect the cables for your power supply as explained in the guide (Cabling the Modular Switch).
  4. Insert the new power supply into the empty power supply slot.
  5. After you insert the power supply, push gently on the power supply until the power supply is fully seated.
  6. Connect to the power source.
  7. Verify normal operation using the LED indicators for your switch Table 6 - DC Power Supply Status LED States.
     

Removing Power Supply Blank

Friction holds The power supply blank in place.
  1. Put on a grounded, anti-static ESD strap.
  2. Remove the blank from the power supply slot you are going to populate.

     

    Note: You can save the blank for future use as needed. A blank is needed for the switch to operate normally in an unpopulated power supply slot.

     

     

Fabric and Fan Module (Fabric Module)

The fabric and fan modules are hot-swappable and accessible from the switch's rear panel (Rear Panel). You must consider that the module you are inserting is compatible with the switch and the module you are replacing. Perform the following steps to remove and replace a fabric and fan module or a fan-only module if your switch supports one.

 

Note: The DCS-7816 switch has twelve fabric modules, each half-height.

 

Removing Fabric Module

  1. Put on a grounded, anti-static ESD strap.
  2. Loosen the two Phillips screws on the fabric module.

     

    Note: The DCS-7812R3-FM fabric module has green latch release buttons. Use these instead.

     

  3. Pull out the ejector levers on the fabric module.

     

    1 Fabric module ejector levers 3 Fabric module ejector claws 5 Fabric module ejector claw
    2 Claw position on chassis 4 Claw position on chassis 6 Claw position on chassis

     

  4. Pull the ejector handles outwards by 90 degrees to disengage the fabric module.
  5. Pull on the ejector handles to remove the fabric module from the slot.

     

    Note: Fabric modules can be heavier than 25 lbs. Provide adequate support while handling them to prevent injury or damage.

     

Installing Fabric Module

You must make space for installing the module by removing an existing one (Removing Fabric Module) from a fabric module slot available on the switch.
Perform the following steps to install the module:
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the module to be installed.
  3. Slide the module into the open slot until the injector claw touches the chassis's rear face.

     

     

    1 Fabric module top right injector claw 4 Claw position on chassis 7 Fabric module bottom left injector claw
    2 Fabric module top right ejector claw 5 Fabric module top injector claws 8 Claw position on chassis
    3 Fabric module ejector levers 6 Claw position on chassis    

     

  4. Fully open the ejector levers at 90 degrees and seat the module.

     

    Note: The ejector claws should be touching the rear face of the chassis.

     

     

    1 Fabric module ejector levers 3 Fabric module seating claws 5 Fabric module seating claw
    2 Claw position on chassis 4 Claw position on chassis 6 Claw position on chassis

     

  5. Close the ejector levers in unison.

     

    1 Fabric module ejector levers 4 Claw position on chassis 7 Screw
    2 Claw position on chassis 5 Fabric module ejector claw 8 Screw
    3 Fabric module ejector claws 6 Claw position on chassis    

     

    CAUTION: Ensure that the claws engage correctly on the chassis.

     

     
  6. Screw in the two Phillips screws using a PH3 driver on a battery-operated screwdriver with torque set between 16 and 18 in-lbs.

     

    Note: The DCS-7812 does not require screws. The green latch release buttons will pop out when the fabric module is seated.

     

     

  7. Verify that the module is operates normally (Table 4).
  8. Use the show environment cooling command to verify normal operation further.

Fan Module (within Fabric Module)

The fabric and fan modules are hot-swappable and accessible from the switch's rear panel (Rear Panel). You must ensure that the module you insert is compatible with the switch and the module you are replacing. Perform the following steps to remove and replace a fan module that is part of the fabric module.

  1. Remove the fabric module with the fan to be replaced (Removing Fabric Module).
  2. Place the fabric module on a flat work surface. A cart or table designated for such tasks is typically appropriate.
  3. Locate the failed fan and
    1. Push the green latch, then
    2. Rotate the fan lever to the open position.

       

      Note: See figure below.

       

     

    1 Release latch
    2 Fan lever

     

  4. Lift the fan straight up and out of the fabric module.
  5. Insert the replacement fan straight down and into the fabric module.
  6. Rotate the fan lever to the closed position.
  7. Ensure that the green latch has securely slid into the latched and locked position.
  8. Reinstall the fabric module into the chassis (Installing Fabric Module).

 

Note: The DCS-7816 switch has twelve fabric modules, each half-height, and currently does not have a label depicting fan removal.

 

Supervisor Module

The supervisor modules are hot-swappable and accessible from the front of the switch. You must consider that the module you are inserting is compatible with the switch and the module you are replacing. Use the following procedure to remove and replace a supervisor module. For the supervisor module locations for your device, refer to the Front Panel.

Removing Supervisor Module

Perform the following steps to remove the module.
  1. Put on a grounded ESD strap.
  2. Use the extraction tool supplied (Front Panel) to unlock the supervisor card.
  3. Pull the supervisor module out.
  4. Slide the supervisor module out of the slot.
     

Installing Supervisor Module

You must make space for installing the module by removing an existing one (Removing Supervisor Module) or a blank (Removing Supervisor Module Blank) from a supervisor module slot available on the switch.

 

Perform the following steps to install the module:
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the supervisor module to be installed.
  3. Slide the supervisor module into the slot.
  4. Lock the supervisor module using the tool supplied (Front Panel).
  5. Verify that the module is operating normally (Table 1).
     

Removing Supervisor Module Blank

The supervisor module blank has plastic latches.
  1. Put on a grounded, anti-static ESD strap.
  2. Grip the plastic handles to release the latch and remove the blank from the supervisor module slot you are going to populate.

    You can save the blank for future use as needed. A blank is needed for the switch to operate normally in an unpopulated supervisor module slot.

     

Linecards

The linecards are hot-swappable and accessible from the front of the switch. You must consider that the linecard you are inserting is compatible with the switch and the linecard you are replacing. Use the following procedure to remove and replace a linecard. If you are adding a new linecard, remove the blank from the linecard slot and install the new linecard. For the linecard locations on your switch, refer to the Front Panel.

 

Removing Linecard

Perform the following steps to remove a linecard:
  1. Put on a grounded, anti-static ESD strap.
  2. Use the tools supplied (Front Panel) simultaneously on each end of the linecard.
  3. Pull the linecard out gently after being released.
  4. Slide linecard out of the slot.
     

Installing Linecard

You must make space for installing the linecard by removing an existing one (Removing Linecard) or a blank (Removing Linecard Blank) from a linecard slot available on the switch.
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the linecard to be installed.
  3. Slide the linecard into the slot.
  4. Use the tools supplied (Front Panel) simultaneously on each end of the linecard to lock it in place.
  5. Verify that the linecard is operates normally (Linecard Module Indicators).
     

Removing Linecard Blank

Perform the following steps to remove linecard blank:
  1. Put on a grounded, anti-static ESD strap.
  2. Grip the plastic handles to release the latch and remove the blank from the linecard slot you will populate.

    The linecard blank has plastic latches. You can save the blank for future use as needed. The blank is needed for the switch to operate normally for an unpopulated linecard slot.

     

Linecards

This section displays the linecards supported by modular switches this guide covers.

 

Figure 1. DCS-7800R3-48CQ, DCS-7800R3K-48CQ, DCS-7800R3-48CQM, DCS-7800R3-48CQ2, DCS-7800R3-48CQMS, and DCS-7800R3-48CQM2

1 Linecard status LED 2 Port numbers 3 Port status LEDs

 

 

Figure 2. DCS-7800R3-36P

1 Linecard status LED 2 Port numbers 3 Port status LEDs

 

 

Figure 3. DCS-7800R3-36D and DCS-7800R3K-36DM

1 Linecard status LED 2 Port numbers 3 Port status LEDs

 

 

Figure 4. DCS-7800R3K-72Y-LC

1 Linecard status LED 2 Port numbers 3 Port status LEDs

 

Rear Panel

This section displays the rear panel of all switches this guide covers.

 

Note: Depending on the components used to populate the chassis, the appearance of a specific switch could be different.

 

 

Figure 1. DCS-7804 Rear Panel (Fully Populated)
1 ESD attachment point 3 Fabric modules 5 Fabric module ejector lever
2 Chassis ground 4 Fabric module screw    

 

 

Figure 2. DCS-7808 Rear Panel (Fully Populated)

1 Fabric module screw 3 Chassis ground
2 Fabric module ejector lever 4 ESD attachment point

 

 

Figure 3. DCS-7812 Rear Panel (Fully Populated)
1 ESD attachment point 3 Fabric module ejector lever 5 Fabric module release button
2 Fabric module release button 4 Fabric module ejector lever    

 

 

Figure 4. DCS-7816 Rear Panel (Fully Populated)

1 Fabric module screw 4 Fabric module 7 Fabric module ejector lever
2 Fabric module ejector lever 5 ESD attachment point 8 Fabric module screw
3 Fabric module screw 6 Fabric module screw 9 Fabric module

 

 

Figure 5. DCS-7816L Rear Panel (Fully Populated)


1 Cover release 4 Fabric module ejector lever 7 Fabric module release button
2 ESD attachment point 5 Fabric module    
3 Fabric module release button 6 Fabric module ejector lever    

 

Front Panel

This section displays the front panel of all switches this guide covers.

 

Note: Depending on the components used to populate the chassis, the appearance of a specific switch may differ.

 

 

Note: All switches are designed to fit in 19-inch racks.

 

 

Figure 1. DCS-7804 Front Panel (Fully Populated)

 
1 Power supplies 4 Linecard 7 Supervisor lock
2 Linecard and Supervisor extraction tool tether 5 Linecard lock 8 Grounding locations
3 Extraction tool 6 Supervisor modules 9 ESD attach point

 

 

Figure 2. DCS-7808 Front Panel (Fully Populated)

 
1 Power supplies 4 Linecards 7 Supervisor lock
2 Linecard and Supervisor extraction tool tether 5 Linecard lock 8 Grounding locations
3 Extraction tool 6 Supervisor modules 9 ESD attach point

 

 

Figure 3. DCS-7812 Front Panel (Fully Populated)

 
1 Power supplies 4 Linecard 7 Supervisor lock
2 Linecard and Supervisor extraction tool tether 5 Linecard lock 8 Grounding locations
3 Extraction tool 6 Supervisor modules 9 ESD attach point

 

 

Figure 4. DCS-7816 Front Panel (Fully Populated)

 
1 Power supplies 6 Supervisor modules 11 Extraction tool
2 Linecard and Supervisor extraction tool tether 7 Supervisor lock 12 Grounding locations
3 Extraction tool 8 Linecard 13 ESD attach point
4 Linecard 9 Linecard lock    
5 Linecard lock 10 Linecard and Supervisor extraction tool tether    

 

 

Figure 5. DCS-7816L Front Panel (Fully Populated)


 
1 Power supplies 6 Linecard 11 Supervisor lock
2 Linecard and Supervisor extraction tool tether 7 Linecard lock 12 Grounding locations
3 Extraction tool 8 Supervisor module 13 ESD attach point
4 Linecard 9 Supervisor lock    
5 Linecard lock 10 Supervisor module    

 

Parts List

Each switch has an accessory kit that contains the parts required to install it. The Table 1 provides further details on each accessory kit.

 

Table 1. Accessory Kits for the Modular Switches
  DCS-7804 DCS-7808 DCS-7812 DCS-7816 DCS-7816L
Common Cables and Accessories

(See Parts Used in All Rack Mount Configurations)

 Included Included Included Included Included
Four-post Rack Mount Kit

(See Four-Post Rack Mount Parts)

 Included Included Included Included Included
Number of Power Cords Included 12 16 20 24 24
Lifting Kit Not applicable Not applicable 4x brackets 8x bolts 4x brackets 16x bolts 4x brackets 16x bolts

 

 

Warning:

All provided power cables are for use only with Arista products.

 

Câbles d’alimentation doivent être utilisés uniquement avec des produits de Arista

 

 

The following sections in the chapter list the installation parts provided by the accessory kit in more detail:

Parts Used in All Rack Mount Configurations

Cables

Table 2. Cables Provided in Accessory Kit
Quantity Description
2 RJ-45 Patch Panel Cables, 2 meters.
2 RJ-45 to DB9 Adapter Cable, 2 meters.

 

Getting-Started Booklet

One 2-page document.

Four-Post Rack Mount Parts

The following sections list the parts provided in the accessory kit for four-post rack mount installations.

 

Table 3. Four-Post Rack Mount Parts
Quantity Description
1 Cradle assembly.
12 Rack mounting screws.
1 Template for rack mounting (used only for racks requiring mounting nuts.)

 

 

Figure 1. Four-Post Rack Mount Parts

 

 

Figure 2. Lifting Bracket and Bolts (DCS-7812 and DCS-7816 only)

1 Lifting bracket
2 Bolts

 

Status Indicators

This section discusses the following topics:

Supervisor Module

While the front panel of each switch can house two supervisors, switch operations require only one. Supervisors display switch status and contain Ethernet management and console ports. The supervisor provides:

System Level Status Indicator LEDs: DCS-7800-SUP-D

The system status indicator LEDs are shown in Figure 1.

 

Figure 1. Supervisor DCS-7800-SUP-D


 
1 Locking mechanism 5 Linecard status LED 9 RJ-45 Serial management port
2 Supervisor status LED 6 Fabric Module status LED 10 USB Ports
3 Supervisor active status LED 7 Fan status LED 11 RJ-45 Ethernet management port
4 PSU status LED 8 Clock In 12 SFP Ethernet management port

 

Supervisor Status LEDs

Supervisor Status LED States interprets the states of the supervisor status LEDs for both the active and the redundant supervisor modules.

 

Table 1. Supervisor Status LED States
Supervisor and System Condition (1) LED Name and State
Status Active Power Supply (PSU) Linecard (LC) Fabric Module (FM) Fan Module Ethernet Port
Link (Left) Activity (Right)
No power, failed, or improperly inserted. Off Off Off Off Off Off Off Off
Booting Blinking Green Off Off Off Off Off Off Off
Beacon Request Locate Blue Off Off Off Off Off Off Off
Normal Active Operation (Master Supervisor) System Status: Good Green Green Green Green Green Green (2) (2)
Redundant Supervisor (Active-Standby) Status: Good Green Off Off Off Off Off Off Off
Forced fail-over to redundant supervisor (Not active) Status: Bad Red Off Off Off Off Off Off Off
Supervisor active and operating normally; No PSUs, LCs, FMs, or Fan Modules present or powered Green Green Off Off Off Off Off Off
Supervisor active, Status: PSU failure (one or more) - no AC input, DC output, Over current or not enough PSUs present Green Green Red (3) (3) (3) (2) (2)
Supervisor active, Status: LC failure (one or more) Green Green (3) Red (3) (3) (2) (2)
Supervisor active, Status: FM failure (one or more) Green Green (3) (3) Red (3) (2) (2)
Supervisor active, Status: Fan Module failure (one or more) or not present Green Green (3) (3) (3) Red (2) (2)
Supervisor active, Ethernet port linked with activity Green Green (3) (3) (3) (3) Green Green
Supervisor active, Ethernet port linked with no activity Green Green (3) (3) (3) (3) Green Off
Supervisor active, Ethernet port not linked Green Green (3) (3) (3) (3) Off Off

1 Assumes a redundant supervisor is present.

2 Depends on port operation.

3 Green for normal operation, red if no corresponding component is powered or present.

 

 

Note: Arista modular switches take 15 to 30 minutes to boot completely.

 

Linecard Module Indicators

Each linecard module provides one status LED plus LEDs for each port on the card. Linecard Status LED shows a representative linecard. The figures in linecards indicate the location of the LEDs on each linecard.

 

Figure 2. Linecard Status LED

 
1 Linecard status LED
2 Port status LED

 

Linecard Status LED States interprets the states of the status LED.

 

Table 2. Linecard Status LED States
LED State Status
Off Linecard not inserted.
Green Linecard operating normally.
Yellow (amber/orange) Linecard administratively shut down or booting up.
Red Linecard has failed.
Red (blinking) Locator function is enabled.

 

The linecard provides LEDs for each port module socket:
  • Each LED corresponds to a module.
  • A set of four LEDs correspond to each module. The first LED in the set reports status when the module is programmed as a 40G port. When the module is programmed as four 10G or 100G ports, each port is assigned to an LED within the set.
  • For linecards that support OSFP and QSFP-DD ports with one LED per port, Linecard Port LED States interpret the port LED states.

     

    Table 3. Linecard Port LED States
    LED State Status
    Off Port link is down for all enabled interfaces.
    Green Port link is up for any enabled interface.
    Yellow (amber/orange) Port is disabled in the software.
    Flashing yellow (amber/orange) Locator function is enabled on an interface.

     

Fabric Module Status Indicators

Fabric Status LEDs are on fan-fabric modules. The Rear Panel displays the position of these modules on the rear of each switch. The following figure displays the fan status and fabric status LEDs on the DCS-7804 switch. Figure 5 display fan status and fabric status LEDs on the DCS-7808 and DCS-7816 switches.

 

Note: The fabric modules are installed vertically in the chassis. They are shown horizontally in the following illustrations.

 

 

Figure 3. DCS-7804R3-FM Fabric Module and Fan Status LEDs
 
1 Fabric module top 3 Fan module 2 status LED 5 Fan module 4 status LED
2 Fan module 1 status LED 4 Fan module 3 status LED 6 Fan module 5 status LED

 

The following figure displays the LEDs for the fan status and fabric status on the DCS-7812 switch.

 

Figure 4. DCS-7812R3-FM Fabric Module
 
1 Fabric module top 6 Fan module 4 status LED 11 Fan module 8 status LED
2 Fabric module status LED 7 Fan module 5 status LED 12 Fan module 9 status LED
3 Fan module 1 status LED 8 Fan module 6 status LED 13 Fan module 10 status LED
4 Fan module 2 status LED 9 Fabric module ejector lever 14 Fan module 11 status LED
5 Fan module 3 status LED 10 Fan module 7 status LED    

 

 

Figure 5. DCS-7808R3-FM and DCS-7816R3-FM Fabric Module and Fan Status LEDs
 
1 Fabric module top 5 Fan module 3 status LED 9 Fan module 7 status LED
2 Fabric module status LED 6 Fan module 4 status LED 10 Fan module 8 status LED
3 Fan module 1 status LED 7 Fan module 5 status LED    
4 Fan module 2 status LED 8 Fan module 6 status LED    

 

For the 7816 switch, the lower fabric module fan modules are numbered 9 through 16.

 

Note:
  • DCS-7816R3-FM and DCS-7808R3-FM look similar. Check the label before populating the chassis.
  • For the DCS-7816 switch, the top and bottom fabric modules form one logical fabric module. Both physical modules in a logical pair turn off if either loses power.
  • The show module command lists the serial number (SN) of only the bottom-slot Fabric Module.

 

Fan Status and Fabric Status LEDs on the Rear Panel interpret the state of the fan and fabric status LED.

 

Table 4. Fan Status and Fabric Status LEDs on the Rear Panel
LED State Status
Off Module inserted, but the status is unknown.
Green Module operating normally.
Red Module failed.

 

Power Supply Status Indicators

PWR-D1-3041-AC-BLUE

The power supply status LEDs are on the power supply modules. Figure 6 displays all the LEDs on the PWR-D1-3041-AC-BLUE AC power supply.

 

Figure 6. PWR-D1-3041-AC-BLUE Power Supplies

 
1 Handle 4 AC_A LED
2 Output 5 Release
3 AC_B LED    

 

 

Note: Handle color indicates airflow direction.

 

AC Power Supply Status LED States interprets the AC power supply setup for LED status indicators.

 

Table 5. AC Power Supply Status LED States
Power Supply Status LED Name
AC_A AC_B Output
Normal Operation(1) Green Off Green
No AC Input - Single PSU Off Off Off
No AC Input - Parallel PSUs Yellow Yellow Off
Standby Mode Green Off Blinking Green(2)
AC_A Fail Yellow Green Green
AC_B Fail Green Yellow Green
Power Supply Fault Green Off Yellow
Boot Loader Off Off Blinking(3)

1 AC_A is the primary input.

2 1 Hz, 50% Duty Cycle.

3 1 Hz, 50% Green, 50% Yellow.

 

PWR-D2-3041-DC-BLUE

The power supply status LEDs are on the power supply modules. Figure 7 displays all the LEDs on the PWR-D2-3041-DC-BLUE DC power supply.

 

Figure 7. PWR-D2-3041-DC-BLUE Power Supplies

 
1 Status LED (Output) 4 Input_A LED 7 Battery return terminal
2 Release 5 Protective earth terminal 8 -48V terminal
3 GND terminal 6 Input_B LED    

 

 

Note: Release lever color indicates airflow direction.

 

DC Power Supply Status LED States interprets the DC power supply setup for LED status indicators.

 

Table 6. DC Power Supply Status LED States
Power Supply Status LED Name
Input_A Input_B Output
Normal Operation Green Green Green
No DC Input - Single PSU Off Off Off
No DC Input - Parallel PSUs

(Standby Mode 2)

 Yellow Yellow Off
Standby Mode 1 Green Green Blinking Green(1)
Input_A Fail Yellow Green Green
Input_B Fail Green Yellow Green
Power Supply Fault Green Green Yellow
Boot Loader Off Off Blinking(2)

1 1 Hz, 50% Duty Cycle.

2 1 Hz, 50% Green, 50% Yellow.

3 States can be combined.

 

Configuring the Modular 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) that is 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 theadmin, 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 Power Supplies).
  2. Connect the console port to a PC.

    As the switch boots without a startup-config file, it displays this message 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 admin at 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 1/1
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

     

  11. When the management port IP address is configured, select 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 the complete switch configuration information.

Cabling the Modular Switch

This section discusses the following topics:

Cabling the Power Supplies

Before you begin, refer to the Arista Networks document Compliance and Safety Guide, available at https://www.arista.com/en/support/product-documentation.

 

Note: Power supplies may be loaded in the PSU bays in any order. The following order is recommended for each switch covered by this guide.

 

 

Table 1. Recommended PSU Bay Population Order
Switch Order
DCS-7804 8, 7, 6, 5, 4, 3, 2, 1
DCS-7808 6, 12, 5, 11, 4, 10, 3, 9, 2, 8, 1, 7
DCS-7812 9, 18, 8, 17, 7, 16, 6, 15, 5, 14, 4, 13, 3, 12, 2, 11, 1, 10
DCS-7816 8, 16, 24, 7, 15, 23, 6, 14, 22, 5, 13, 21, 4, 12, 20, 3, 11, 19, 2, 10, 18, 1, 9, 17

 

The following figure shows the recommended order. A blank (X) should be placed on all unpopulated bays.

 

 

 

Note: '*' designates the recommended starting bay.

 

 

Important:

Power down the switch. Remove all power cords from the power inlets.

 

Mettez le commutateur: Retirez tous les cordons d'alimentation des prises d'alimentation.

 

 

Important:

The installation of this equipment must comply with local and national electrical codes. Consult with the appropriate regulatory agencies and inspection authorities to ensure compliance if necessary.

 

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.

 

 

Note:

Many configurations will require additional power supplies.

 

Nombreuses configurations exigera des alimentations supplémentaires.

 

 

Important:

All power supply slots must be filled with either a power supply or blank to ensure proper airflow.

 

Tous les emplacements d'approvisionnement de puissance doivent être remplis avec une alimentation ou vide pour assurer un débit d'air appropriée.

 

 

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.

 

 

Power Supply Configurations show each switch's minimum number of operating power supplies connected to active circuits.

Each power supply includes a fan that maintains proper power supply temperature. The appendices display the location of components for all switches described in this guide.

Cabling Chassis Ground

Note: This section applies only to +48VDC input installations. A bonding wire from the chassis to the rack and/or the data center ground is optional for AC input installations.

Figure 1, Figure 2, Figure 3, and Figure 4 display the location of the chassis grounding locations on the front panel of the switches. Additional grounding locations are on the rear panel of the switch chassis. After mounting the switch into the rack, connect at least one of the chassis grounds to the data center ground using two-hole ground lugs with 16 mm (5/8 in.) spacing and two M4 x 0.7 screws. After the switch is grounded, ESD wrist straps can be grounded by connecting them to one of the attach points.

 

Important:

Grounding wires and grounding lugs are not supplied. Wire size should meet local and national installation requirements. Commercially available 2 or 4 AWG wire is recommended for installations in the U.S.

 

À la terre et de mise à la terre fils cosses ne sont pas fournis. Calibre des fils doit satisfaire des exigences de l'installation locale et nationale. Disponible dans le commerce 2 ou 4 AWG fil est recommandé pour les installations aux États-Unis.

 

 

Important:

This equipment must be grounded. Never defeat the ground conductor. This unit requires over-current protection.

 

Cet équipement doit être mis à la terre. Ne jamais modifier le conducteur de terre. Cet appareil nécessite de protection contre les surintensités.

 

 

Important:

Secondary Grounding wires, lugs, and screws (M4 x 0.7) are not supplied.

 

Secondaire à la terre, câbles, cosses et vis (M4 x 0.7) ne sont pas fournis.

 

 

Figure 1. Front Panel (DCS-7804)

 
1 Power supplies 4 Linecards 7 Supervisor lock
2 Linecard and Supervisor extraction tool tether 5 Linecard lock 8 Grounding locations
3 Extraction tool 6 Supervisor modules 9 ESD attach point

 

 

Figure 2. Front Panel (DCS-7808)

 
1 Power supplies 4 Linecards 7 Supervisor lock
2 Linecard and Supervisor extraction tool tether 5 Linecard lock 8 Grounding locations
3 Extraction tool 6 Supervisor modules 9 ESD attach point

 

 

Figure 3. Front Panel (DCS-7812)

 
1 Power supplies 4 Linecards 7 Supervisor lock
2 Linecard and Supervisor extraction tool tether 5 Linecard lock 8 Grounding locations
3 Extraction tool 6 Supervisor modules 9 ESD attach point

 

 

Figure 4. Front Panel (DCS-7816)

 
1 Power supplies 6 Supervisor modules 11 Extraction tool
2 Linecard and Supervisor extraction tool tether 7 Supervisor lock 12 Grounding locations
3 Extraction tool 8 Linecards 13 ESD attach point
4 Linecards 9 Linecard lock    
5 Linecard lock 10 Linecard and Supervisor extraction tool tether    

 

 

Figure 5. Front Panel (DCS- 7816L)

 
1 Power supplies 6 Linecard 11 Supervisor lock
2 Linecard and Supervisor extraction tool tether 7 Linecard lock 12 Grounding locations
3 Extraction tool 8 Supervisor module 13 ESD attach point
4 Linecard 9 Supervisor lock    
5 Linecard lock 10 Supervisor module    

 

 

Note: Remove all power cords from the power inlets to turn off the switch.

 

Cabling the AC Power Supplies

The switches use PWR-D1-3041-AC-BLUE (Figure 6) power supplies with SAF-D-GRID connectors on the PSU inputs. Power cables are included with the accessory kit (Table 1). To power the switch, insert the other side of the cable into the main power-providing circuit.

 

Note: The power supply, handle color, orientation, etc., may differ from the one shown on your device in Figure 6.

 

 

Figure 6. AC Power Supply


 

The Front Panel displays the front panel location of the power supplies.

 

Note:
  • The LEDs on a PSU remain lit even after you disconnect the power and remove the PSU from the chassis. They will eventually turn off in a short while.
  • The PWR-D1-3041-AC-BLUE PSU uses 2x 220 V supply inputs and uses 2 APP SAF-D-GRID 400 connectors.

 

Cabling the DC Power Supply

Note: The -48V and Battery-Return leads are a pair and should run adjacent and be approximately the same length.

 

Le - 48V et câbles de batterie-retour sont une paire courir à côté de l'autre et doivent être à peu près la même longueur.

 

DC Power Supplies

The switches support the PWR-D2-3041-DC-BLUE DC power supply displayed in Figure 7.

 

Figure 7. PWR-D2-3041-DC-BLUE Power Supplies

 

 

Note: Release lever color indicates airflow direction.

 

Wire and Lug Preparation

Remove power from DC circuits by turning off the power line servicing the circuits before installing. Prepare the stranded wiring before you begin a DC power installation.
  1. Stranded copper wiring is required.
    • Commercially available 1 to 2 AWG wire is recommended for installations in the U.S.
    • Wire size should meet local and national installation requirements.
    • Grounding wires and grounding lugs are not supplied.
    • Strip the wires to the appropriate length for the lugs.

       

    The wires connecting the DC power supply to the power source must meet the following requirements:

    • DC Input Wire Size: 1– 2 AWG.
    • Primary Ground Wire Size: 1– 2 AWG per power supply.
    • The conductors are copper.

       

  2. Use agency-approved compression (pressure) lugs for wiring terminations (2x - Two M6 studs with 5/8" spacing).
  3. Slip on heat-shrink tubing on the wire ends before assembling the lugs onto the wire.
    • The lugs must be crimped with the proper tool.
    • The tubing should extend over the lug’s barrel and the wire's insulator.

       

  4. Shrink the tubing with a heat gun.

     

    Figure 8. Lugs Wiring Terminations


    1 Insulated wire 3 Lug 5 Half-inch width
    2 Heat-shrink tubing 4 Quarter-inch diameter hole 6 Five-eighth-inch apart centers
     

Power Supply Specifications

The Table 2 shows the power supply specifications for each of the PSUs supported.

 

Table 2. Power Supply Specifications (each PSU)
Power Supply Maximum Output Power Rating (DC) Input Voltage and Frequency Maximum Input Current Input Branch Circuit Protection
PWR-D1-3041-AC-BLUE 3000 W 200 to 240 VAC(nominal) 50/60 Hz (nominal) 2x 16 A 2x 20 A
PWR-D2-3041-DC-BLUE 3000 W -48 V to -60 VDC, 70 A to 55A 2x 70 A 2x 90 A

 

 

Important:

Each power supply requires input branch circuit protection in compliance with AHJ requirements.

 

Chaque alimentation nécessite une protection du circuit de la branche d’entrée conformément aux exigences de l’AHJ.

 

Power Supply Configurations

The following table shows the power supply configurations for the modular switches.

 

Table 3. Power Supply Configurations
Modular Switch Number of PSUs Shipped in Bundle Maximum Number of PSUs Supported
DCS-7804 6 8
DCS-7808 8 12
DCS-7812 10 18
DCS-7816 12 24

 

Recommendations for Power Supply Usage

  • Use separate circuits (A and B) to protect each power supply.
  • When replacing a failed PSU, use the same PSU model. If the original model is no longer supported or available, an alternative PSU must be approved before use.
  • Only mix power supply types if your switch allows mixing power supplies.
  • To minimize distribution power loss, use an equal number of supplies in each row (e.g., 4 PSUs in slots 1-4 and 4 PSUs in slots 7-10 for a configuration with 8 PSUs for the DCS-7808 switch). Cabling the Power Supplies provides more details.

     

    Note: The DCS-7808 switch can house PSUs in either of two rows. The LEDs for PSUs in each row indicate correct status only after at least one of the PSUs in that row (PSU1 to PSU6 or PSU7 to PSU12) is energized from a power source. For the DCS-7812 and DCS-7816 switches, all PSU LEDs will report status correctly as long as one PSU is powered.

     

  • All power supply slots must be filled with a powered supply, a blank (X), or a non-powered power supply.
  • Valid redundancy configurations for each domain are described in Power Supply Redundancy.

     

Power Supply Redundancy

Important:

The installation of this equipment must comply with local and national electrical codes. Consult with the appropriate regulatory agencies and inspection authorities to ensure compliance if necessary.

 

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.

 

 

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.

 

Most installations will have redundant, dual, independent power feeds. Each independent power feed will be referenced as A and B.

The recommended installation is to wire input_A and input_B of each supply to an independent power feed (A or B).

 

Note: When powered cables are connected to both A and B inputs of the PSU, the AC PSU will draw current from the A input. The B input is held in standby. The DC PSU will share power based on the input voltage.

 

Each power supply includes a fan that maintains proper power supply temperature. The appendices display the location of the components on all switches described in this guide.

The Front Panel displays the front panel location of the supervisor modules, linecards, and PSUs.

The Rear Panel displays the rear panel location of fabric modules.

 

Important:

This unit requires over-current protection.

 

Cet appareil nécessite de protection contre les surintensités.

 

 

Important:

Unused slots must be occupied or covered with a blank to ensure proper airflow through the chassis.

 

Les emplacements inutilisés doivent être occupés ou recouvert d'un blanc pour assurer la bonne circulation d'air dans le châssis.

 

Connecting Supervisor Cables

Supervisor modules contain console, management, and USB ports. Figure 9 display port and status LED locations on the supervisors. For additional information about the serial port, refer to the chassis specification in Figure 10.

 

Figure 9. Supervisor DCS-7800-SUP, DCS-7800-SUP1A, and DCS-7816-SUP

 
1 Locking mechanism 5 Linecard status LED 9 RJ-45 Serial management port
2 Supervisor status LED 6 Fabric Module status LED 10 USB Ports
3 Supervisor active status LED 7 Fan status LED 11 RJ-45 Ethernet management port
4 PSU status LED 8 Clock In 12 SFP Ethernet management port

 

  • Console (Serial) Port:Connect to a PC with RJ-45 to DB-9 serial adapter cable. Default switch settings include:
    • 9600 baud
    • No flow control
    • 1 stop bit
    • No parity bits
    • 8 data bits

       

The appropriate supervisor cards must be installed in one of the designated slots. They are shown in Figure 10 for the DCS-7808 switch. For the DCS-7816 switch, the supervisor slots are in the middle of the chassis.

 

Figure 10. DCS-7808 Supervisor Slots

 
1 Power supplies 4 Linecards 7 Supervisor lock
2 Linecard and Supervisor extraction tool tether 5 Linecard lock 8 Grounding locations
3 Extraction tool 6 Supervisor modules 9 ESD attach point

 

 

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

 

  • Ethernet management port: Connect to 10/100/1000 management network with RJ-45 cable.
  • USB Port: This may be used for software or configuration updates.
  • Clock Input Port: The port type is MCX connector, 2-5.5V, 50 ohm termination.

     

Connecting Linecard Modules and Cables

Install required SFP, SFP+, QSFP+, QSFP100, OSFP, and QSFP-DD optic modules in linecard module ports (Figure 11).

 

Figure 11. SFP or SFP+ Ports


 

Connect cables as required to linecard module ports. Supervisor and linecard module ejectors on the front of the chassis assist with cable management.

 

CAUTION:

Excessive bending can damage interface cables, especially optical cables.

 

Flexion excessive peut endommager les câbles d'interface, en particulier les câbles optiques.

 

 

Note: You must ensure that the appropriate “blank” plates cover any open slots for modules, power supplies, etc. Check with your local Arista Networks representative if you have questions.